Trailing-Edge
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PDP-10 Archives
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bb-m780a-sm
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monitor-sources/sched.mac
There are 52 other files named sched.mac in the archive. Click here to see a list.
; UPD ID= 539, SNARK:<5.MONITOR>SCHED.MAC.85, 15-Mar-82 17:39:08 by COBB
;TCO 5.1754 - Check arguments of SKED% jsys
; UPD ID= 477, SNARK:<5.MONITOR>SCHED.MAC.84, 12-Feb-82 16:55:49 by MURPHY
;TCO 5.1730 - Restore lost flags, fix APSKED.
; UPD ID= 456, SNARK:<5.MONITOR>SCHED.MAC.83, 1-Feb-82 19:09:20 by MILLER
;TCO 6.1059. Treat BSCRSK and PIBMP the same as JP%SYS
; UPD ID= 455, SNARK:<5.MONITOR>SCHED.MAC.82, 1-Feb-82 16:08:39 by MILLER
; UPD ID= 454, SNARK:<5.MONITOR>SCHED.MAC.81, 1-Feb-82 15:53:07 by MILLER
;Fix missing ENDIF. in previous edit
;TCO 6.1059 AGAIN. Give JP%SYS forks a little less of a boost
; UPD ID= 441, SNARK:<5.MONITOR>SCHED.MAC.80, 25-Jan-82 13:56:01 by MILLER
;TCO 6.1059. CORFCT fixes
; UPD ID= 438, SNARK:<5.MONITOR>SCHED.MAC.79, 25-Jan-82 00:00:57 by MURPHY
;TCO 5.1697 - XSSEV%, etc. Handle extended entry vectors in UU1050, DMSENT.
; UPD ID= 421, SNARK:<5.MONITOR>SCHED.MAC.77, 19-Jan-82 15:07:15 by MILLER
;TCO 5.1689. Fix run time guarantee
; UPD ID= 405, SNARK:<5.MONITOR>SCHED.MAC.76, 16-Jan-82 13:51:26 by PAETZOLD
;TCO 5.1680 - fix TCO 5.1658
; UPD ID= 384, SNARK:<5.MONITOR>SCHED.MAC.75, 8-Jan-82 16:35:28 by MURPHY
;TCO 5.1660 - Tags in MENTR, MRETN for JSLOOK program.
; UPD ID= 382, SNARK:<5.MONITOR>SCHED.MAC.74, 7-Jan-82 21:44:02 by PAETZOLD
;TCO 5.1658 - preserve PIFL in carrier off interrupt requests in PIRCOF and PIRLG1
; UPD ID= 330, SNARK:<5.MONITOR>SCHED.MAC.73, 30-Nov-81 10:02:29 by DONAHUE
;TCO 5.1522 - set active Batch jobs if the Batch class is set after startup
; UPD ID= 326, SNARK:<5.MONITOR>SCHED.MAC.72, 18-Nov-81 17:41:45 by MURPHY
;TCO 5.1615 - MAKE SETPCV INTERNAL
; UPD ID= 308, SNARK:<5.MONITOR>SCHED.MAC.71, 3-Nov-81 16:45:59 by MOSER
;TCO 5.1580 LOOK AT NBPROC INSTEAD OF NGOJOB TO DETERMINE IF RUNNABLE JOB
; UPD ID= 307, SNARK:<5.MONITOR>SCHED.MAC.70, 3-Nov-81 16:37:36 by MOSER
;TCO 5.1579 USE CORRECT TEST AT CORFC5: SO INTERACTIVE JOBS GET CORRECT PRIO.
; UPD ID= 299, SNARK:<5.MONITOR>SCHED.MAC.69, 28-Oct-81 11:29:02 by MURPHY
;Disable HPSCHK for now.
;Make HPSCHK less sensitive.
; UPD ID= 290, SNARK:<5.MONITOR>SCHED.MAC.68, 22-Oct-81 16:01:46 by MURPHY
;Ditto
; UPD ID= 287, SNARK:<5.MONITOR>SCHED.MAC.67, 22-Oct-81 11:35:17 by MURPHY
;Fix bug in 5.1428
; UPD ID= 262, SNARK:<5.MONITOR>SCHED.MAC.66, 15-Oct-81 13:25:44 by SCHMITT
;Reinsert TCO 5.1419 but check JOBRT instead of JOBDIR
; UPD ID= 258, SNARK:<5.MONITOR>SCHED.MAC.65, 13-Oct-81 16:15:31 by MURPHY
;Remove TCO 5.1419, ID 51 - it prevented class from being set during LOGIN
; UPD ID= 257, SNARK:<5.MONITOR>SCHED.MAC.64, 13-Oct-81 10:55:42 by MURPHY
;TCO 5.1570 - Fix bug in computation of utilization.
; UPD ID= 252, SNARK:<5.MONITOR>SCHED.MAC.63, 7-Oct-81 14:41:13 by PAETZOLD
;Remove TCO 5.1559 as it caused problems
; UPD ID= 244, SNARK:<5.MONITOR>SCHED.MAC.62, 5-Oct-81 10:38:27 by PAETZOLD
;TCO 5.1559 - Treat NVT's as real TTY's and not as PTY's in NEWST
; UPD ID= 210, SNARK:<5.MONITOR>SCHED.MAC.61, 23-Sep-81 15:38:04 by MURPHY
;TCO 5.1530 - reset local flags in AJBALS
; UPD ID= 162, SNARK:<5.MONITOR>SCHED.MAC.60, 9-Sep-81 17:26:10 by MURPHY
;Get rid of XCT of BUGHLT - make it CALL instead. (REEBUG)
;Revise previous - preserve T3 and T4 in CORFCT
; UPD ID= 119, SNARK:<5.MONITOR>SCHED.MAC.59, 25-Aug-81 09:27:18 by GRANT
;Preserve T3 and T4 over CALL CORFCT in ONGOL
; UPD ID= 95, SNARK:<5.MONITOR>SCHED.MAC.58, 8-Aug-81 09:52:19 by HALL
;Add some comments
; UPD ID= 94, SNARK:<5.MONITOR>SCHED.MAC.57, 7-Aug-81 13:15:19 by SCHMITT
;TCO 5.1439 - Do not perform JSYS trapping on execute only process
; UPD ID= 93, SNARK:<5.MONITOR>SCHED.MAC.56, 7-Aug-81 13:09:43 by SCHMITT
;TCO 5.1440 - Load Job number before compare at HLTJOB
; UPD ID= 91, SNARK:<5.MONITOR>SCHED.MAC.55, 5-Aug-81 11:54:00 by MURPHY
;Ditto
; UPD ID= 64, SNARK:<5.MONITOR>SCHED.MAC.50, 22-Jul-81 17:28:19 by MURPHY
;TCO 5.1428 - Detect excessive time in CSKED, etc.
;Compute job utilization always.
; UPD ID= 52, SNARK:<5.MONITOR>SCHED.MAC.49, 20-Jul-81 15:51:58 by MOSER
;MORE OF TCO 5.1406 SAVE T REGS.
; UPD ID= 51, SNARK:<5.MONITOR>SCHED.MAC.48, 20-Jul-81 10:15:59 by SCHMITT
;Edit 1910 - TCO 5.1419 - Check if job is logged in at CHGCLS
; UPD ID= 48, SNARK:<5.MONITOR>SCHED.MAC.47, 17-Jul-81 16:20:22 by MURPHY
;TCO 5.1398 - HANDLE SKIP RETURN FROM MSETPT
; UPD ID= 16, SNARK:<5.MONITOR>SCHED.MAC.46, 10-Jul-81 09:20:55 by MOSER
;TCO 5.1406 - IF ILLEGAL MEMORY WRITE ON ERCAL RETURN THIS ERROR TO USER.
; UPD ID= 8, SNARK:<5.MONITOR>SCHED.MAC.45, 9-Jul-81 17:13:00 by MURPHY
; TCO 5.1396 - BIT IN JOBBIT TO INDICATE SYSTEM FORK - GETS HIGH PRIORITY
;<5.MONITOR>SCHED.MAC.44, 30-Jun-81 11:23:32, EDIT BY MURPHY
;<5.MONITOR>SCHED.MAC.43, 29-Jun-81 13:45:20, EDIT BY MURPHY
;<5.MONITOR>SCHED.MAC.42, 29-Jun-81 11:58:33, EDIT BY MURPHY
;<5.MONITOR>SCHED.MAC.41, 29-Jun-81 11:43:28, EDIT BY MURPHY
;<5.MONITOR>SCHED.MAC.40, 29-Jun-81 10:55:19, EDIT BY MURPHY
; UPD ID= 2263, SNARK:<5.MONITOR>SCHED.MAC.39, 26-Jun-81 18:06:51 by MURPHY
;MAKE NOSKED/OKSKED EQUIVALENT TO NOSKD1/OKSKD1, SAME FOR CSKED, ETC.
; TCO 5.1376 -
;BAD FLAGS WHEN DEBREAK TO JOBCOF OR FLOGO; NOTE ITRAP WHEN LOGIN/LOGOUT
; UPD ID= 2195, SNARK:<5.MONITOR>SCHED.MAC.38, 12-Jun-81 13:32:16 by MURPHY
;FIX 2168 - NOSKED SHOULD HAVE BEEN NOSKD1, ETC.
; UPD ID= 2188, SNARK:<5.MONITOR>SCHED.MAC.37, 11-Jun-81 15:57:40 by MURPHY
;CHANGE TQNx TO TMNx REFLECTING CHANGE IN MACSYM
; UPD ID= 2168, SNARK:<5.MONITOR>SCHED.MAC.36, 10-Jun-81 15:46:59 by MURPHY
;ELIMINATE SCHEDULER REQUEST QUEUE, CALL FUNCTION IMMEDIATELY
; UPD ID= 2057, SNARK:<5.MONITOR>SCHED.MAC.35, 21-May-81 11:04:35 by SCHMITT
;Tco 5.1339 - Change prioritys of currently active batch jobs at SKDRDQ
; UPD ID= 2045, SNARK:<5.MONITOR>SCHED.MAC.34, 20-May-81 11:51:55 by PAETZOLD
;FIX TYPO IN PREVIOUS
; UPD ID= 2037, SNARK:<5.MONITOR>SCHED.MAC.33, 19-May-81 17:04:10 by PAETZOLD
;TCO 5.1335 DETECT OKSKED'S AND OKSKD1'S WHEN NOT NOSKED
; UPD ID= 1898, SNARK:<5.MONITOR>SCHED.MAC.32, 29-Apr-81 06:29:16 by WACHS
; UPD ID= 1855, SNARK:<5.MONITOR>SCHED.MAC.31, 21-Apr-81 07:02:36 by WACHS
;TCO 5.1290 KEEP KEEP-ALIVE COUNTER GOING ID NOSKED FOR DIAG
; UPD ID= 1707, SNARK:<5.MONITOR>SCHED.MAC.30, 16-Mar-81 11:46:40 by MURPHY
;DITTO
; UPD ID= 1668, SNARK:<5.MONITOR>SCHED.MAC.29, 11-Mar-81 17:13:23 by MURPHY
;MODIFY ENTSKD TO CHECK FOR RECURSIVE ENTRY
; UPD ID= 1570, SNARK:<5.MONITOR>SCHED.MAC.28, 19-Feb-81 14:10:20 by HALL
;TRY AGAIN RUNNING EXEC0 IN SECTION 1
; UPD ID= 1565, SNARK:<5.MONITOR>SCHED.MAC.27, 16-Feb-81 20:11:29 by MURPHY
;BUT KEEP EXEC0 IN SECTION 0
; UPD ID= 1555, SNARK:<5.MONITOR>SCHED.MAC.26, 12-Feb-81 17:42:30 by MURPHY
;MAKE PSI CODE RUN IN SECTION 1
; UPD ID= 1516, SNARK:<5.MONITOR>SCHED.MAC.25, 4-Feb-81 15:38:04 by MURPHY
;MAKE SURE UMODF ON AT PSISM1 INTERRUPT START
; UPD ID= 1471, SNARK:<5.MONITOR>SCHED.MAC.24, 22-Jan-81 09:27:41 by GRANT
;MAKE SKEDSW CONDITIONALS CONFORM TO CODING STANDARD
; UPD ID= 1463, SNARK:<5.MONITOR>SCHED.MAC.23, 21-Jan-81 11:18:10 by GRANT
;TCO 5.1230 - CHANGE OLD DEBUG SWITCH TO SKEDSW
; UPD ID= 1349, SNARK:<5.MONITOR>SCHED.MAC.22, 12-Dec-80 14:38:16 by MURPHY
;GET JOBPT SETUP EARLIER
; UPD ID= 1279, SNARK:<5.MONITOR>SCHED.MAC.21, 17-Nov-80 12:31:41 by MURPHY
;TCO 5.1198 - NBSWP NOT DECREMENTED
; UPD ID= 1273, SNARK:<5.MONITOR>SCHED.MAC.20, 14-Nov-80 17:51:56 by MURPHY
;ENSURE FORKX IS -1 WHILE RUNNING BGND TASKS
; UPD ID= 1217, SNARK:<5.MONITOR>SCHED.MAC.19, 31-Oct-80 14:57:52 by HALL
;TCO 5.1180 - MOVE DST TO NON-ZERO SECTION
; MAKE SCHED0 RUN IN SECTION 1
; UPD ID= 1208, SNARK:<5.MONITOR>SCHED.MAC.17, 29-Oct-80 11:52:52 by MURPHY
;DITTO
; UPD ID= 1205, SNARK:<5.MONITOR>SCHED.MAC.16, 28-Oct-80 17:35:05 by MURPHY
;TCO 5.1182
;NEW BIAS FLAG SK%CL1 - MAKE CLASS SCHED USE NORMAL QUEUE PRIORITIES IF 1
; UPD ID= 1088, SNARK:<5.MONITOR>SCHED.MAC.15, 1-Oct-80 12:09:05 by MURPHY
;FIX ACVAR
; UPD ID= 968, SNARK:<5.MONITOR>SCHED.MAC.14, 25-Aug-80 16:29:08 by ENGEL
;TCO 5.1136 - ADD DEVLKK
; UPD ID= 792, SNARK:<5.MONITOR>SCHED.MAC.13, 23-Jul-80 20:54:21 by MURPHY
;Fix BUG call
; UPD ID= 782, SNARK:<5.MONITOR>SCHED.MAC.12, 23-Jul-80 11:24:43 by MURPHY
;Be sure JOBRT is 0 when job created
; UPD ID= 764, SNARK:<5.MONITOR>SCHED.MAC.11, 18-Jul-80 15:20:50 by MURPHY
;DETECT NEGATIVE JOBRT
; UPD ID= 596, SNARK:<5.MONITOR>SCHED.MAC.10, 3-Jun-80 17:44:31 by MURPHY
;INIT FACTSW WITH SF%MS1 ON
; UPD ID= 546, SNARK:<5.MONITOR>SCHED.MAC.9, 21-May-80 14:34:20 by MURPHY
;ALWAYS USE HIGHER INTQ IF CLASS SCHEDULING
; UPD ID= 508, SNARK:<5.MONITOR>SCHED.MAC.8, 5-May-80 15:56:19 by MILLER
;TCO 5.1033. GIVE PIBMP IN ASSFK
; UPD ID= 499, SNARK:<5.MONITOR>SCHED.MAC.7, 30-Apr-80 15:09:56 by GRANT
;TCO 5.1030 - Make ?FULL be more informative
; UPD ID= 485, SNARK:<5.MONITOR>SCHED.MAC.6, 28-Apr-80 09:35:13 by MURPHY
; UPD ID= 465, SNARK:<5.MONITOR>SCHED.MAC.5, 23-Apr-80 13:22:17 by MURPHY
;REMOVE WRITE PROTECT CHECKS
; UPD ID= 462, SNARK:<4.1.MONITOR>SCHED.MAC.349, 23-Apr-80 12:00:31 by MURPHY
;FIX STATISTICS
; UPD ID= 431, SNARK:<4.1.MONITOR>SCHED.MAC.348, 13-Apr-80 14:35:11 by OSMAN
;Use FRKTTY instead of FKCTYP
; UPD ID= 338, SNARK:<4.1.MONITOR>SCHED.MAC.347, 17-Mar-80 13:49:19 by MURPHY
;FIX SNOOP BUG, MOVE CALL RCVCH7
; UPD ID= 322, SNARK:<4.1.MONITOR>SCHED.MAC.346, 12-Mar-80 12:14:39 by MURPHY
;FIX JOBSRT
; UPD ID= 317, SNARK:<4.1.MONITOR>SCHED.MAC.345, 11-Mar-80 11:13:06 by ELFSTROM
; UPD ID= 314, SNARK:<4.1.MONITOR>SCHED.MAC.344, 10-Mar-80 18:22:05 by MURPHY
;FIX ASSFK, CHKBMP
; UPD ID= 285, SNARK:<4.1.MONITOR>SCHED.MAC.343, 20-Feb-80 17:56:18 by MURPHY
;REVISE QUEUE PARAMETERS, FLAGS
; UPD ID= 259, SNARK:<4.1.MONITOR>SCHED.MAC.342, 12-Feb-80 18:13:27 by MURPHY
;SKDLV8 AGAIN
; UPD ID= 196, SNARK:<4.1.MONITOR>SCHED.MAC.341, 9-Jan-80 14:45:47 by MURPHY
;FIX LOST FORK CONTEXT IN SKDLV8
; UPD ID= 78, SNARK:<4.1.MONITOR>SCHED.MAC.340, 1-Dec-79 16:00:57 by MILLER
;CHECK FOR SCHEDULER ALARM SPENT IN SCDR. NEEDED NOW BECAUSE
; OF MAIN PATH REORGANIZATION.
;<4.1.MONITOR>SCHED.MAC.339, 29-Nov-79 14:26:50, EDIT BY MILLER
;<4.1.MONITOR>SCHED.MAC.338, 29-Nov-79 14:20:14, EDIT BY MILLER
;FIX TYPEO
; UPD ID= 61, SNARK:<4.1.MONITOR>SCHED.MAC.337, 29-Nov-79 14:06:08 by MILLER
;TCO 4.1.1036 AGAIN
; UPD ID= 59, SNARK:<4.1.MONITOR>SCHED.MAC.336, 29-Nov-79 14:00:19 by MILLER
;TCO 4.1.1036. SAVE AND RESTORE FLKCNT AND FKLOCK OVER JSYSES
; UPD ID= 9, SNARK:<4.1.MONITOR>SCHED.MAC.335, 21-Nov-79 17:35:26 by MURPHY
;<4.1.MONITOR>SCHED.MAC.334, 19-Nov-79 16:35:59, EDIT BY MILLER
;<4.1.MONITOR>SCHED.MAC.333, 19-Nov-79 16:28:48, EDIT BY MILLER
;COMPUTE RT TIME-OUT IN AJBALS
;<4.1.MONITOR>SCHED.MAC.332, 19-Nov-79 15:31:04, EDIT BY MILLER
;<4.1.MONITOR>SCHED.MAC.331, 19-Nov-79 11:20:07, EDIT BY MILLER
;<4.1.MONITOR>SCHED.MAC.330, 19-Nov-79 11:05:32, EDIT BY MILLER
;APPLY RT TEST TO BS HOLD TIME IF MEMORY IS OVERLOADED
;<4.1.MONITOR>SCHED.MAC.329, 13-Nov-79 14:35:25, EDIT BY MURPHY
;<4.1.MONITOR>SCHED.MAC.327, 12-Nov-79 17:25:51, EDIT BY MURPHY
;CHANGE SWAP SPACE LEVEL FOR NEW JOB CUTOFF
;<MURPHY.MON>SCHED.MAC.2, 8-Nov-79 18:04:45, EDIT BY MURPHY
;REORG CODE FOR FASTER MAIN PATH
;<4.1.MONITOR>SCHED.MAC.325, 8-Nov-79 12:25:02, EDIT BY MURPHY
;FIX AC CLOBBERAGE ON ERJMP CERTAIN CASES
;<4.MONITOR>SCHED.MAC.324, 31-Oct-79 14:18:19, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.323, 30-Oct-79 12:31:00, EDIT BY MILLER
;CHARGE BALSET HOLD TIME FOR SWAP READS AS WELL AS FILE READS
;<4.MONITOR>SCHED.MAC.322, 29-Oct-79 11:22:00, EDIT BY MILLER
;CHANGE CODE AT MENT2 TO PRESERVE NOINT IN DIAG JSYS
;<4.MONITOR>SCHED.MAC.321, 25-Oct-79 14:06:02, EDIT BY MURPHY
;TTOLST FOR FASTER WAKEUP ON TTY OUTPUT
;<4.MONITOR>SCHED.MAC.318, 24-Oct-79 12:57:13, EDIT BY GRANT
;ADD 20 MS TASK FOR RCVOK TIMER
;<4.MONITOR>SCHED.MAC.317, 24-Oct-79 10:28:02, EDIT BY MURPHY
;APSKED, BSCRSK REVISIONS, SETPCV.
;<4.MONITOR>SCHED.MAC.315, 19-Oct-79 17:20:33, EDIT BY MURPHY
;BALSET HOLD TIME ADJUSTMENTS
;<4.MONITOR>SCHED.MAC.314, 18-Oct-79 12:46:01, EDIT BY MILLER
;REMOVE CODE AT SCHED0 THAT CHECKS CRSKED.
;<4.MONITOR>SCHED.MAC.313, 15-Oct-79 13:02:57, EDIT BY MILLER
;GIVE PSBUMP IN SPIRQ EVEN IF PROCESS IS BLOCKED
;<4.MONITOR>SCHED.MAC.312, 15-Oct-79 10:15:22, EDIT BY MILLER
;FIX COMPUTATION IN CHKSNP
;<4.MONITOR>SCHED.MAC.311, 12-Oct-79 17:29:14, EDIT BY MURPHY
;IGNORE SECTION NUMBER IN CHKSNP
;<4.MONITOR>SCHED.MAC.310, 28-Sep-79 12:41:37, EDIT BY MILLER
;ONE MORE TRY. APPLY SIR SECTION TO CHANNEL ROUTINE AS WELL
;<4.MONITOR>SCHED.MAC.309, 28-Sep-79 12:31:41, EDIT BY MILLER
;FIX CODE AROUND DEBRKS TO APPLY SECTION TO INTERRUPT PC
;<4.MONITOR>SCHED.MAC.308, 27-Sep-79 15:53:36, EDIT BY MILLER
;FIX CODE AT PSIS5 TO DISALLOW INTS FROM OTHER THAN PC SIR SECTION
;<4.MONITOR>SCHED.MAC.307, 21-Sep-79 13:38:43, EDIT BY MURPHY
;CSKED - ALLOW SCHED SUBTASKS TO RUN (BUGS IN FORK.MAC NOW FIXED)
;<4.MONITOR>SCHED.MAC.306, 20-Sep-79 11:52:46, EDIT BY MILLER
;MAKE SET JOB CLASS ALWAYS DO GTOKM
;<4.MONITOR>SCHED.MAC.305, 13-Sep-79 13:32:34, EDIT BY MILLER
;PARAMETERIZE MINIMUM CLASS SHARE AND ATTENDANT VALUES
;<4.MONITOR>SCHED.MAC.304, 13-Sep-79 12:48:11, EDIT BY MILLER
;FIX .SKED COMPUTATION TO USE FAD INSTEAD OF FADR
;<OSMAN.MON>SCHED.MAC.1, 10-Sep-79 16:04:00, EDIT BY OSMAN
;TCO 4.2412 - Move definition of BUGHLTs, BUGCHKs, and BUGINFs to BUGS.MAC
;<4.MONITOR>SCHED.MAC.302, 7-Sep-79 10:10:57, EDIT BY MURPHY
;PUT CRSKED BACK, FIXES TO ERJMP STUFF
;<4.MONITOR>SCHED.MAC.301, 30-Aug-79 12:12:01, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.300, 29-Aug-79 15:10:03, EDIT BY MURPHY
;BETTER DETECTION OF ERJMP/ERCAL USAGE IN NESTED JSYSES
;<4.MONITOR>SCHED.MAC.299, 29-Aug-79 09:32:57, EDIT BY MILLER
;CHANGE PSII TO PRESERVE PENDING INTS IF FORK IS HALTED
;<4.MONITOR>SCHED.MAC.298, 28-Aug-79 15:49:43, EDIT BY MURPHY
;CSKED HANDLING - ALLOW SCHEDULER SUBTASKS TO RUN
;<4.MONITOR>SCHED.MAC.297, 27-Aug-79 13:57:48, EDIT BY MILLER
;CORRECT CODE AT CORF55
;<4.MONITOR>SCHED.MAC.296, 26-Aug-79 20:09:44, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.295, 26-Aug-79 20:02:21, EDIT BY MILLER
;USE SK%HT2 TO DETERMINE IF NO HOLD TIME FOR SKIPPED PROCESS
;<4.MONITOR>SCHED.MAC.293, 25-Aug-79 09:07:26, EDIT BY MILLER
;init mjrstf in skhwpt to be a bughlt
;<4.MONITOR>SCHED.MAC.292, 21-Aug-79 12:24:45, EDIT BY MILLER
;BE SURE PROCESS LOADED BECAUSE OF CRSKED OR PIBMP
; GETS NO HOLD TIME
;<4.MONITOR>SCHED.MAC.291, 20-Aug-79 13:34:50, EDIT BY MILLER
;CHANGE CODE @PSIS5 AND @DEBRK1 TO FORCE SECTION 0 ADDRESS IF OLD
; STYLE SIR DONE
;<4.MONITOR>SCHED.MAC.290, 19-Aug-79 18:06:26, EDIT BY GILBERT
;CHANGE FKIBSH TO FKIBH TO AVOID CONFLICT WITH FKIBS.
;<4.MONITOR>SCHED.MAC.289, 16-Aug-79 13:42:37, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.288, 16-Aug-79 13:20:25, EDIT BY DBELL
;TCO 4.2405 - INITIALIZE CRSKED ON ENTRY TO TOP-LEVEL JSYS
;<4.MONITOR>SCHED.MAC.287, 16-Aug-79 07:18:50, EDIT BY MILLER
;ONE MORE TIME
;<4.MONITOR>SCHED.MAC.286, 15-Aug-79 17:11:12, EDIT BY MILLER
;CORFC1 AGAIN. IF CLASS IN WINDFALL, INTQ0 PROCESSES GET SMALL BOOST
;<4.MONITOR>SCHED.MAC.285, 15-Aug-79 15:44:28, EDIT BY MILLER
;FIX CORFC1 TO NOT BOOST QUEUE 2 PROCESS IF ITS CLASS IS GETTING WINDFALL
;<4.MONITOR>SCHED.MAC.284, 14-Aug-79 10:09:19, EDIT BY MILLER
;DON'T HONOR SK%RQ1 IF PROCESS HAS SPECIAL PRIORITY
;<4.MONITOR>SCHED.MAC.283, 9-Aug-79 12:45:26, EDIT BY MILLER
;USE JOB LOAD AVGS
;<4.MONITOR>SCHED.MAC.282, 8-Aug-79 16:39:24, EDIT BY MILLER
;HANDLE .SAWA ARG TO "SET CLASS SHARE" FUNCTION OF SKED
;<4.MONITOR>SCHED.MAC.281, 30-Jul-79 09:30:24, EDIT BY MILLER
;DON'T MAKE CHECK FOR JOB 0 IN AJBALS
;<4.MONITOR>SCHED.MAC.280, 24-Jul-79 14:11:50, EDIT BY MILLER
;INIT QUANTT ACCORDING TO SCHEDULER SETTINGS
;<4.MONITOR>SCHED.MAC.279, 19-Jul-79 08:36:07, EDIT BY MILLER
;FIX CLDRJ TO DO LOAD AVG COMPUTATION BETTER
;<4.MONITOR>SCHED.MAC.278, 13-Jul-79 11:38:27, EDIT BY HALL
;CHANGES FOR USER MODE-EXTENDED ADDRESSING:
; DEBRK - FORCE PCS TO 1
; PSII - CHANGE INDEXED PREVIOUS CONTEXT REFERENCES TO INDIRECT
; TO ALLOW GLOBAL REFERENCING OF ALL SECTIONS INCLUDING 0
; (0 IN LH WOULD BE LOCAL IF INDEXED)
; CHANGE PSII FOR EXTENDED SIR STUFF
;<4.MONITOR>SCHED.MAC.277, 15-Jun-79 12:08:58, EDIT BY MURPHY
;REMOVE CALL TO WSMGR IN TRYLDF
;<4.MONITOR>SCHED.MAC.276, 23-May-79 13:59:12, EDIT BY HALL
;COMMENTS ONLY
;<4.MONITOR>SCHED.MAC.275, 2-May-79 14:41:45, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.274, 2-May-79 14:35:45, EDIT BY MILLER
;ALLOW LOADING OF JOB 0 FORK AT AJBAL6. ALSO, LIMIT BAL SET HOLD
; IF CLASS SCHEDULE TO NEWUTL CYCLE (AT SETIBS)
;<4.MONITOR>SCHED.MAC.273, 2-May-79 10:15:03, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.272, 1-May-79 16:53:16, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.271, 1-May-79 15:38:29, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.271, 1-May-79 14:31:24, EDIT BY MILLER
;FIX AJABLS NOT TO LOAD A PROCESS OF LOWER PRIORITY THAN ONE
; THAT WAS SKIPPED WHEN THE CLASS SCHEDULER IS ON
;<4.MONITOR>SCHED.MAC.270, 1-May-79 12:16:50, EDIT BY MILLER
;DON'T ASSIGN HOLD TIME TO PROCESS IF ANOTHER WAS SKIPPED
;<4.MONITOR>SCHED.MAC.269, 1-May-79 08:46:40, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.268, 30-Apr-79 17:54:01, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.267, 30-Apr-79 17:52:24, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.266, 30-Apr-79 13:03:24, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.265, 28-Apr-79 12:54:38, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.264, 26-Apr-79 16:46:55, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.263, 26-Apr-79 16:13:09, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.262, 26-Apr-79 13:40:12, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.261, 26-Apr-79 11:32:31, EDIT BY MILLER
;SAVE T4 ACROSS CALL TO REMWS AT AJBAL12
;<4.MONITOR>SCHED.MAC.260, 26-Apr-79 11:07:54, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.259, 26-Apr-79 10:58:44, EDIT BY MILLER
;FIX AJBALS TO LOAD OR KEEP IF PROCESS IS CSKED
;<4.MONITOR>SCHED.MAC.258, 25-Apr-79 16:55:46, EDIT BY MILLER
;MORE FIXES TO AJBALS AND TRYLDF TO ALLOW LOADING IF PIBMP IS ON
;<4.MONITOR>SCHED.MAC.257, 25-Apr-79 16:20:00, EDIT BY MILLER
;REMOVE .SKSSD FUNCTION OF SKED
;<4.MONITOR>SCHED.MAC.256, 25-Apr-79 11:51:12, EDIT BY MILLER
;CHANGE CORFCT TO COMPUTE PIBMP PRIORITY DIFFERENTLY
; CHNAGE AJBALS TO ALWAYS KEEP A PIBMP PROCESS EVEN IF AJHQOF IS SET
;<4.MONITOR>SCHED.MAC.255, 24-Apr-79 13:54:13, EDIT BY OSMAN
;FIX SETTING BATCH CLASS (CORRECT TEST FOR VALID CLASS, CORRECT ERROR CODE)
;<4.MONITOR>SCHED.MAC.254, 20-Apr-79 14:40:43, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.253, 17-Apr-79 10:40:24, EDIT BY MILLER
;ADD CHECK FOR INTERRUPTABILITY AT PSISV0
;<4.MONITOR>SCHED.MAC.252, 14-Apr-79 13:17:52, EDIT BY MILLER
;FIX UP CODE FOR JOB LOAD AVERGES
;<4.MONITOR>SCHED.MAC.251, 13-Apr-79 16:50:20, EDIT BY MURPHY
;ONE MORE TIME ON ILIST
;<4.MONITOR>SCHED.MAC.250, 13-Apr-79 11:30:48, EDIT BY BOSACK
;CLEAR FULLWORD AT LIST END IN ILIST
;<4.MONITOR>SCHED.MAC.249, 13-Apr-79 11:07:25, EDIT BY MILLER
;CHECK FOR HIGH Q EARLY IN NEWST AND AVOID EXECUTING NEDLESS INSTRUCTIONS
;<4.MONITOR>SCHED.MAC.248, 12-Apr-79 13:03:23, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.247, 12-Apr-79 11:08:31, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.246, 11-Apr-79 15:13:32, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.245, 11-Apr-79 14:48:21, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.244, 11-Apr-79 14:41:26, EDIT BY MILLER
;BE SURE BUMP PRIORITY IS REMOVED AT UNPIR
;<4.MONITOR>SCHED.MAC.243, 10-Apr-79 15:48:31, EDIT BY MILLER
;DO A "SOS NBSWP" WHEN PRELOAD TEST SUCCEEDS
;<4.MONITOR>SCHED.MAC.242, 10-Apr-79 13:24:34, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.241, 10-Apr-79 12:13:50, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.240, 10-Apr-79 11:43:14, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.239, 10-Apr-79 11:32:00, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.238, 10-Apr-79 10:20:25, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.237, 5-Apr-79 11:17:03, Edit by MCLEAN
;REMOVE FIRST ARG FROM GTOKM
;<4.MONITOR>SCHED.MAC.236, 4-Apr-79 09:08:38, EDIT BY MILLER
;CHANGE PIBMP PRIORITY COMPUTATON
;<4.MONITOR>SCHED.MAC.235, 3-Apr-79 14:29:08, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.234, 3-Apr-79 10:46:31, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.233, 3-Apr-79 10:44:23, EDIT BY MILLER
;FIX UP HANDLING OF MJBUSE. DON'T PRELOAD FORK IF DOING A PSI
;<4.MONITOR>SCHED.MAC.232, 1-Apr-79 14:37:54, EDIT BY MILLER
;MORE PSI FIXES
;<4.MONITOR>SCHED.MAC.231, 1-Apr-79 13:47:33, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.230, 1-Apr-79 13:30:25, EDIT BY MILLER
;FIX UP PRIORITY CALCULATIONS. USE PIBMP FOR PI BOOSTING
;<4.MONITOR>SCHED.MAC.229, 31-Mar-79 13:55:24, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.228, 31-Mar-79 13:49:32, EDIT BY MILLER
;MORE FIXES TO NEWUTL
;<4.MONITOR>SCHED.MAC.227, 31-Mar-79 13:15:39, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.226, 29-Mar-79 18:20:49, EDIT BY BOSACK
;FIX CORFCT SO THAT CRSKED IS HIGHER PRIORITY THAN QUEUE 0 OR 1
;<4.MONITOR>SCHED.MAC.225, 29-Mar-79 17:33:33, EDIT BY MILLER
;ADJUST CLASS PARAMETERS WHEN A JOB LOGS OUT
;<4.MONITOR>SCHED.MAC.224, 29-Mar-79 11:40:59, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.223, 29-Mar-79 11:23:50, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.222, 29-Mar-79 11:19:37, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.221, 29-Mar-79 10:35:38, EDIT BY MILLER
;FIX NEWUTL COMPUTATIONS
;<4.MONITOR>SCHED.MAC.220, 28-Mar-79 13:35:42, EDIT BY MILLER
;ZERO JOBIRT AT JOBSRT. REMOVE CALL TO ADJCLS @ NEWUTL
;<4.MONITOR>SCHED.MAC.219, 27-Mar-79 13:40:51, EDIT BY MILLER
;FIX SKDSJC TO ALLOW THIS JOB
;<4.MONITOR>SCHED.MAC.218, 26-Mar-79 13:17:52, EDIT BY MILLER
;ONE MORE TRY
;<4.MONITOR>SCHED.MAC.217, 26-Mar-79 12:35:13, EDIT BY MILLER
;CHANGE ARGS ON GTOKM FOR .GOCLS
;<4.MONITOR>SCHED.MAC.216, 23-Mar-79 10:29:53, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.215, 21-Mar-79 17:41:40, EDIT BY MILLER
;MAKE SURE JOBCLS IS CORRECT AT JOBSRT
;<4.MONITOR>SCHED.MAC.214, 20-Mar-79 18:26:37, EDIT BY MURPHY
;PERFORMANCE - RPLQ LOW LOGIC
;<4.MONITOR>SCHED.MAC.212, 13-Mar-79 17:10:02, EDIT BY HURLEY
;FIX GTOKM TO HAVE A LEADING 0 ARGUMENT
;<4.MONITOR>SCHED.MAC.211, 13-Mar-79 10:37:17, EDIT BY MILLER
;ALLOW 0 PERCENTAGE TO BE GIVEN TO A CLASS
;<4.MONITOR>SCHED.MAC.210, 11-Mar-79 12:54:43, EDIT BY KONEN
;UPDATE COPYRIGHT FOR RELEASE 4
;<4.MONITOR>SCHED.MAC.209, 9-Mar-79 16:38:59, EDIT BY MURPHY
;ELIMINATE SWAPOUT OF PSB, UPT WHEN FORK KILLED
;<4.MONITOR>SCHED.MAC.208, 9-Mar-79 13:53:30, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.207, 9-Mar-79 13:16:24, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.206, 9-Mar-79 11:58:13, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.205, 9-Mar-79 11:17:37, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.204, 8-Mar-79 15:57:31, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.203, 8-Mar-79 14:56:23, EDIT BY MILLER
;IMPROVE CHGCLS
;<4.MONITOR>SCHED.MAC.202, 8-Mar-79 11:24:53, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.201, 7-Mar-79 17:26:05, EDIT BY MILLER
;CHANGE CORFCT TO INCLUDE QUEUE 2 IN THE CLASS "INTERACTIVE" SET
;<4.MONITOR>SCHED.MAC.200, 7-Mar-79 12:50:25, EDIT BY MILLER
;DON'T HONOR SK%HQR IF USING CLASS SCHEDULER
;<4.MONITOR>SCHED.MAC.199, 6-Mar-79 10:58:13, EDIT BY OSMAN
;tco 4.2202 - SK%DRG, change u/s order in .SKRCV
;<4.MONITOR>SCHED.MAC.198, 5-Mar-79 20:05:10, EDIT BY MURPHY
;FIX PRELOAD BUG
;<4.MONITOR>SCHED.MAC.197, 4-Mar-79 13:46:14, EDIT BY MILLER
;MAKE SURE CLASS SURE IS>= .5%
;<4.MONITOR>SCHED.MAC.196, 2-Mar-79 17:48:52, EDIT BY MURPHY
;PREVENT CRSKED FORKS FROM LOCKING OUT HIGHQ FORKS
;<4.MONITOR>SCHED.MAC.195, 2-Mar-79 16:45:25, Edit by MCLEAN
;ADD NEW ERROR CODES FOR SKED%
;<4.MONITOR>SCHED.MAC.194, 1-Mar-79 15:19:01, EDIT BY BOSACK
;MAKE INTERACTIVE BIAS WITHIN CLASS SOMEWHAT STRONGER
;<4.MONITOR>SCHED.MAC.193, 1-Mar-79 13:39:34, EDIT BY OSMAN
;USE ARG BLOCK OFFSET SYMBOLS IN SKED% JSYS
;<4.MONITOR>SCHED.MAC.192, 1-Mar-79 10:47:36, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.191, 28-Feb-79 12:27:58, EDIT BY MILLER
;FIX CLDRJ
;<4.MONITOR>SCHED.MAC.190, 27-Feb-79 15:58:47, Edit by MCLEAN
;MAKE .SKRCS RETURN LOAD AVERAGES ALSO
;<4.MONITOR>SCHED.MAC.189, 27-Feb-79 14:41:22, EDIT BY MILLER
;FIX CHGCLS TO RECOMPUTE CLASS GOLST COUNTS FOR OLD AND NEW CLASSES
;<4.MONITOR>SCHED.MAC.188, 19-Feb-79 23:22:17, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.187, 13-Feb-79 16:58:26, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.186, 4-Feb-79 23:05:58, EDIT BY MURPHY
;PERFORMANCE TUNING
;<4.UTILITIES>SCHED.MAC.1, 9-Jan-79 10:41:51, EDIT BY HALL
;FIX COUNT
;<4.MONITOR>SCHED.MAC.184, 8-Jan-79 13:46:28, EDIT BY MILLER
;ONCE AGAIN, FIX UP CLASS LOAD AVG COMPUTATION
;<4.MONITOR>SCHED.MAC.183, 8-Jan-79 06:58:56, EDIT BY GILBERT
;TCO 4.2155 - Implement hidden symbol tables:
; Change PSECT bounds name.
;<4.MONITOR>SCHED.MAC.182, 7-Jan-79 23:55:21, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.178, 5-Jan-79 11:15:03, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.177, 4-Jan-79 15:38:23, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.176, 3-Jan-79 10:57:17, EDIT BY MILLER
;FIX CLASS LOAD AVG COMPUTATION
;<4.MONITOR>SCHED.MAC.175, 3-Jan-79 10:40:13, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.174, 3-Jan-79 10:31:48, EDIT BY MILLER
;<MURPHY.MON>SCHED.MAC.6, 4-Jan-79 14:46:11, EDIT BY MURPHY
;NEW HOLD LOGIC
;<4.MONITOR>SCHED.MAC.173, 2-Jan-79 17:24:18, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.172, 2-Jan-79 12:45:20, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.171, 2-Jan-79 10:24:57, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.170, 2-Jan-79 10:17:31, EDIT BY MILLER
;MAKE FIXED FOR CLASS SCHEDULER
;<4.MONITOR>SCHED.MAC.169, 29-Dec-78 12:29:50, EDIT BY MURPHY
;REVISE QUANTUM TIMES
;<4.MONITOR>SCHED.MAC.167, 29-Dec-78 11:17:53, EDIT BY MILLER
;COMPUTE ON-GOLST COUNT PER CLASS. NEEDED IN LOAD AVERAGE COMPUTATION
;<MURPHY.MON>SCHED.MAC.1, 27-Dec-78 15:25:55, EDIT BY MURPHY
;REMOVE PUFLD AND CORE NUMBERS
;ENSURE ADEQUATE STACK AT TRYLDF
;<4.MONITOR>SCHED.MAC.162, 21-Dec-78 14:38:42, EDIT BY MILLER
;DO SAME JUGGLE AT TLEINT
;<4.MONITOR>SCHED.MAC.161, 21-Dec-78 14:29:08, EDIT BY MILLER
;USE NORMAL PROCESS STACK AT PSIT1 WHEN PSIR4 IS CALLED
;<4.MONITOR>SCHED.MAC.160, 21-Dec-78 10:55:44, EDIT BY MILLER
;FIX UP REDIT ERROR. REORDR NO LONGER A SUBROUTINE
;<4.MONITOR>SCHED.MAC.159, 21-Dec-78 10:50:23, EDIT BY MILLER
;FIX REORDR
;<4.MONITOR>SCHED.MAC.158, 20-Dec-78 18:21:43, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.151, 19-Dec-78 10:23:09, EDIT BY MILLER
;REMOVE CODE THAT FORCES ERJMP TO SECTION OF CALL. UCODE 215 WORKS
;<4.MONITOR>SCHED.MAC.150, 14-Dec-78 17:23:46, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.143, 6-Dec-78 11:02:16, EDIT BY ENGEL
;MAKE PTY HUNGRY AFTER A ?FULL MESSAGE
;<4.MONITOR>SCHED.MAC.142, 5-Dec-78 14:04:50, EDIT BY MILLER
;SAVE LAST SETTING OF KNOB SO SKED JSYS ALWAYS REPPORTS ACCURATE VALUE
;<4.MONITOR>SCHED.MAC.141, 16-Nov-78 15:56:46, EDIT BY MILLER
;FIX CODE AT PSII THAT SETS NEW PC AND FLAGS
;<4.MONITOR>SCHED.MAC.140, 15-Nov-78 12:35:14, EDIT BY MILLER
;MAKE SURE PCS IS NOT LOST WHEN MENT0 IS INVOKED
;<4.MONITOR>SCHED.MAC.139, 15-Nov-78 12:22:30, EDIT BY MILLER
;MAKE SURE FFL CONTAINS PCS IN MENTU
;<4.MONITOR>SCHED.MAC.138, 3-Nov-78 17:22:49, EDIT BY MURPHY
;FIX ANCIENT ENTSKD BUG
;<4.MONITOR>SCHED.MAC.137, 2-Nov-78 11:05:12, EDIT BY MURPHY
;<MURPHY.MON>SCHED.MAC.23, 7-Dec-78 13:51:58, EDIT BY MURPHY
;NEW SWAP LOGIC
;<4.MONITOR>SCHED.MAC.136, 24-Oct-78 13:27:44, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.135, 23-Oct-78 15:21:29, EDIT BY MILLER
;ONE MORE CHANGE TO NEWST
;<4.MONITOR>SCHED.MAC.134, 23-Oct-78 13:43:13, EDIT BY MILLER
;FIX NEWST TO DO Q ADJUSTMENTS FOR CLASS SCHEDULER.
;<4.MONITOR>SCHED.MAC.133, 21-Oct-78 14:33:22, EDIT BY MILLER
;USE PSBUMP EVEN IF CLASS SCHEDULING ON
;<4.MONITOR>SCHED.MAC.132, 20-Oct-78 18:47:18, EDIT BY MILLER
;CHANGE CORFCT TO "ROUND-ROBIN" FORKS OF EQUAL PRIORITY
;<4.MONITOR>SCHED.MAC.131, 19-Oct-78 14:57:24, EDIT BY MILLER
;FIX SAVRT TO ALWAYS CALL GLREM AND GOCONC
;<4.MONITOR>SCHED.MAC.130, 9-Oct-78 09:09:34, EDIT BY MILLER
;PUT ERJMPS IN CODE TO REFERENCE USER PSI WORDS
;<4.MONITOR>SCHED.MAC.129, 1-Oct-78 22:16:47, EDIT BY DBELL
;TCO 4.2027 - SAVE TIME JOB STARTED IN SRTTIM
;<4.MONITOR>SCHED.MAC.128, 29-Sep-78 12:34:25, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.127, 29-Sep-78 10:11:21, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.126, 29-Sep-78 10:09:28, EDIT BY MILLER
;REMOVE VARIABLE PERIOD CODE FOR NOW
;<4.MONITOR>SCHED.MAC.125, 28-Sep-78 16:34:12, EDIT BY MILLER
;FIX NEWUTL SO PERIODS CAN BE VARIABLE
;<4.MONITOR>SCHED.MAC.124, 28-Sep-78 12:12:55, EDIT BY MILLER
;MAKE UTLEXP A VECTOR. ADD FIELD FOR NEWUTL SKIP COUNT
;<4.MONITOR>SCHED.MAC.123, 27-Sep-78 15:14:48, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.121, 27-Sep-78 11:28:39, EDIT BY MILLER
;FIX CORFCT TO DO COMPUTATION CORRECTLY
;<4.MONITOR>SCHED.MAC.120, 22-Sep-78 16:42:08, EDIT BY MILLER
;GET SCHEDULER'S STACK BEFORE GOING TO DISMSE AT PSIDF1
;<4.MONITOR>SCHED.MAC.119, 21-Sep-78 18:28:02, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.118, 20-Sep-78 11:28:20, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.117, 19-Sep-78 15:38:03, EDIT BY ENGEL
;MAKE THE "FULL" MESSAGE INTO "?FULL".
;<4.MONITOR>SCHED.MAC.116, 18-Sep-78 18:10:33, EDIT BY MILLER
;<MURPHY.MON>SCHED.MAC.5, 21-Sep-78 17:18:03, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.115, 18-Sep-78 12:18:15, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.114, 17-Sep-78 15:01:09, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.113, 17-Sep-78 14:13:18, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.112, 17-Sep-78 13:46:58, EDIT BY MILLER
;ADD FUNCTION TO READ CLASS PARAMETERS
;<4.MONITOR>SCHED.MAC.111, 16-Sep-78 15:34:42, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.110, 16-Sep-78 15:12:15, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.109, 16-Sep-78 15:05:34, EDIT BY MILLER
;ADD SKDLOG ROUTINE.
;<4.MONITOR>SCHED.MAC.108, 16-Sep-78 13:45:45, EDIT BY MILLER
;ADD MFRKWD DEF
;<4.MONITOR>SCHED.MAC.107, 16-Sep-78 13:17:46, EDIT BY MILLER
;ADD GTOKM TO "SET JOB CLASS" FUNCTION
;<4.MONITOR>SCHED.MAC.106, 16-Sep-78 12:58:08, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.105, 16-Sep-78 12:56:06, EDIT BY MILLER
;REWRITE SKED JSYS
;<4.MONITOR>SCHED.MAC.104, 15-Sep-78 12:09:36, EDIT BY MILLER
;FIX UP QUEUE TESTING IN AJBALS
;<4.MONITOR>SCHED.MAC.103, 15-Sep-78 11:00:16, EDIT BY MILLER
;ADD BATCH DREGS STUFF
;<4.MONITOR>SCHED.MAC.102, 14-Sep-78 17:24:25, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.99, 1-Sep-78 17:01:45, EDIT BY BOSACK
;<4.MONITOR>SCHED.MAC.98, 1-Sep-78 15:08:07, EDIT BY BOSACK
;CAUSE ERCAL TO NOT STORE FLAGS
;<4.MONITOR>SCHED.MAC.97, 1-Sep-78 13:45:24, EDIT BY BOSACK
;CAUSE ERJMP IN USER TO RETURN TO SECTION OF CALL
;<4.MONITOR>SCHED.MAC.96, 29-Aug-78 17:12:17, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.94, 27-Aug-78 13:05:29, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.93, 27-Aug-78 09:54:04, EDIT BY MILLER
;REMOVE TCDIV. ADD BATCH CLASS CODE
;<4.MONITOR>SCHED.MAC.92, 27-Aug-78 09:16:10, EDIT BY MILLER
;ADD BATCH CLASS WORD AND DEFAULT CLASS WORD
;<4.MONITOR>SCHED.MAC.91, 25-Aug-78 18:16:13, EDIT BY MURPHY
;REMOVE BALSET PARTITIONING, ADD DISASTER AVOIDANCE
;<MURPHY.MON>SCHED.MAC.3, 24-Aug-78 17:26:19, EDIT BY MURPHY
;GLOBAL PAGE AGING
;<4.MONITOR>SCHED.MAC.88, 25-Aug-78 08:25:36, EDIT BY MILLER
;MAKE CLASS COUNTS BE BASED ON LOGGED-IN JOBS
;<4.MONITOR>SCHED.MAC.87, 24-Aug-78 17:33:24, EDIT BY MILLER
;CLEAR CLASS COUNTS WHEN STARTING CLASS SCHEDULER
;<4.MONITOR>SCHED.MAC.86, 24-Aug-78 17:25:17, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.85, 24-Aug-78 12:57:58, EDIT BY MILLER
;FIX UP STARTING OF CLASS SCHEDULER
;<4.MONITOR>SCHED.MAC.84, 24-Aug-78 11:45:14, EDIT BY MILLER
;ADD SETCLS
;<4.MONITOR>SCHED.MAC.83, 23-Aug-78 08:22:30, EDIT BY MILLER
;CHANGE SAVRT NOT TO DEQUEUE AND REQUEUE PROCESS IF USING CLASS SCHEDULER
;<4.MONITOR>SCHED.MAC.82, 22-Aug-78 15:22:06, EDIT BY MILLER
;FIX UP CLASS DISTANCE COMPUTATION
;<4.MONITOR>SCHED.MAC.81, 21-Aug-78 08:43:42, EDIT BY MILLER
;FIX NEWST FOR CLASS SCHEDULING
;<4.MONITOR>SCHED.MAC.80, 18-Aug-78 13:44:47, EDIT BY HALL
;DO REORDR EACH TIME NEWUTL IS CALLED
;<4.MONITOR>SCHED.MAC.79, 15-Aug-78 16:59:28, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.78, 14-Aug-78 13:00:00, EDIT BY MILLER
;CLEAR CLSSUM AND CLSRJA WHEN CLASS SCHEDULER IS TURNED ON
;<4.MONITOR>SCHED.MAC.77, 14-Aug-78 12:17:55, EDIT BY MILLER
;ADD CLASS LOAD AVERAGE COMPUTATIONS. REWRITE DORJ1.
;<4.MONITOR>SCHED.MAC.76, 13-Aug-78 15:50:33, EDIT BY MILLER
;DON'T CALL PSBUMP IF DOING CLASS SCHEDULING
;<4.MONITOR>SCHED.MAC.75, 13-Aug-78 15:24:15, EDIT BY MILLER
;CLEAN UP CODE IN CLASS SCHEDULER.
;<4.MONITOR>SCHED.MAC.74, 13-Aug-78 12:30:32, EDIT BY MILLER
;FINISH REMOVING JOBQ
;<4.MONITOR>SCHED.MAC.73, 13-Aug-78 12:14:14, EDIT BY MILLER
;REMOVE JOBQ,CLSQ,CLSQI
;<4.MONITOR>SCHED.MAC.72, 12-Aug-78 13:38:31, EDIT BY MILLER
;DON'T INHIBIT LOAD OF FORK AT AJBCQS IF DOING CLASS SCHEDULING
;<4.MONITOR>SCHED.MAC.71, 12-Aug-78 12:52:38, EDIT BY MILLER
;DO CLSSHI UPDATES AT NEWUTL
;<4.MONITOR>SCHED.MAC.70, 12-Aug-78 10:53:52, EDIT BY MILLER
;REDO CLASS SCHEDULER. MAKE IT INDEPENDENT OF BALSET SCHEDULER
;<4.MONITOR>SCHED.MAC.69, 11-Aug-78 13:04:17, EDIT BY MILLER
;FIX GETJQ AND CORFCT
;<4.MONITOR>SCHED.MAC.68, 11-Aug-78 10:22:20, EDIT BY HALL
;FIX COUNT TO CALL ADJCLS IF COMPUTED COUNT IS DIFFERENT FROM OLD COUNT
;<4.MONITOR>SCHED.MAC.67, 11-Aug-78 08:15:22, EDIT BY MILLER
;fix typeo
;<4.MONITOR>SCHED.MAC.66, 11-Aug-78 08:05:39, EDIT BY MILLER
;FIX CLASS SCHEUDLER COMPUTATIONS
;<4.MONITOR>SCHED.MAC.65, 10-Aug-78 17:04:37, Edit by DBELL
;TCO 1905. PREVENT ZERO POINTER IN TLEINT FROM CAUSING RESBAD, ILLUUO BUGCHKS
;<4.MONITOR>SCHED.MAC.64, 3-Aug-78 11:02:49, EDIT BY MILLER
;FIX TYPEOS
;<4.MONITOR>SCHED.MAC.63, 3-Aug-78 08:37:58, EDIT BY MILLER
;<4.MONITOR>SCHED.MAC.62, 3-Aug-78 08:36:21, EDIT BY MILLER
;CHANGE COMPUTATION OF CLASS POPULATION
;<4.MONITOR>SCHED.MAC.61, 30-Jul-78 10:28:22, EDIT BY MILLER
;CHECK IN LOGOUT CODE FOR JOB IN A CLASS
;<4.MONITOR>SCHED.MAC.60, 25-Jul-78 15:23:20, EDIT BY MILLER
;FIX SKJFC2 NOT TO CALL GCCOR SO MANY TIMES
;<4.MONITOR>SCHED.MAC.59, 25-Jul-78 13:32:07, Edit by PORCHER
;TCO 1953 - FIX CHKERT ROUTINE TO CHECK ONLY OP/AC FOR ERJMP/ERCAL
;<4.MONITOR>SCHED.MAC.58, 18-Jul-78 15:04:28, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.56, 17-Jul-78 11:04:25, EDIT BY MILLER
;REMOVE "SCALING" CODE AT ONBSQ
;<4.MONITOR>SCHED.MAC.55, 14-Jul-78 11:41:26, EDIT BY MILLER
;MORE CLASS FIXES
;<4.MONITOR>SCHED.MAC.54, 14-Jul-78 08:44:34, EDIT BY MILLER
;CHANGE VALUE OF SKDBQC FOR BETTER PRECISION
;<4.MONITOR>SCHED.MAC.53, 13-Jul-78 20:53:00, EDIT BY MILLER
;MORE CLASS SCHEDULING CODE
;<4.MONITOR>SCHED.MAC.52, 12-Jul-78 16:45:14, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.51, 12-Jul-78 16:34:06, EDIT BY MILLER
;FIX UP CHECK AT SAVRT9
;<4.MONITOR>SCHED.MAC.50, 11-Jul-78 12:58:07, EDIT BY MILLER
;CHECK FKMNQ AT ALL PLACES WHERE QUEUE CHANGES.
;<4.MONITOR>SCHED.MAC.49, 10-Jul-78 13:34:32, EDIT BY MILLER
;ADD MORE MAXCLS
;<4.MONITOR>SCHED.MAC.48, 10-Jul-78 13:29:52, EDIT BY MILLER
;TCO 1938. ADD CLASS SCHEDULER CODE
;<4.MONITOR>SCHED.MAC.45, 6-Jul-78 07:31:29, EDIT BY MILLER
;MORE FIXED FOR TCO 1929. FIX CODE AT PRISET
;<4.MONITOR>SCHED.MAC.43, 1-Jul-78 12:08:12, EDIT BY MILLER
;REMOVE ONBSQN
;<4.MONITOR>SCHED.MAC.42, 1-Jul-78 12:07:43, EDIT BY MILLER
;RESTORE USE OF SK%BQR AND SK%BQE
;<4.MONITOR>SCHED.MAC.41, 30-Jun-78 16:40:29, EDIT BY MURPHY
;TCO #1930 - CRITICAL SECTION FACILITY
;<4.MONITOR>SCHED.MAC.38, 30-Jun-78 14:21:31, EDIT BY MILLER
;FIX CODE IN SAVRT TO INSURE QUEUE IS CORRECT IF QUEUE #'S SET
;<4.MONITOR>SCHED.MAC.36, 30-Jun-78 13:40:13, EDIT BY MILLER
;INITIALIZE FKQMX IN ASSFK
;<4.MONITOR>SCHED.MAC.35, 30-Jun-78 13:35:20, EDIT BY MILLER
;MORE FIXES TO QUEUE NUMBERS
;<4.MONITOR>SCHED.MAC.34, 30-Jun-78 11:06:42, EDIT BY MILLER
;CHECK FKMNQ AT NEWST3
;<4.MONITOR>SCHED.MAC.27, 23-Jun-78 17:59:36, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.23, 20-Jun-78 13:13:55, EDIT BY MILLER
;FIX UP ALL XJRSTFS TO PRESERVE FLAGS. CHANGE MJRST1 TO USE JRST @
;<1BOSACK>SCHED.MAC.1001, 5-Jun-78 21:38:18, EDIT BY BOSACK
;<1BOSACK>SCHED.MAC.1000, 5-Jun-78 19:02:46, EDIT BY BOSACK
;<4.MONITOR>SCHED.MAC.21, 19-Jun-78 17:17:41, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.20, 19-Jun-78 13:50:46, Edit by MCLEAN
;ADD GOKFRE FOR GETOK JSYS TCO 1908
;<3A.MONITOR>SCHED.MAC.8, 12-Jun-78 10:07:17, EDIT BY MILLER
;TCO 1894. MAKE SURE CTY OUTPUT IS STARTED AT SWHLT3
;<4.MONITOR>SCHED.MAC.18, 8-Jun-78 09:12:45, EDIT BY MILLER
;FIX ITRSIM TO DO SPECIAL HANDLING OF MONITOR CALLS. (SEE NOTE)
;<3A.MONITOR>SCHED.MAC.7, 7-Jun-78 07:58:15, EDIT BY MILLER
;FIX DISMS JSYS
;<3A.MONITOR>SCHED.MAC.6, 7-Jun-78 07:56:41, EDIT BY MILLER
;ALLOW HDISMS OF ARBITRARY TIME
;<4.MONITOR>SCHED.MAC.16, 17-May-78 17:12:28, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.15, 16-May-78 16:49:29, EDIT BY MURPHY
;<4.MONITOR>SCHED.MAC.14, 16-May-78 14:32:36, EDIT BY MURPHY
;<MURPHY.MON>SCHED.MAC.8, 16-May-78 13:13:41, EDIT BY MURPHY
;TCO #1904 - WORKING SET SWAPPING
;<3A.MONITOR>SCHED.MAC.5, 24-Apr-78 17:20:54, EDIT BY MURPHY
;<3A.MONITOR>SCHED.MAC.4, 18-Apr-78 17:12:36, EDIT BY MURPHY
;<3A.MONITOR>SCHED.MAC.3, 13-Apr-78 15:09:47, EDIT BY MURPHY
;TCO #1901 - SCHEDULER CONTROLS FOR INTERACTIVE/COMPUTATIONAL BIAS
;<4.MONITOR>SCHED.MAC.10, 3-Apr-78 13:42:58, EDIT BY MILLER
;REMOVE 2 MS DELAY FROM SCHPRF
;<4.MONITOR>SCHED.MAC.9, 11-Mar-78 10:48:32, EDIT BY MILLER
;FIX UP REG USE IN RTG1
;<4.MONITOR>SCHED.MAC.8, 10-Mar-78 10:07:30, EDIT BY MILLER
;TCO 1889. CHECK JOBSKD AS WELL AS JOBBIT IN SAVRT
;<4.MONITOR>SCHED.MAC.7, 9-Mar-78 13:44:09, EDIT BY MILLER
;MAKE TERM INT FIELD IN FKINT BE 9 BITS. FREE UP 9 BITS FOR INTS
;<4.MONITOR>SCHED.MAC.6, 9-Mar-78 08:52:13, EDIT BY MILLER
;CLEAR "QUOTA EXCEEDED" BIT AT MRETN
;<4.MONITOR>SCHED.MAC.5, 21-Feb-78 14:59:24, Edit by HALL
;INITIALIZE JSAMX AT FKSET1
;<3.SM10-RELEASE-3>SCHED.MAC.6, 10-Feb-78 17:10:26, Edit by MCLEAN
;REMOVE LOW CORE DEFINITONS (SJOBD,SLITES AND SPRIJD) BECAUSE
;THEY ARE NEEDED SINCE THEY ARE NOT SAVED OR DESTROYED OVER
;RELOADS AND ALSO THEY ARE NOT CACHED.
;<4.MONITOR>SCHED.MAC.3, 1-Feb-78 11:11:39, EDIT BY MILLER
;ONE MORE FIX. CHECK FOR ERCAL AND ERJMP CORRECTLY
;<4.MONITOR>SCHED.MAC.2, 1-Feb-78 09:43:57, EDIT BY MILLER
;FIX ITRSIM TO ALLOW INDEXING/INDIRECTION ON ERJMP/ERCAL.
;<4.MONITOR>SCHED.MAC.1, 31-Jan-78 08:10:12, EDIT BY MILLER
;TCO 1880. REMOVE CALL TO SETOVF IN SKDJOB
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED
; OR COPIED IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
;
;COPYRIGHT (C) 1976,1977,1978,1979 BY DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
SEARCH PROLOG
TTITLE SCHED
; SCHEDULER - D. MURPHY
;SPECIAL AC DEFINITIONS USED HEREIN
DEFAC (FX,Q3) ;FORK INDEX
;LOCAL MACROS
;USED INTERNALLY BY SCHEDULER
;ENTER SCHEDULER CONTEXT
DEFINE ENTSKD<
SKIPE INSKED
CALL REEBUG ;;ALREADY IN SCHED, BUGHLT
AOS INSKED
XPCW ENSKR>
;LOCAL ITEMS IN STG.MAC
EXTN <N2CLKS,CLK2TM,LV8CHK,CLK2CL,SCHPF0>
EXTN <PAGDIF,ADJSWP,TSTFRP,HPSWRN>
;CLASS SCHEDULER EXTERNALS
EXTN <CLSSHR,CLSCNT,JOBIRT,CLSUTL,CLSDST,CLSSUM,CLSRJA>
EXTN <MJBUSE,UTLTIM,UTLINT,OLDSLD,CLASSF>
EXTN <JOBDST,JOBCLS,JOBUTL,CLSSHI,MAXCLS,CLSCTL,CLSIRT,WA>
DEFSTR (CLGLC,CLSCNT,17,18) ;COUNT OF PROCESSES ON GOLST FOR THIS CLASS
;LOWER CORE LOCATIONS FOR LITES DISPLAY
SHLTW==:30 ;SCHEDULER HALT REQUEST WORD
SCTLW==:20 ;SCHEDULER CONTROL WORD
MINNR==:4 ;MIN SIZE OF RPLQ FOR LOADING FORK
TRMINT==^D19 ;FORK TERMINATION CHANNEL
;ASSUMED WORKING SET SIZE (MINIMUM) FOR FORK WAKING UP AFTER LONG
;BLOCK.
MINWSS::^D10
;VALUES FOR DISASTER AVOIDANCE - USED ONLY IF SK%HQR = 1
;THESE ARE THE VALUES OF THE HQ LDAV AT WHICH AJNNLF WILL GO OFF AND ON
;RESPECTIVELY. AJNNLF PREVENTS NEW LQ FORKS FROM COMING INTO THE BALSET
;WHEN ON. THE TWO VALUES ARE SEPARATED SLIGHTLY TO PREVENT INSTABILITY.
HQLEV1::4.0 ;'OFF' VALUE FOR AJNNLF
HQLEV2::6.0 ;'ON' VALUE FOR AJNNLF
;THESE ARE THE VALUES OF THE HQ LDAV AT WHICH AJHQOF WILL GO OFF AND ON
;RESPECTIVELY. AJHQOF FORCES LQ FORKS OUT OF THE BALSET. AGAIN, TWO
;VALUES PREVENT INSTABILITY.
HQLEV3::6.0 ;'OFF' VALUE FOR AJHQOF
HQLEV4::9.0 ;'ON' VALUE FOR AJHQOF
;BASIC PERIODS
SKDSCY: ^D20 ;SHORT CYCLE
SKDLCY: ^D100 ;LONG CYCLE
AJBLCY: ^D1000 ;AJBALS CYCLE
SKDBQT: ^D200*NTMS ;BALSET RUN QUANTUM
MINQNT==^D10*NTMS ;MINMUM TIME BEFORE CHANGING ALARM
SMLSTM==^D10 ;ALARM CYCLE TO CATCH SMALL QUANTA
UTLTMI==^D1000 ;TIME PERIOD
UTLINI==3 ;# OF PERIODS IN A COMPUTE CYCLE
UTLEXP: 0.983471454 ;e-(1/60)
0.9672161 ;e-(2/60)
0.951229424 ;e-(3/60)
0.935506985 ;e-(4/60)
DEFSTR (SKPCT,JOBNAM,2,2) ;SKIP COUNT FOR NEWUTL
MXSKPS==3 ;MAX VALUE OF SKIP COUNT
;THE FOLLOWING MACROS AND COMPUTATIONS ARE NECESSARY DUE
;TO MACROS INABILITY TO PERFORM FLOATING POINT
;COMPUTATIONS.
RADIX 10
MINSHR==5 ;MIN % A SHARE MAY HAVE
MAXVAL==1000/MINSHR ;MAX BIAS FOR CLASS PRIORITY
;NOW SOME MACROS TO DO THE FP CONSTRUCTIONS
DEFINE FLTMIN (A) <
SHRMIN==0.00'A
>
DEFINE FLTMAX (A) <
MXBIAS==A'.0>
;NOW PRODUCE THE VALUES
FLTMIN (\MINSHR) ;FP REPRESENTATION OF MINSHR
FLTMAX (\MAXVAL) ;FP REPRESENTATION OF MAXVAL
RADIX 8 ;RETURN TO DEFAULT RADIX
;STANDARD VALUES FOR SCHEDULER INTERACTIVE/COMPUTATIONAL FLAGS
; ON A SCALE OF 0 - 9
REPEAT 0,< ;FOR REFERENCE ONLY - DEFINITIONS IN MONSYM
SK%CYT==:1B18 ;CYCLE TIME
SK%IOC==:1B19 ;IO QUANTUM CHARGE
SK%HT1==:1B20 ;LIMIT HOLD TIME IF 1
SK%HT2==:1B21 ;NO HOLD TIME AFTER SKIPPED FORK IF 1
SK%HQR==:1B22 ;HIGH QUEUE FORKS HAVE ABSOLUTE PRIORITY UNDER LOAD
SK%CL1==:1B23 ;USE NORMAL CORFCT WITH CLASS SKED IF 0
;24 NOT USED
SK%RSQ==1B25 ;QUICK RESCHEDULE ON WAKEUP EVENTS
SK%RQ1==:1B26 ;REQUEUE TO QUEUE 1
SK%TTP==:1B27 ;TTY PREFERENCE
SK%WCF==:1B28 ;WAIT CREDIT PROPORTIONAL TO LOAD AV
>
SKFLGV::BYTE (18) 0 (1) 1,0,1,1,1,1,1,1,1,1,1
BYTE (18) 0 (1) 1,0,1,1,1,1,1,1,1,1,1
BYTE (18) 0 (1) 1,0,1,1,1,1,1,0,1,1,1
BYTE (18) 0 (1) 1,0,1,1,1,1,1,0,1,1,1
BYTE (18) 0 (1) 1,0,1,0,1,1,1,0,1,1,1
BYTE (18) 0 (1) 1,0,1,0,1,1,1,0,1,1,1
BYTE (18) 0 (1) 1,0,1,0,0,1,1,0,1,1,1
BYTE (18) 0 (1) 1,0,1,0,0,1,1,0,1,1,1
BYTE (18) 0 (1) 1,0,1,0,0,1,1,0,1,1,0
BYTE (18) 0 (1) 1,0,1,0,0,1,1,0,1,1,0
SKFLDF: BYTE (18) 0 (1) 1,0,1,0,0,1,1,0,0,1,0 ;NORMAL DEFAULT
BYTE (18) 0 (1) 1,0,1,0,0,0,1,0,0,1,0
BYTE (18) 0 (1) 1,0,0,0,0,0,1,0,0,1,0
BYTE (18) 0 (1) 1,0,0,0,0,0,1,0,0,1,0
BYTE (18) 0 (1) 1,0,0,0,0,0,1,0,0,1,0
BYTE (18) 0 (1) 1,0,0,0,0,0,1,0,0,1,0
BYTE (18) 0 (1) 1,0,0,0,0,0,1,0,0,0,0
BYTE (18) 0 (1) 1,0,0,0,0,0,1,0,0,0,0
BYTE (18) 0 (1) 0,0,0,0,0,0,1,0,0,0,0
BYTE (18) 0 (1) 0,0,0,0,0,0,1,0,0,0,0
NSKFLV==:.-SKFLGV
;CLASS SCHEDULING STRUCTURE DEFS
DEFSTR (CLSBD,CLSCTL,0,1) ;BATCH JOBS TO DREGS QUEUE
DEFSTR (CLSDF,CLSCTL,9,9) ;DEFAULT CLASS
DEFSTR (CLSBT,CLSCTL,18,9) ;BATCH CLASS
DEFSTR (CLSAC,CLSCTL,19,1) ;IF ON, CLASS BY ACCOUNTS
DEFSTR (CLSKV,CLSCTL,25,6) ;CURRENT KNOB VALUE
DREGS==<LOWQ>B29+LOWQ+1 ;BATCH DREGS PRIORITY WORD
; Execute only information for JSYS trapping
SFEXO==1B1 ;EXECUTE ONLY BIT IN SYSFK
;SCHEDULER INITIALIZATION
SCDIN:: SETZM SYSIFG
SETZM PWRDWN
SETZM FACTSW ;INITIALIZE SYSTEM FLAGS WORD
SETZM RSKCHK+2 ;INSURE FLAGS WORD 0
MOVE F,SKFLDF ;SET DEFAULT CONTROL FLAGS
MOVEM F,SCHFLG
MOVE T1,[BUG (SCDUUO)]
MOVEM T1,MJRSTF ;INIT SCHEULER'S UUO DISPTACH TO BUGHLT
MOVEI T1,SKFLDF-SKFLGV+1 ;GET KNOB VALUE
STOR T1,CLSKV ;SAVE IT
SETOM WA ;INIT WINDFALL ALLOCATION
MOVE T1,[WA,,WA+1]
BLT T1,WA+MAXCLS-1 ;INIT ALL TO -1
MOVEI T1,UTLTMI*UTLINI ;DEFAULT INTERVAL FOR UTIL
MOVEM T1,UTLINT ;SET UP INTERVAL
SETZM UTLTIM ;WHEN TO COMPUTE UTILIZATION
MOVE T1,[RSKCH1] ;SETUP JSR DISPATCH
MOVEM T1,RSKCHK+3
MOVEI T1,JTLST ; Set up JSYS trap queue
MOVEM T1,JTLSTL
MOVE T1,[1B0+FKPT]
MOVEI 2,NFKS
CALL ILIST ;INIT FREE FORK LIST
HRRZM 1,FREFK
MOVEI 1,JOBPT
MOVEI 2,NJOBS
CALL ILIST
MOVEM 1,FREJOB ;INIT FREE JOB LIST
SETOM JOBRT
MOVE 1,[XWD JOBRT,JOBRT+1]
BLT 1,JOBRT+NJOBS-1
SETZM SCTLW
SETZM SHLTW
SETOM SCDRN1
SETOM FORKX
SETOM TADIDT
SETOM SSKED
MOVEM 1,INSKED
MOVX 1,SF%FAC!SF%CRD!SF%MS1
;INIT FACTSW TO FACT FILE ON
; AND ALLOW USERS TO CHANGE DIR PARAMETERS
; AND DO MESSAGE LEVEL 1 ONLY
IORM 1,FACTSW
MOVSI 1,(1B1)
MOVEM 1,CHKTIM ;PREVENT JOB 0 ALARM UNTIL INITIALIZED
;GENERATE LQWBAS TABLE
MOVEI T2,INTQ1 ;FIRST QUEUE TO DO
SCDIN0: FLTR T1,T2 ;GET FLOAT OF QUEUE NUMBER
FDVR T1,FLOWQ ;DO DIVIDE
FSBRI T1,(1.0) ;DO -(1-Q/LOWQ)
FDVRI T1,(10.0) ;COMPLETE COMPUTATION
MOVNM T1,LQWBAS-INTQ1(T2) ;STASH IT
ADDI T2,1 ;NEXT Q
CAIG T2,LOWQ ;ALL DONE?
JRST SCDIN0 ;NO. MORE THEN
CALLRET QBIAS ;SET UP BAIS QUANTUM TABLE
ILIST:: ADDI 1,-1(2)
HLLZM T1,0(T1) ;CLEAR END OF LIST
SOJLE 2,ILIST1 ; SIZE OF BLOCK IN 2
MOVEM 1,-1(1)
SUBI 1,1
SOJG 2,.-2
ILIST1: RET
SUBTTL Channel 7 Interrupt Routines
;CLOCK, POSSIBLE RESCHEDULING, OR START PROCESS FROM SCHEDULER
PISC7:: XWD PISC7R,.+1
CLSB SCDCHN ;ISB MUST BE EXPLICITLY CLEARED ON KI
SKIPN RSKCHK+1 ;CALL FROM RESKED CHECK?
IFSKP.
DMOVEM T1,PI7AC1 ;SAVE ACS
DMOVE T1,RSKCHK ;MOVE FLAGS AND PC TO USUAL PLACE
DMOVEM T1,PISC7R
SETZM RSKCHK+1 ;CLEAR INDICATOR
DMOVE T1,PI7AC1 ;RESTORE ACS
ENDIF.
SKIPN SKEDFC ;FORCED MEMORY CLEAR?
SKIPG SCKATM ;ALARM CLOCK?
AOS SKEDF3 ;YES
SKIPE SKEDF1 ;INITIATED BY SCHEDULER?
JRST SCDR ;YES, GO START PROCESS
SKIPG INSKED ;IN SCHEDULER NOW, OR
SKIPG SKEDF3 ;NO SCHEDULING REQUESTS?
XJEN PISC7R ;IGNORE INTERRUPT
SKIPE NSKED ;OK TO RESCHEDULE?
JRST SCDW ;NO, GO SET TRAP
SKIPGE UTLOCK ;ANY UNIT TESTING BEING DONE?
SKIPE SNPCNT ;ANY SNOOP BREAK POINTS INSERTED?
JRST CHKSNP ;YES, GO SEE IF PC IS INSIDE A BP
;Here to stop the current process
PISC7A:
DATAO PAG,SETMON ;SET MON CONTEXT
MOVEM 17,PAC+17 ;YES, SAVE PROCESS AC'S
MOVEI 17,PAC
BLT 17,PAC+16
DMOVE T1,PISC7R ;GET FLAGS AND PC
TXNE T1,UMODF ;MONITOR PC?
IFSKP.
HRRZ T3,T2 ;YES, AT POINT OF RETURN TO USER?
CAIN T3,GOUSR+1
HRRI T2,GOUSR ;YES, RE-EXECUTE DATAO PAG WHEN RESUMED
ENDIF.
DMOVEM T1,PFL
MOVE 1,RSKEDN ;RESET NOSKED TRAP
MOVEM 1,RSKED
AOS INSKED
JSP FX,KISSAV ;SAVE APR-DEPENDENT STUFF
XJEN [0
MSEC1,,SCHED0] ;GO DO THE MAIN SCHEDULER LOOP
;SET TRAP TO CAUSE INTERRUPT ON OKSKED
;Here when process can't be unscheduled now because it is in critical code,
;is NOSKED, or is in a SNOOP breakpoint. Set up RSKED to cause another
;interrupt when the process does XCT RSKED.
SCDW: MOVEM 1,RSKED
SKIPN PNSKDC ;NOSKED DUE TO DIAG?
JRST SCDW1 ;NO
XCT KEPALV ;YES, UPDATE KEEP-ALIVE COUNTER
MOVE 1,SKDSCY ;SET TO COME BACK SHORTLY
MOVEM 1,SCKATM ;CAUSE CHANNEL 7 INTERRUPT IN THIS TIME
SCDW1: MOVE 1,RSKEDT ;GET THE XPCW
EXCH 1,RSKED ;PROCESS WILL EXECUTE XPCW EVENTUALLY
XJEN PISC7R
;Possible contents of RSKED. RSKCHK points to RSKCH1.
RSKEDN: JFCL ;NO-TRAP CONTENTS OF RSKED
RSKEDT: XPCW RSKCHK ;TRAP CONTENTS OF RSKED
;HERE WHEN RESKED REQUEST WAITING AND PROGRAM DOES XCT RSKED
RSKCH1: ISB SCDCHN ;ENTER VIA INTERRUPT
JRST . ;WAIT FOR INTERRUPT TO HAPPEN
;CHECK IF PROCESS IS IN A SNOOP BREAK POINT
; IF YES, THEN THE PROCESS CANNOT BE STOPPED IN CASE BP IS REMOVED
CHKSNP: MOVEM T1,SNPSV1 ;SAVE AN AC FOR TEST
MOVE T1,PISC7R ;GET PC OF PROCESS BEING STOPPED
TLNE T1,(UMODF) ;IN USER MODE?
JRST CHKSN1 ;YES, OK TO STOP HIM THEN
HRRZ T1,PISC7R+1 ;PICK UP PC
CAIL T1,UTREP ;IN THE CRITICAL UTEST ROUTINE?
CAILE T1,UTREPE ;...
SKIPA ;NO
JRST CHKSN0 ;YES, DO NOT RESCHEDULE NOW
CAIL T1,SNPBPP ;IN BREAK POINT PAGES?
CAILE T1,SNPBPP+SNPBPS+SNPDPS-1
JRST CHKSN1 ;NOT IN BP PAGES, OK TO RESKED
CHKSN0: SKIPG T1,SCKATM ;DID WE MISS AN ALARM?
MOVEI T1,2 ;YES. SET IT TO A SMALL VALUE THEN
MOVEM T1,SCKATM ;MAKE SURE ALARM VALUE IS GOOD
MOVE T1,SNPSV1 ;RESTORE AC
JRST SCDW ;SET TRAPS AND CONTINUE PROCESS
CHKSN1: MOVE T1,SNPSV1 ;RESTORE AC
JRST PISC7A ;SAVE CONTEXT, STOP PROCESS
;SETUP AND RESUME PROCESS
;Here when SKEDF1 is set. Main scheduler path does this around SCHED4.
SCDR:
SETZM SKEDF1 ;CLEAR LOCAL FLAG
SETZM INSKED ;NO LONGER IN SCHEDULER
SETOM SSKED
JSP FX,KISLOD ;LOAD APR-DEPENDENT STUFF
MOVE 1,PFL ;GET FLAGS
TXNE 1,UMODF ;RETURNING TO USER OR MONITOR?
SKIPA 1,SETUSR ;USER, GET USER CONTEXT WORD
MOVE 1,SETMON ;GET MONITOR CONTEXT WORD
MOVEM 1,SETPAG ;SAVE FOR USE BELOW
SKIPG T1,SCKATM ;DID WE MISS AN ALARM?
MOVEI T1,2 ;YES. SET IT TO A SMALL VALUE THEN
MOVEM T1,SCKATM ;MAKE SURE ALARM VALUE IS GOOD
MOVSI 17,PAC ;RESTORE PROCESS AC'S
BLT 17,17
DATAO PAG,SETPAG ;SET AC BLOCKS
SKIPN NSKED ;RESUMING NOSKED PROCESS?
SKIPE CRSKED ;OR CSKED PROCESS?
SKIPA
XJEN PFL ;RUN PROCESS
AOS SKEDF3 ;YES, REMEMBER SCHEDULING NEEDED
MOVEM 1,RSKED ;SET DEFERRED SCHED TRAPS
MOVE 1,RSKEDT
EXCH 1,RSKED
XJEN PFL ;RUN PROCESS
SUBTTL Routines to Enter Scheduler
;VARIOUS WAYS OF ENTERING SCHEDULER
;JSYS HALTF - DISMISS FORK UNTIL INTERRUPT OR EXTERNALLY RESTARTED
.HALTF::MCENT
HALTF1:: ;FORK TERM
HALTX: CALL GETSFX ;GET SUPERIOR FORK INDEX
HRRI 1,HALTT
MOVSI T2,FHV1 ;SAY LOW PRIORITY WAIT
HDISMS
JRST MRETN ;IF CONTINUED
HALTT:: JRST 0(4) ;IDENTIFIABLE TEST FOR HALTED FORK
;SCHEDULING CONTROL MACROS
;NOSKED AND NOSKD1 EXECUTE A NOINT
;OKSKED AND OKSKD1 EXECUTE AN OKINT
;NOSKD1 - ENTERED VIA JSP CX,NOSK11
NOSKD0:: ;TAG FOR HISTORICAL REASONS
NOSK11::SKIPE INSKED
JRST 0(CX)
AOS INTDF
AOS NSKED
JRST 0(CX)
;OKSKD1 - ENTERED VIA JSP CX,OKSK11
OKSK11::
OKSKD0::SKIPE INSKED
JRST 0(CX)
SKIPG NSKED ; ARE WE REALLY NOSKED?
OKSKE1: BUG(OKSKBG,<<CX,ADR>>)
SOSG NSKED
XCT RSKED
XCT INTDFF
JRST 0(CX)
;CHECK FOR INTERRUPT PENDING ON THIS FORK
;MAY BE CALLED FROM SCHED CONTEXT
;PRESERVES ALL ACS
CKINT0::SAVEAC <FX>
SKIPL FX,FORKX ;GET CURRENT FORK
SKIPL FKINT(FX) ;PSI PENDING?
RET ;NO
AOS SKEDF3 ;YES, REQUEST RESKED
ISB SCDCHN
RET
;CRITICAL SECTION, BGN AND END
;INVOKED BY CSKED AND ECSKED MACROS
CRSKD0::SKIPE INSKED
JRST 0(CX)
NOINT ;IMPLIES NOINT ALSO
AOS CRSKED
JRST 0(CX)
ECSKD0::SKIPE INSKED
JRST 0(CX)
SOSG CRSKED ;NOW OUT OF ALL CRITICAL SECTIONS?
XCT RSKED ;YES, CHECK FOR DEFERRED RESCHEDULE
OKINT
JRST 0(CX)
;DISMISS WITH HOLD TIME--KEEP IN BALSET FOR SPECIFIED TIME BECAUSE
;BLOCK EXPECTED TO BE SATISFIED IN THAT TIME.
; 1/ USUAL DISMISS TEST
; 2/ HOLD TIME IN MILLISECONDS
;NORMALLY INVOKED VIA HDISMS(HT) MACRO
EDMSH:: ENTSKD ;ENTER SCHED
TXZ CX,EXFLBT ;MASK OFF FLAGS BITS IF SEC 0
MOVEM CX,PPC ;SAVE PC
MOVE CX,ENSKR ;FIND FLAGS
MOVEM CX,PFL ;SET FLAGS
JRST DISMSH ;JOIN REGULAR DISMISS BUT KEEP 2
;EXEC DISMISS - AC1 CONTAINS XWD DATA,TEST ROUTINE ADR
EDMS0:: ENTSKD ;ENTER SCHEDULER
TXZ CX,EXFLBT ;MASK OFF FLAGS INCASE SECTION 0
MOVEM CX,PPC ;RETURN BECOMES PROCESS PC
MOVE CX,ENSKR ;FIND FLAGS ON THIS CALL
MOVEM CX,PFL ;SAVE FLAGS
DISMSE: MOVE P,PI7P ;INIT SCHED STACK
MOVEI 2,0 ;SAY 0 HOLD TIME
SKIPE CRSKED ;CRITICAL SECTION?
MOVEI T2,^D200 ;YES, STAY IN BALSET FOR A WHILE
DISMSH: PUSH P,2 ;SAVE HOLD TIME
HRRZ T2,T1 ;GET ADR OF ROUTINE
SKIPN NSKED ;CHECK FOR BUGGY DISMISS
CAILE T2,RSCODZ ;CHECK FOR A NON-RESIDENT TEST ROUTINE
BUG(NSKDIS)
MOVEM 1,FKSTAT(FX) ;PUT IN TEST WORD
FRIBP2::CALL SAVRT ;(WATCH BPT TAG)
HRRZ 1,FKSTAT(FX)
CAIE 1,HALTT ;FORK TERMINATING?
CAIN 1,FORCTM
CALL SUPUNB ;YES, UNBLOCK SUPERIOR IF NECESSARY
MOVE T3,JOBNO ;GET JOB NUMBER
MOVE T3,JOBCLS(T3) ;GET COUNT OF GOLST PROCESSES
TLNN T3,777776 ;IS THIS HE LAST ONE?
SETZM JOBCK0 ;INIT MEASURING INTERVAL
POP P,2 ;RECOVER HOLD TIME
HLRZ T3,T2 ;GET WAIT PRIORITY
CAIN T3,0 ;GIVEN?
MOVEI T3,FHV3 ;NO, DEFAULT TO MIDDLE VAL
STOR T3,FKGOLN ;SAVE IT
HRRZ T2,T2
JUMPE 2,[CALL REMBSJ ;IF 0 HOLD TIME, REMOVE IMMEDIATELY
CALL GLREM ;REMOVE FROM GOLST
CALL WTCONC
SETOB FX,FORKX
JRST SCHED0]
MOVE 1,TODCLK
ANDI 1,377777
ADDI 1,0(2) ;CONSTRUCT SPECIAL TEST FOR HOLD TIME
MOVSI 1,0(1)
HRRI 1,DISMT
MOVEM 1,FKPGST(FX)
JRST SCHP3
;RESCHEDULE ON PAGE WAIT
;CALLED VIA JSP CX,SCHEDP
; T1/ Scheduler test
SCHEDP::TXZ CX,EXFLBT ;MASK OFF FLAGS INCASE SECTION 0
XSFM SKDFL ;STORE FLAGS
MOVEM CX,SKDPC ;STORE PC
ENTSKD
SCHP1: PUSH P,1
CALL SAVRT
POP P,1
MOVEM 1,FKPGST(FX) ;SAVE SCHEDULER TEST WORD
DMOVE 1,SKDFL ;GET FLAGS AND PC
DMOVEM 1,PFL ;SAVE THEM IN PSB
;Keep a record of PC's that call this routine
HRRZ T1,PPC
SKIPE NSKED ;BLOCK WHILE NOSKED?
CALL NBNSB ;YES, SAVE PC
;Here to complete the dismiss. FKPGST contains scheduler test word
SCHP3: MOVE 1,TODCLK ;REMEMBER TIME WAIT STARTED
MOVEM 1,FKNBW(FX)
AOS NBWT ;COUNT WAITING BALSET PROCESS
HRRZ T1,FKPGST(FX)
CAIE T1,SWPINT ;SWAP WAIT?
CAIN T1,SWPRT
AOS NBSWP ;YES, COUNT
MOVX T1,BSWTB
CALL SCHP2
JRST SCHED0
;RETAIN FORK IN BALSET, SET FLAGS, ETC.
;ACCEPTS:
; T1/ Flags to store into FKSWP
; CALL SCHEDR
;Returns +1: always
SCHP2: IORM T1,FKSWP(FX)
SKIPE NSKED
MOVEM FX,SSKED ;REMEMBER FORK NUMBER OF NOSKED FORK
SETOB FX,FORKX
RET
;DO OKSKED AND RESCHEDULE
SCHEDR::TXZ CX,EXFLBT ;CLEAR FLAGS INCASE SECTION 0
XSFM SKDFL ;SET FLAGS
MOVEM CX,SKDPC
ENTSKD
SOSGE NSKED
BUG(ILOKSK)
SOS INTDF ;FIX UP NOINT AS WELL
JRST SCHP1
;COMMON SCHEDULER ENTER ROUTINE, SAVE AC'S
; ** INSKED MUST BE NON-0 BEFORE THIS CALL **
ENSKED::MOVEM 17,PAC+17 ;SAVE PROCESS AC'S
MOVEI 17,PAC
BLT 17,PAC+16
JSP FX,KISSAV ;SAVE APR-DEPENDENT STUFF
MOVE FX,FORKX ;GET INDEX OF CURRENT FORK
MOVE P,PI7P ;GET PDL POINTER
CALL UPDTCK ;UPDATE TODCLK
DMOVE T1,PAC+1 ;RESTORE T1 AND T2
XJRSTF ENSKR
;Enter here from APRSRV handling overflow traps
KITRP1::MOVEM 1,KIMUEF ;SAVE CHANNEL NUMBER
ENTSKD ;ENTER SCHEDULER CONTEXT
MOVE 1,KIMUEF ;CHANNEL NUMBER
MOVE 2,FORKX
IFN. T1 ;FOUND ANYTHING?
CALL PSIRQ ;YES, REQUEST INTERRUPT
ENDIF.
DMOVE 1,KIMUFL
DMOVEM 1,PFL ;MOVE PC TO PSB
JRST SCHED0 ;GO TO SCHEDULER
;Several cases come here via CALL - like Charlie on the MTA, it never returns...
REEBUG: BUG(SKDCL1) ;SOME SORT OF DISMISS IN SCHED
;ROUTINE TO SAVE PC'S WHICH CAUSE NOSKED BLOCKS
;CALLED FROM PGRTRP ALSO
; T1/ PC TO SAVE
NBNSB:: HRLZ T4,NNSBE ;NEG NUMBER TABLE ENTRIES IN USE
JUMPGE T4,NBNS2 ;JUMP IF TABLE EMPTY
NBNS1: HLRZ T2,NSBTAB(T4)
CAMN T1,T2 ;ALREADY HAVE THIS PC?
JRST NBNS3 ;YES, JUST COUNT IT
AOBJN T4,NBNS1 ;CHECK ALL ENTRIES
NBNS2: CAIL T4,NNSBT ;TABLE FULL?
RET ;YES, CAN'T ADD NEW ENTRY
HRLZM T1,NSBTAB(T4) ;ADD NEW PC TO TABLE
MOVNI T2,1(T4) ;INCREMENT USE COUNT
MOVEM T2,NNSBE
NBNS3: AOS NSBTAB(T4) ;COUNT OCCURRANCES
RET
NNSBT==^D20 ;SIZE OF PC TABLE
RS NSBTAB,NNSBT ; PC,,COUNT
RS NNSBE,1 ;NUMBER OF ENTRIES IN USE
;INSTRUCTION TRAP - TRAP PC IN FPC, ASSUMED TO BE I +1
;Called via JSP T2,ITRAP1 (or JRST ITRAP) in process context
ITRAP1::MOVEM 1,LSTERR ;SAVE ERROR CODE GIVEN IN 1
MOVEM T2,LSTIPC ;SAVE LAST ITRAP PC
;Check for illegal conditions
ITRAP:: SKIPE INSKED
BUG(SKDTRP)
SKIPL FORKX ;NO FORK RUNNING, OR
CONSZ PI,177B27 ;PI IN PROGRESS?
BUG(PIITRP)
SKIPE NSKED ;CHECK FOR PROPER STATE
BUG(NOSKTR)
SETZM NSKED
SETZM CRSKED
SETOM TRAPC ;CLEAR FLAGS AND COUNTERS
SKIPGE SLOWF ;NOW IN SLOW CODE?
MCENTR ;NO, ENTER
DMOVE 1,KIMUU1 ;GET LAST USER MUUO
DMOVEM 1,UMUUOW ;SAVE AS TRAPPED INSTRUCTION
;Restore INTDF to state when JSYS was entered
MOVE P,MPP ;GET LAST STACK FRAME
MOVE Q2,-3(P) ;PREVIOUS CONTEXT INTDF
MOVEM Q2,INTDF
;Loop here if doing a nested JSYS and there is no ERJMP. If there is an ERJMP
;anywhere in the calling path (back to user), this will find it.
;Check for ERJMP or ERCAL. If found, set the PC to the new location and return
;from the JSYS.
ITRRT2: MOVE P,MPP
MOVE Q2,INTDF ;GET CURRENT CONTEXT INTDF
DMOVE T1,-1(P) ;GET PREV CONTEXT FLAGS AND PC
EXCH T1,T2 ;(IN PROPER ORDER)
TXNN T1,UMODF ;BACK TO USER?
CAMN Q2,-3(P) ;OR INTDF UNCHANGED?
SKIPA ;YES, OK
BUG(NOINTR)
CALL SETPCV ;SET PREVIOUS CONTEXT VARIABLES FOR ITRSIM
CALL ITRSIM ;SEE IF ERJMP/ERCAL
JRST ITRRT1 ;NO
MOVEM T3,-1(P) ;SET PC TO E OF ERJMP/ERCAL
JRST MRETN ;RETURN TO IT
;No ERJMP at this level. If nested JSYS, set PC to ITTRP2 above and return
;from the current JSYS.
; T1/flags
ITRRT1: MOVE T3,JOBBIT
IFXN. T3,LOGIOB ;IN LOGIN OR LOGOUT?
BUG(ITRLGO) ;YES, NOT GOOD
JRST MRETN ;RETURN QUIETLY AND HOPE FOR THE BEST
ENDIF.
TXNE T1,UMODF ;NOW TO TOP OF STACK?
JRST ITR2 ;YES, NO ERJMP SEEN
XMOVEI T2,ITRRT2 ;SET TO RETURN THROUGH MRETN
MOVEM T2,-1(P) ; TO LOOP ABOVE
JRST MRETN
;Got to top of stack without an ERJMP. Give an interrupt to the user.
ITR2: SKIPN CRSKED
SETZM INTDF ;SET TO 1 LEVEL NOINTERRUPT
MOVE 1,CHNSON
ANDCAM 1,PSIBW ;FLUSH PREVIOUS PANIC BREAKS
MOVEI 1,^D15 ;INITIATE CHANNEL 15 INTERRUPT
CALL PSIRQ0
CHKINT ;GET THE INTERRUPT "SEEN"
OKINT ;INTERRUPT SHOULD TAKE HERE
MOVE P,UPP ;RETURN TO USER IF CONTINUED
ADD P,BHC+3
JRST MRETN
;BLOCK UNTIL CONDITION SATISFIED
;BLOCK0 - STAYS IN BALSET, BLOCK1 - LEAVES BALSET
BLOCK0::SUBI CX,2 ;MAKE RETURN TO CALL-1
TXZ CX,EXFLBT ;CLEAR FLAGS INCASE SECTION 0
XSFM SKDFL ;STORE FLAGS
MOVEM CX,SKDPC
ENTSKD
CALL BLOCKS
JRST SCHP1
BLOCK1::ENTSKD
CALL BLOCKS
SUBI CX,2 ;MAKE RETURN TO CALL-1
TXZ CX,EXFLBT ;CLEAR FLAGS INCASE SECTION0
MOVEM CX,PPC ;RETURN BECOMES PROCESS PC
MOVE CX,ENSKR ;PICK UP CALLERS FLAGS
MOVEM CX,PFL
JRST DISMSE
BLOCKS: MOVNI 1,^D100*NTMS
ADDM T1,BSQNT ;CHARGE QUANTUM
MOVE 1,TODCLK
ANDI 1,377777
ADDI 1,^D1000 ;ADD 1000 MILLISECS
MOVSI 1,0(1)
HRRI 1,BLOCKW
RET
;SHORT WAIT TEST. RETURNS NUMBER OF MS LEFT TO WAIT
BLOCKM::JFCL ;SCHED TEST FOR .5 TO 64 SEC.
BLOCKW::MOVE 2,TODCLK ;SCHEDULER TEST, GET TIME
ANDI 2,377777
SUB 1,2 ;DESIRED - NOW = WAIT LEFT
BLK2: JUMPLE 1,1(4) ;NO WAIT TIME LEFT
CAIGE 1,200000 ;BIG DIFFERENCE?
JRST 0(4) ;NO, KEEP WAITING
SUBI 1,400000 ;YES, COMPENSATE FOR WRAPAROUND
JRST BLK2
;DISMISS UNTIL WORD .GE. 0
DISGE:: PUSH P,1
HRLI 1,DISGET ;GIVEN MON ADDRESS IN 1
DISXE: MOVS 1,1
MDISMS
POP P,1
RET
DISGET::SKIPGE 0(1)
JRST 0(4)
JRST 1(4)
;DISMISS UNTIL WORD .L. 0
DISL:: PUSH P,1
HRLI 1,DISLT
JRST DISXE
DISLT:: SKIPL 0(1)
JRST 0(4)
JRST 1(4)
;DISMISS UNTIL WORD .G. 0
DISG:: PUSH P,1
HRLI 1,DISGT
JRST DISXE
DISGT:: SKIPG 0(1)
JRST 0(4)
JRST 1(4)
;DISMISS UNTIL WORD .LE. 0
DISLE:: PUSH P,1
HRLI 1,DISLET
JRST DISXE
DISLET::SKIPLE 0(1)
JRST 0(4)
JRST 1(4)
;DISMISS UNTIL WORD .E. 0
DISE:: PUSH P,1
HRLI 1,DISET
JRST DISXE
DISET:: SKIPE 0(1)
JRST 0(4)
JRST 1(4)
;DISMISS UNTIL WORD .N. 0
DISN:: PUSH P,1
HRLI 1,DISNT
JRST DISXE
DISNT:: SKIPN 0(1)
JRST 0(4)
JRST 1(4)
SUBTTL Sleep and Wakeup JSYS's
;DISMISS FOR SPECIFIED TIME JSYS
.DISMS::MCENT
JUMPLE 1,MRETN
CAIL 1,100000 ;LONG OR SHORT TIME?
JRST TDIS1 ;LONG
MOVE 2,TODCLK
ANDI 2,377777
ADDI 2,0(1) ;COMPUTE TIME TO RESTART
CAIGE T1,^D200 ;VERY SHORT WAIT?
JRST [ MOVEI T1,BLOCKW ;YES, USE BLOCKW AND HDISMS
HRL T1,T2
HDISMS (200) ;HOLD FOR ENOUGH TIME
JRST MRETN]
CAIGE 1,^D2000 ;USE BLOCKW FOR WAIT .L. 2000 MS
SKIPE T1,[FHV4,,BLOCKW] ;SHORT WAIT, USE BLOCKW AND HIGHER PRIORITY
MOVE T1,[FHV2,,BLOCKM] ;BLOCKM AND LOWER PRIORITY
HLL T2,T1 ;PASS BLOCK PRIORITY
HRL T1,T2 ;SETUP TIME
HRRI T2,0 ;NO HOLD TIME
TDIS2: HDISMS ;DISMISS WITH SPECIFIED TEST
JRST MRETN
TDIS1: CALL SETBKT ;COMPUTE TEST DATA
HRRI 1,BLOCKT
MOVSI T2,FHV1 ;VERY LOW PRIORITY
JRST TDIS2 ;GO COMPLETE DISMISSAL
;ROUTINE TO COMPUTE BLOCKT TEST DATA FROM GIVEN TIME IN MS
; 1/ TIME IN MS
; CALL SETBKT
; RETURN +1: ALWAYS, 1/ TEST ARG FOR BLOCKT ,, 0
SETBKT::CAML 1,[400,,0] ;BELOW MAX TIME?
MOVSI 1,400 ;NO, SET TO MAX
MOVE 2,TODCLK ;COMPUTE TIME AT WHICH WAKEUP DUE
TLZ 2,777000 ; IN FORM USED BY BLOCKT
ADD 2,1
LSH 2,-^D10 ;ROUND TO 18-BIT VALUE
MOVSI 1,0(2)
RET
;SCHEDULER WAIT TEST FOR LONG WAIT
;RETURNS NUMBER OF MS LEFT TO WAIT
BLOCKT::LSH 1,^D10 ;RESTORE WAKEUP TIME TO FULL SIZE
MOVE 2,TODCLK ;GET TIME NOW
TLZ 2,777000
SUB 1,2 ;DESIRED-NOW = TIME LEFT TO WAIT
BLKT1: JUMPLE 1,1(4) ;WAKEUP IF NEGATIVE
CAMG 1,[XWD 400,0] ;VERY LARGE DIFFERENCE?
JRST 0(4) ;NO, KEEP WAITING
SUB 1,[XWD 1000,0] ;COMPENSATE FOR WRAPAROUND
JRST BLKT1 ;CHECK AGAIN
;TEMPORARY JSYS'S FOR INTERJOB COMMUNICATION
;HIBERNATE - BLOCK UNTIL SIGNAL OR SPECIFIED ELAPSED TIME
; 1/ 0,,TIME MAXIMUM BLOCK TIME IN SECONDS
; THIBR
; RETURN +1: NEVER
; RETURN +2: SIGNAL RECEIVED OR TIME EXPIRED
.THIBR:: MCENT
IMULI 1,^D1000 ;CONVERT SECONDS TO MS
CALL SETBKT ;COMPUTE TEST DATA FOR TIME
HRRI 1,HIBERT ;CONSTRUCT TEST WORD
MOVSI T2,FHV2 ;LOWER PRIORITY BLOCK
HDISMS
MOVE 1,JOBNO ;DISMISS SATISFIED, CLEAR WAKE BIT
MOVSI 2,(JWAKEF)
ANDCAM 2,JOBNAM(1)
SMRETN
;SCHEDULER TEST FOR HIBERNATING FORK
HIBERT::LOAD 2,FKJOBN ;GET JOB NUMBER FOR FORK
MOVSI 3,(JWAKEF)
TDNE 3,JOBNAM(2) ;SIGNAL RECEIVED?
JRST 1(4) ;YES, WAKEUP
JRST BLOCKT ;NO, GO TEST TIME
;WAKEUP - SEND SIGNAL TO JOB WHICH WILL BE SEEN BY THIBR
; 1/ 0,,JOB# NUMBER OF JOB TO BE AWAKENED
; TWAKE
; RETURN +1: BAD JOB NUMBER
; RETURN +2: SIGNAL SENT. DESTINATION JOB WILL BE AWAKENED
; IMMEDIATELY IF NOW IN THIBR OR AS SOON AS NEXT THIBR DONE
.TWAKE:: MCENT
MOVEI 1,0(1)
CAIGE 1,NJOBS ;JOB NUMBER WITHIN RANGE?
SKIPGE JOBRT(1) ;AND JOB EXISTS?
TWAKER: RETERR ATACX1 ;NO
HRRZ 2,JOBDIR(1) ;GET LOGIN DIRECTORY
JUMPE 2,TWAKER ;ERROR IF JOB NOT LOGGED IN
MOVSI 2,(JWAKEF)
IORM 2,JOBNAM(1) ;SEND SIGNAL
SMRETN
SUBTTL Null Job
;SCHEDULER
;'NULL' JOB - WAITS WHEN NO FORKS RUNNABLE
SCDNUL: NOP
SCDNL2: SKIPN PSKED ;CHANGES OF STATE?
SKIPE SKEDF3 ;SCHEDULING REQUESTS?
JRST SCDNL1 ;YES
JRST SCDNL2 ;NO
SCDNL1: CALL RDSIVL ;GET LAST INSKED INTERVAL
SKIPE NBSWP ;FORKS WAITING FOR SWAPPING?
JRST [ ADDM 1,SKDSWP ;YES, CHARGE SWAP-WAIT TIME
JRST SCDNL3] ;GO SCHEDULE
SKIPE NBPROC ;ANY RUNNABLE FORKS?
JRST [ ADDM T1,SKDFIL ;YES, ACCUMULATE OTHER BS WAITS
JRST SCDNL3]
ADDM 1,SKDIDL ;OTHERWISE CHARGE IDLE TIME
SCDNL3: JRST SCH0 ;GO SCHEDULE
;READ LAST IN-SCHEDULER INTERVAL FOR STATISTICS
;RETURNS +1,
; T1/ TIME IN HP UNITS SINCE ROUTINE LAST CALLED
; SKDLST/ VALUE OF HP TIME NOW
RDSIVL: JSP 4,MTIME ;READ HP CLOCK
MOVE 2,SKDLST ;GET LAST PREVIOUS READING OF HP CLOCK
MOVEM 1,SKDLST ;SET NEW LAST READING
SUB 1,2 ;COMPUTE TIME SPEND IN NULL JOB
CAIGE T1,0 ;OVERFLOW?
ADD T1,BASOVV ;YES, ADD CORRECTION
RET
SUBTTL Main Scheduler Loop
SCHED0::CONSZ PI,177B27 ;ANY PI IN PROGRESS?
BUG(PISKED)
;ENTER SECTION 1, BECAUSE CODE IN PAGEM THAT IS CALLED FROM HERE
;MUST REFERENCE DATA IN NON-ZERO SECTIONS
XJRSTF [0
MSEC1,,.+1] ;RUN IN SECTION 1
MOVE P,PI7P ;SETUP LOCAL PDL
SCH0: CALL UPDTCK ;UPDATE TODCLK
XCT KEPALV ;DO KEEP ALIVE
MOVE F,SCHFLG ;SETUP PERM FLAGS
SETZM SKEDF3 ;CLEAR SKED REQUEST
SKIPL FX,FORKX ;HAVE FORK SETUP?
CALL UCLOCK ;YES, UPDATE CLOCK
SKIPG SCKATM ;ALARM COUNTED DOWN TO 0?
CALL SCHUPC ;YES, UPDATE CLOCKS
SKIPGE FX,FORKX ;JOB TO CONTINUE?
CALL SKDJOB ;NO, GO SCHEDULE ONE
JUMPL FX,SCDNUL ;RUN 'NULL' JOB IF NO FORK TO CONTINUE
SKIPGE 1,FKINT(FX) ;PSI REQUEST PENDING?
JRST SCHED5 ;YES, GO CHECK IT
;Here when ready to start a process. Force a channel 7 interrupt, which will
;be processed at PISC7.
SCHED4: CALL UPDTCK ;UPDATE TODCLK
AOS SKEDF1 ;SET FLAG FOR CH7 ROUTINE
ISB SCDCHN ;LET IT START PROCESS
JRST . ;WAIT FOR PI TO START
;Fork had an interrupt pending. If possible, give it now.
SCHED5: TXNN T1,FKPSI1 ;PSI NOW BEING DEFERRED?
SKIPE NSKED ;OR NOSKED FORK?
JRST SCHED4 ;YES, CONTINUE CURRENT SEQUENCE
MOVX T1,FKPSI1 ;CLEAR WORD EXCEPT FOR PI IN PROG
EXCH 1,FKINT(FX)
MOVEM 1,PIMSK ;PASS REQUEST WORD TO SERVICE ROUTINE
DMOVE T1,PFL ;SAVE PROCESS PC FOR PSI HANDLER
DMOVEM T1,PIFL
DMOVE T1,[PCU ;SET PPC TO START PSI HANDLER
MSEC1,,PIRQ]
DMOVEM T1,PFL
JRST SCHED4 ;GO START PROCESS
;PERIODIC UPDATE AND CHECK CLOCKS
SCHUPC: SKIPGE FX,FORKX ;HAVE RUNNING FORK?
JRST SKDLV8 ;NO
SKIPG BSQNT ;QUANT EXPIRED?
CALL DISMSJ ;YES
; ..
;ACTIONS DONE 'FREQUENTLY' -- EVERY 20 MS
SKDLV8: CALL RDSIVL ;READ LAST INTERVAL
MOVEM T1,SKDTHS ;ACCUMULATE SCHED TIME
MOVE FX,FORKX
MOVEM FX,LFORKX ;SAVE FORKX, MAKE IT BE -1 DURING BGND STUFF
SETOB FX,FORKX
CALL LV8CHK ;DO DEVICE-DEPENDENT THINGS
CALL TTCH7 ;TTY BIG BUFFER
MOVE F,SCHFLG ;RESTORE FLAGS (TTCH7 KNOWN TO CLOBBER)
CALL REMFPB ;CHECK DELETED PAGE QUEUE
MOVE FX,LFORKX ;RESTORE FORKX
MOVEM FX,FORKX
CALL RDSIVL ;READ LAST INTERVAL
ADDM T1,BGNDTM ;ACCUMULATE BACKGROUND OVERHEAD TIME
MOVN T1,SKDTHS ;RESET SCHED OVERHEAD TIME
ADDM T1,SKDLST
CALL CLKCHK ;CHECK FORKS WAITING FOR CLOCK
SKIPE TSKED ;TTY OUTPUT EVENTS?
CALL CHKTL ;YES, CHECK LIST
SKIPE PSKED ;WAKEUPS?
CALL DISMSJ ;YES
CALL SWTST ;CHECK POKE AND SWITCH REQUESTS
MOVE T1,TODCLK
CAML T1,TIM2 ;LONG CYCLE DUE?
CALL CLK2 ;YES
CALL BSBCK ;TIME TO CHECK WAITING BALSET FORKS
SKIPGE FX,FORKX
IFSKP.
CAME FX,LSTPFK ;SEE IF CONTEXT STILL SETUP
CALL SETPPG
MOVEM FX,LSTPFK
ENDIF.
MOVE F,SCHFLG ;BE SURE WE HAVE FLAGS
MOVE T1,SKDSCY ;SET CLOCK TO SHORT CYCLE TIME
TXNN F,SK%CYT ;NORMAL CYCLE TIMES?
ASH T1,2 ;NO, USE TIMES 4
MOVEM 1,SCKATM
RET
;SECOND PROCESS CLOCK, LESS PRECISE, UPDATES EVERY 100 MS
CLK2: CALL DISMSJ ;DISMISS CURRENT FORK, FORCE SKDJOB
MOVSI 1,(1B1)
SKIPL SCDRN1 ;RUNNING SPECIFIC JOB?
MOVEM 1,CHKTIM ;YES, DISABLE JOB 0 CHECK
MOVE 1,TODCLK
CAML 1,CHKTIM ;JOB 0 OVERDUE?
BUG(J0NRUN)
CALL SCLDAV ;UPDATE LOAD AVERAGES, ETC.
CALL RDSIVL
MOVEM T1,SKDTHS ;SAVE SCHED OVERHEAD TIME
;VARIOUS TIMERS AND CHECKS CAN GO HERE
CALL RCVCH7 ;CHECK RCVOK TIMER
MOVE F,SCHFLG ;BE SURE WE HAVE FLAGS
MOVE P5,SKDLCY
TXNN F,SK%CYT ;NORMAL CYCLE TIMES?
ASH P5,2 ;NO, USE TIMES 4
ADD P5,TODCLK ;COMPUTE NEXT TIME DUE
EXCH P5,TIM2 ;SET IT, GET OLD
SUB P5,TIM2 ;COMPUTE INTERVAL SINCE LAST UPDATE
MOVSI P4,-N2CLKS ;SET TO SCAN SECOND LEVEL CLOCKS
CLK21: ADDM P5,CLK2TM(P4) ;UPDATE CLOCK
SKIPG CLK2TM(P4) ;COUNTED OUT?
XCT CLK2CL(P4) ;YES, DO WHATEVER
AOBJN P4,CLK21
CALL RDSIVL ;READ LAST INTERVAL
ADDM T1,BGNDTM ;ACCUMULATE BACKGROUND OVERHEAD TIME
MOVN T1,SKDTHS ;RESET SCHED OVERHEAD TIME
ADDM T1,SKDLST
RET
PI7P:: IOWD NSKDP,SKDPDL
;CHECK LOAD AVS AND LITES
SCLDAV: MOVE T2,TODCLK
SUB T2,RJTTIM
CAIGE T2,^D100 ;TIME FOR UPDATE?
RET ;NO
MOVE T1,TODCLK ;YES, RESET START OF INTERVAL
MOVEM T1,RJTTIM
MOVE T1,NGOJOB ;UPDATE NGOJOB INTEGRAL
IMUL T1,T2
ADDM T1,RJTSUM
MOVE T1,NBPROC
IMUL T1,T2
ADDM T1,BSTSUM ;UPDATE NBPROC INTEGRAL
MOVE T1,NWSMEM
IMUL T1,T2
ADDM T1,NWSSUM ;UPDATE NWSMEM INTEGRAL
MOVE T1,SUMNR ;INTEGRATE SUMNR
IMUL T1,T2
ADDM T1,SNRSUM
MOVE T1,NRPLQ ;INTEGRATE NRPLQ
IMUL T1,T2
ADDM T1,RPQSUM
MOVE T1,NHQFK ;UPDATE HIGH-QUEUE FORKS INTEGRAL
IMUL T1,T2
ADDM T1,HQFSUM
MOVE T1,NLQFK ;UPDATE LOW-QUEUE FORKS INTEGRAL
IMUL T1,T2
ADDM T1,LQFSUM
SKIPE CLASSF ;DOING CLASS SCHEDULING?
CALL CLSAVG ;YES. INTEGRATE NRUN FOR THE CLASSES
MOVE 2,TODCLK
CAML 2,RJATIM ;TIME FOR RJAV UPDATE?
CALL DORJAV ;YES
MOVE T1,TODCLK ;GET NOW AGAIN
CAML T1,UTLTIM ;TIME TO DO CLASS UTILIZATION UPDATES?
CALL NEWUTL ;YES. DO IT NOW
MOVE T1,SKDIDL ;UPDATE MS VERSIONS OF HP CLOCKS
IDIVI T1,NTMS
MOVEM T1,SKDTM0
MOVE T1,SKDSWP
IDIVI T1,NTMS
MOVEM T1,SKDTM1
MOVE T1,SKDOVH
IDIVI T1,NTMS
MOVEM T1,SKDTM2
RET
;UPDATE RUNNABLE JOB AVERAGES
DORJAV: MOVEI T1,^D1000 ;SET TIME FOR NEXT UPDATE
ADDM T1,RJATIM
MOVE T1,RJTSUM ;DO TOTAL AVERAGES
SUBM T1,RJAVS1
EXCH T1,RJAVS1
MOVEI T2,RJAV ;TABLE AT RJAV
CALL DORJ1
MOVE T1,HQFSUM ;DO HIGH-QUEUE AVERAGES
SUBM T1,RJAVS2
EXCH T1,RJAVS2
MOVEI T2,HQLAV ;TABLE AT HQLAV
CALL DORJ1
MOVE T1,LQFSUM ;DO LOW-QUEUE AVERAGES
SUBM T1,RJAVS3
EXCH T1,RJAVS3
MOVEI T2,LQLAV ;TABLE AT LQLAV
CALL DORJ1
SKIPE CLASSF ;DOING CLASS SCHEDULING?
CALL CLDRJ ;YES. COMPUTE LOAD AVGS FOR THE CLASSES
FIXR T1,RJAV ;GET INTEGER 1 MIN AVERAGE
MOVEM T1,IRJAV
RET
;RUN AVERAGE ROUTINES FOR THE CLASS SCHEDULER
;ROUTINE TO COMPUTE INTEGRALS FOR EACH OF THE CLASSES
; T2/ TIME INTERVAL
CLSAVG: MOVEI T3,MAXCLS-1 ;SCAN ALL CLASSES
CLSAV0: LOAD T1,CLGLC,(T3) ;GET GOLST POPULATION
IMUL T1,T2 ;COMPUTE N*dt
ADDM T1,CLSSUM(T3) ;ACCUMULATE INTEGRAL
CLSAV1: SOJGE T3,CLSAV0 ;DO ALL CLASSES
RET ;DONE
;ROUITNE TO COMPUTE RUN AVGS FOR THE CLASSES
CLDRJ: SAVEAC <Q1> ;GET A WORK REG
MOVEI Q1,MAXCLS-1 ;SCAN ALL CLASSES
JFOV .+1 ;CLEAR OVERFLOW FLAG
CLDRJ0: FLTR T1,CLSSUM(Q1) ;GET INTEGRAL
MOVE T2,CLSSHR(Q1) ;GET SHARE
CAMGE T2,CLSUTL(Q1) ;GOT ANY WINDFALL?
MOVE T2,CLSUTL(Q1) ;YES. USE UTIL THEN
FDVR T1,T2 ;SCALE
JFOV [ FLTR T1,CLSSUM(Q1) ;IF OVERFLOW, USE SUM AS INTEGRAL
JRST .+1] ;AND PROCEED
SETZM CLSSUM(Q1) ;NO SUM NOW
MOVEI T2,0(Q1) ;GET CLASS
IMULI T2,NRJAVS ;FIND N-WORD CHUNK FOR THIS CLASS
ADDI T2,CLSRJA ;THE AREA
CALL DORJ2 ;COMPUTE AVERAGES
CLDRJ1: SOJGE Q1,CLDRJ0 ;DO ALL CLASSES
RET ;DONE
;COMPUTE ONE SET AVERAGES
; T1/ INTEGRAL OVER LAST ONE SECOND
; T2/ TABLE TO BE UPDATED
DORJ1: FLTR T1,T1 ;FLOAT INTEGRAL
DORJ2: FDVRI T1,(1000.0) ;DIVIDE BY 1 SECOND
JFOV .+1 ;CLEAR OV FLAG
MOVSI T3,-NRJAVS ;NUMBER ITEMS IN TABLE
HRLI T2,T3+(IFIW) ;SETUP INDIRECT ADDRESS
SCHC1: MOVE T4,@T2 ;GET PRESENT SUM
FSBR T4,T1 ;COMPUTE SUM-TERM
FMPR T4,EXPFF(T3) ;COMPUTE (SUM-TERM)*e(-T/C)
JFOV [ SETZM T4 ;IF UNDERFLOW, ASSUME ZERO
JRST .+1]
FADR T4,T1 ;SUM=(SUM-TERM)e-(T/C)+TERM
MOVEM T4,@T2 ;NEW SUM
AOBJN T3,SCHC1 ;DO ALL TABLE
RET
;TABLE OF EXP(-T/C) FOR T = 1 SEC.
EXPFF: EXP 0.983471454 ;C = 1 MIN
EXP 0.996672216 ;C = 5 MIN
EXP 0.998889506 ;C = 15 MIN
;TABLE OF 1-EXP(-T/C) FOR T = 1 SEC
REPEAT 0,< ;DON'T NEED THIS NOW
EXPGF: EXP 0.0165285462 ;C = 1 MIN
EXP 0.00332778395 ;C = 5 MIN
EXP 0.00111049406 ;C = 15 MIN
> ;END OF REPEAT 0
;TEST WORD DEPOSITED BY SWITCHES IN 20 OR 30
;ACCEPTS:
;Location 20/
; Bit 0 - go to EDDT breakpoint
; Bit 3 - wait for DDMP to finish
; Bit 34 - reset the front end
; Bit 35 - same as bit 0
;Location 30/
; non-zero to request shutdown of system
; CALL SWTST
SWTST: SKIPE PWRDWN ;POWER DOWN?
JRST SCHPRF ;YES
SKIPE SHLTW ;HALT REQUEST?
JRST SWCRSH ;YES
SKIPN T1,SCTLW ;SWITCHES?
RET ;NO, NOTHING TO DO
SETZM SCTLW
JFFO 1,.+1
CAIGE 2,NSWTT
XCT SWTT(2)
TXNE T1,1B35 ;ALTERNATE MANUAL PAUSE?
JRST SWHLT ;YES
TXNE T1,1B34 ;RESET PROTOCOL?
JRST SWRS11 ;YES
SWTST1: RET
SWTT: JRST SWHLT ;HALT T.S.
JRST SWTST1 ;NOT USED
JRST SWTST1 ;NOT USED
JRST SCWAIT ;INTERNALLY GENERATED - WAIT FOR DOWN
NSWTT==.-SWTT
SWHLT: CALL DISMSJ ;DISMISS CURRENT FORK
CALL SETPSK ;SET SCHED CONTEXT
SKIPE DDTPRS ;DDT LOADED?
SWHLT4: XCT CHKADR ;YES, GET BREAKPOINT
JRST SCHED0 ;RESUME SCHEDULER WHEN PROCEEDED
;POWER FAIL DETECTED
SCHPRF: CALL DISMSJ ;FLUSH CURRENT FORK
CALL SETPSK ;SET SCHED CONTEXT
XCT PWRFLE ;DO ANY SPECIAL POWER FAIL CODE
CALL CASHOF ;MAKE SURE MEMORY IS CORRECT
JRST SCHPF0 ;FINISH IN APRSRV
;RESET FE PROTOCOL
SWRS11: PIOFF
JSR BUGMON ;ENTER SECONDARY
JSR BUGPRI ;ENTER PRIMARY, SHOULD BE IN SYNCH NOW
PION
JRST SCHED0 ;CONTINUE
;Here when 30 is non-zero. Set bit 3 in 20, and start DDMP.
SWCRSH: SETZM SHLTW
MOVSI 1,(1B3) ;SETUP TO WAIT FOR DDMP COMPLETION
MOVEM 1,SCTLW
SETZM DDTIME ;POKE DDMP
AOS JB0FLG ;DO JOB 0
SETZ 1,
SWRUN2: MOVEM 1,SCDRN1 ;ALLOW ONLY THAT JOB TO RUN
CALL DISMSJ ;DISMISS CURRENT FORK
JRST SWTST1
;Here when bit 3 is set in 20. If DDMP is finished, proceed to hit breakpoint
;or halt processor
SCWAIT: SKIPN DDTIME ;DDMP FINISHED?
JRST [ MOVSI 1,(1B3) ;REISSUE REQUEST
MOVEM 1,SCTLW
JRST SWTST1]
CALL DISMSJ ;DISMISS CURRENT FORK IF ANY
CALL SETPSK ;SET SCHED CONTEXT
SKIPE IOIP ;WAIT FOR IO TO FINISH
JRST .-1
HRROI 1,[ASCIZ /**HALTED**
/]
MOVE 2,CTYLNO
CALL TTEMES ;ANNOUNCE HALT ON CTY
CALL STADYN ;POINT TO DYNAMIC DATA
JRST SWHLT5 ;NOT ACTIVE. SHOULDN'T HAPPEN
PUSH P,T2 ;SAVE DYNAMIC DATA ADDRESS
CALL TTCH7 ;MAKE SURE CTY OUPTUT IN PROGRESS
MOVE T2,0(P) ;GET DYNMAIC DATA ADDRESS
CALL TTSOBE ;SEE IF OUTPUT BUFFER IS EMPTY
JRST .-1 ;NOT YET. KEEP WAITING
POP P,T2 ;DON'T NEED THIS ANYMORE
SWHLT5: SKIPN DDTPRS ;DDT PRESENT?
JRST SWHLT2 ;NO, HALT PROCESSOR
SKIPN DBUGSW ;EXPECTING BREAKPOINTS?
SKIPE DCHKSW
JRST SWHLT4 ;YES, GET ONE
SWHLT2:
PIOFF ;STOP ALL INTERRUPTS
JSR BUGMON ;AND ENTER SECONDARY PROTOCOL
JRST 4,.+1 ;STOP HERE
JSR BUGPRI ;IF CONTINUES, RESTORE MACHINE
PION ;ALL OF IT
JRST SCHED0 ;AND RESUME SCHEDULER
;SCHEDULER REQUEST PROCESSOR
;MAY BE CALLED FROM SCHEDULER OR PROCESS CONTEXT
; T1/ DATA,,ADDRESS OF FUNCTION
; *MONUMENT*
;Once upon a time, this routine was called at interrupt level with
;several different arguments. At present, it is called only for
;JOBSRT and only in places where JOBSRT could be called directly.
;Therefore, this routine is now just a jacket for JOBSRT after
;verifying that the caller does indeed want JOBSRT.
SCDRQ7::SAVET
NOSKD1
HRRZ T2,T1 ;GET ROUTINE ADDRESS
CAIE T2,JOBSRT ;THE ONE LEGAL CASE?
BUG(SRQBAD)
HLRZ T1,T1 ;GET DATA
CALL 0(T2) ;DO IT
OKSKD1
RET
;SCHEDULER REQUESTS
;CREATE A JOB
; T1/ TERMINAL LINE NUMBER OR 0,,-2 IF CRJOB
JOBSRT::SAVEQ
CAMN T1,CTYLNO ;CTY?
JRST JOBSR2 ;YES, ALLOW IF AT ALL POSSIBLE
MOVE 2,SPTC ;CURRENT SPT COUNT
CAML 2,SPC1 ;ABOVE LOGIN LIMIT?
JRST [MOVE T3,[POINT 7,[ASCIZ\?FULL - No more SPT slots
\]]
JRST JOBSR1]
MOVE 2,DRMFRE
CAMG 2,DRMIN1 ;ENOUGH DRUM SPACE?
JRST [MOVE T3,[POINT 7,[ASCIZ\?FULL - No more swapping space
\]]
JRST JOBSR1]
JOBSR2: SAVEAC <Q1,Q2>
SKIPN FREJOB ;ROOM FOR NEW JOB
JRST [MOVE T3,[POINT 7,[ASCIZ\?FULL - No more job slots
\]]
JRST JOBSR1]
SKIPN FREFK ;AND NEW FORK?
JRST [MOVE T3,[POINT 7,[ASCIZ\?FULL - No more forks
\]]
JRST JOBSR1]
MOVE 2,@FREJOB ;ASSIGN JOB NUMBER
EXCH 2,FREJOB
SUBI 2,JOBPT
SETZM JOBRT(T2) ;JOB RUNTIME
SETZRO JOBRTP,(T2) ; No job runtime limit
SETZRO TIMCNT,(T2) ; and no clocks in use yet
SETZM JOBIRT(T2) ;NO INCREMENTAL RUN TIME YET
CAMLE T2,MJBUSE ;HIGHER JOB NUMBER?
MOVEM T2,MJBUSE ;YES
LOAD T3,CLSDF ;GET DEFAULT CLASS
HRRM T3,JOBCLS(T2) ;INIT TO DEFAULT CLASS
AOS CLSCNT(T3) ;COUNT THIS NEW JOB
MOVEM T1,Q1 ;SAVE TTY NUMBER
MOVEM T2,Q2 ;SAVE JOB NUMBER
CALL ASSFK ;GET A FORK IN FX
STOR FX,JBTFK,(Q2) ;SETUP TOP FORK FOR JOB
STOR Q1,JBTTY,(Q2) ;SETUP TTY FOR JOB
STOR Q2,FKJOBN ;LEAVE JOB NUMBER IN FORK
CALL ASFSB ;ASSIGN JSB
STOR 1,FKJSB
MOVE T1,Q1 ;TTY NUMBER
TXO T1,NEWJB%
IORM 1,FKINT(FX) ;LEAVE TTY NUMBER FOR STARTUP ROUTINE
CALLRET WTCONC ;PUT FORK ON WAIT LIST
;HERE WHEN CAN'T START THE JOB BECAUSE OF SOME SHORTAGE. SEND
;'FULL' TO THE LINE
JOBSR1: TXNE T1,1B18 ;NEGATIVE LINE NUMBER?
JRST JOBSRC ;YES, CRJOB
MOVE T2,T1
MOVE T1,T3 ;GET POINTER TO MESSAGE
PUSH P,2 ;SAVE
CALL TTABRT ;CONDITION LINE FOR TTEMES
CALL TTEMES ;GIVE USER BAD NEWS
POP P,1 ;GET LINE NUMBER
CALL CHKPTY ;IS THIS A PTY
SKIPA ;NO - DONE
CALL PTYFIN ;YES - MAKE IT HUNGRY
RET
JOBSRC: MOVEI T1,CRJBX6 ;SYSTEM FULL ERROR CODE
MOVEM T1,CRJANS ;ANSWER TO OTHER JOB
RET
;ASSIGN FORK SLOT
ASSFK:: MOVE F,SCHFLG
HRRZ FX,@FREFK
EXCH FX,FREFK ;GET FORK, UPDATE LIST
SUBI FX,FKPT
SETZM FKQ2(FX) ;INIT FLAGS AND Q VALUES
MOVEI 1,JSKP
MOVEM 1,FKSTAT(FX) ;INIT STATUS
CALL INIQ ;GET INITIAL QUEUE FOR FORK
STOR T1,FKQN
MOVE T1,QUANTT(T1) ;GET QUANTUM FOR IT
STOR 1,FKQTM ;ESTABLISH QUEUE
MOVE 1,TODCLK
MOVEM 1,FKTIME(FX)
MOVX 1,FKPSI0+NEWFK%
MOVEM 1,FKINT(FX) ;LEAVE INTERRUPT REQUEST
SETONE PIBMP ;BE SURE IT RUNS ASAP
SETZM FKSWP(FX)
SETZM FKPT(FX)
SETZM FKINTB(FX)
SETZM FKPGS(FX) ;CLEAR PT AND PSB WORD
SETZM FKCNO(FX)
SETZM FKJOB(FX)
SETZM FKWSP(FX)
MOVE 1,[XWD 100100,3] ;INIT AGE TO 100, W.S. TO 3
MOVEM 1,FKNR(FX)
CALL ASFSB ;ASSIGN PSB
STOR 1,FKPSB
CALL ASFSB ;ASSIGN UPT
STOR 1,FKUPT
CALL ASFSB ;GET ONE FOR THE STACK PAGE
STOR T1,FSSPTN ;SAVE IT
RET
;PROCESSOR INTERRUPTS REFERRED FROM APR PI SERVICE
MPEINT: MOVEI 2,.ICDAE ;GIVES I/O ERROR INTERRUPT
EXCH 1,2 ;FORK NUMBER LEFT BY APR ROUTINE
CALL PSIRQ
RET
;BALANCE SET SCHEDULER
;CALLED TO SELECT JOB TO RUN
SKDJOB: SETZM PSKED
MOVE T1,NBWT ;NUMBER BALSET FORKS NOW WAITING
CAML T1,NBPROC ;LESS THAN NUMBER IN BALSET?
CALL BSBCK ;NO, ALL ARE WAITING. TEST ALL.
HRRZ FX,GOLST ;SCAN GOLST FOR FORK TO RUN
SKCB5: JUMPE FX,BKGND1 ;NO RUNNABLE FORK
SUBI FX,FKPT ;GET FORK INDEX
MOVE T1,FKSWP(FX) ;GET SWAP FLAGS
TXNE T1,FKWSL ;NOT LOADED?
TXNE T1,BSWTB ;OR BLOCKED?
JRST SKCB2 ;YES, CAN'T RUN IT
SKIPL T1,SSKED ;HAVE A NOSKED FORK?
CAIN FX,0(T1) ;YES, THIS ONE?
JRST SKDJ2 ;OK TO RUN THIS FORK
SKCB2: HRRZ FX,FKPT(FX) ;CAN'T RUN THIS FORK, GET NEXT IN LIST
JRST SKCB5
;HAVE RUNNABLE FORK - SET IT UP AND RUN IT
SKDJ2: AOS NCSWCH ;COUNT CONTEXT SWITCHES
MOVEM FX,FORKX
CAME FX,LSTPFK ;SAME AS LAST FORK LOADED?
CALL SETPPG ;SETUP PAGER FOR THIS PROCESS
MOVEM FX,LSTPFK ;REMEMBER LAST FORK LOADED
LOAD T3,FKQTM ;SETUP QUANTUM FOR THIS RUN
MOVEM T3,BSQNT
MOVEM T3,BSQNT0
SETZM FKT1 ;CLEAR INCREMENTAL TIME
CALL XGCCHK ;CHECK FOR XGC NEEDED
RET ;DONE
;CHECK ALL WAITING BALSET FORKS
BSBCK: SKIPL FORKX ;HAVE FORK SETUP?
JRST BSBCK0 ;YES, NO SWAPS NOW
SKIPN SKEDFC ;FORCED CLEAR REQUESTED?
IFSKP.
SKIPGE SSKED ;YES, A NOSKED FORK?
JRST SKDJFC ;NO, OK TO DO
ENDIF. ;YES, CAN'T DO IT NOW
CALL TSTBAL ;TEST AND ADJUST BALSET IF NECESSARY
CALL WSMCHK ;DO PERIODIC WS MGT
BSBCK0: HRRZ FX,GOLST
BSBCK1: JUMPE FX,R ;DONE
SUBI FX,FKPT
MOVE T1,FKSWP(FX)
TXNE T1,FKWSL ;NOT LOADED?
TXNN T1,BSWTB ;OR NOT WAITING?
JRST BSBCK2 ;YES, SKIP IT
CALL SKDJ3 ;TEST IT
NOP
BSBCK2: HRRZ FX,FKPT(FX) ;STEP LIST
JRST BSBCK1
;FOUND NO FORK TO RUN
BKGND1: CALL UPDTCK ;UPDATE TODCLK
SKIPE NBPROC ;BALSET EMPTY?
JRST [ CALL WTCHK ;NO, CHECK WAIT LIST ONLY
JRST BKGND2]
CALL SKDLV8 ;DO ALL BACKGROUND STUFF
CALL CLK2
CALL WTCHK ;CHECK WAITING FORKS
SETZM QSKED
CALL AJBALS ;CHECK BALSET
BKGND2: SETO FX, ;NOTE NO FORK TO RUN
RET
;HERE TO FORCE UNLOAD OF BALSET AND COLLECT ALL OF MEMORY THAT
;ISNT ACTUALLY LOCKED
SKDJFC: MOVSI FX,-NFKS
SKJFC1: TMNE FKIBS ;IS THIS FORK IN THE BALANCE SET?
CALL CLRIBS ;YES. REMOVE IT
JE FKWSL,,SKJFC3 ;JUMP IF WS NOT LOADED
CALL REMWS ;REMOVE IT
SKJFC3: AOBJN FX,SKJFC1
;HERE WHEN BALSET UNLOADED, FORCE GCCOR TO FREE MEMORY. GCCOR TAKES
;NOTE OF SKEDFC
SKJFC2: CALL GCCOR ;GETS PRIVATE PAGES AND SPT PAGES
SETOM LSTPFK ;NOTE PAGER CONTEXT INVALID
SETZM SKEDFC ;CLEAR BLUNDERBUSS FLAG
JRST SKDJOB ;AND TRY AGAIN.
;TEST WAITING BALSET FORK
SKDJ3: HRRZ 2,FKPGST(FX)
HLRZ 1,FKPGST(FX) ;SETUP TEST DATA
JSP 4,0(2) ;CALL TEST ROUTINE
JRST SKDJW ;STILL WAITING
DISMT3: CALL DISACC ;ACCOUNT FOR WAIT
HRRZ 1,FKPGST(FX)
CAIN T1,PRELWT ;PRELOAD WAIT?
JRST SKDJS2 ;WAIT SOME MORE
CAIE 1,SWPINT ;WAS BEING LOADED?
RETSKP ;NO, RETURN RUNNABLE
TMNN PIBMP ;RETURNING TO NORMAL PROCESSING?
SKIPN PRELDF ;PRELOADING DESIRED?
JRST SKDJS1 ;NO
SKDJS2: MOVE T1,NRPLQ ;SAVE NUMBER PAGES NOW AVAIL
ADD T1,IOIP
PUSH P,T1
CALL PRELD ;TRY TO PRELOAD
JRST [ SETONE BSWTB ;NOT COMPLETE, PUT FORK BACK INTO WAIT
MOVEM T1,FKPGST(FX) ;WAIT TEST RETURNED BY PRELD
AOS NBWT ;COUNT IT
AOS NBSWP ; AS SWAP WAIT
MOVE 1,TODCLK ;RESET TIME OF START OF WAIT
MOVEM 1,FKNBW(FX)
POP P,T1
SUB T1,NRPLQ ;COMPUTE NUMBER PAGES USED FOR LOAD
SUB T1,IOIP
LOAD T2,FKNWCE ;GET PRELOAD RESERVE
CAMGE T2,T1 ;GREATER THAN NUMBER LOADED?
MOVE T1,T2 ;NO, LIMIT
SUB T2,T1 ;REDUCE RESERVE BY AMT LOADED
STOR T2,FKNWCE
MOVN T1,T1 ;REDUCE TOTAL RESERVE
ADDM T1,NRPMIN
JRST SKDJW]
POP P,T1 ;FLUSH TEMP
SKDJS1: CALL SOSNEB ;PROCESS FINISHED ENTERING BALSET
RETSKP ;RETURN RUNNABLE
SKDJW: RET ;RETURN NOSKIP, FORK STILL WAITING
;ACCOUNT FOR BALSET WAIT ON COMPLETION
DISACC: SETZRO BSWTB ;CLEAR WAIT
SOS NBWT ;NOW ONE LESS WAITING PROCESS
MOVE 1,TODCLK ;COMPUTE LENGTH OF TIME WAITED
SUB 1,FKNBW(FX)
HRRZ 2,FKPGST(FX) ;WAIT TEST ADR
ADDM 1,BSWT ;ACCUMULATE TOTAL WAIT
CAIN T2,PRELWT ;PRELOAD WAIT?
JRST DISAC2 ;YES, HANDLE LIKE SWAP WAIT
CAIE 2,SWPINT ;SWAPIN?
CAIN 2,SWPRT ;OR SWAP?
DISAC2: JRST [ ADDM T1,DRMWT ;YES, CHARGE TO DRUM
SOS NBSWP ;REDUCE COUNT OF SWAP WAITS
CAIN T2,SWPRT ;SWAP-IN?
CALL CHGHLS ;YES. DO CHARGING THEN
JRST DISAC1]
CAIN T2,DWRTST ;WRITE WAIT?
JRST [ ADDM T1,DWRWT ;YES, CHARGE IT
JRST DISMT5]
CAIE 2,UDWDON ;UTILITY DSK? OR
CAIN 2,DSKRT ;DSK?
SKIPA ;YES
JRST DISAC1 ;NO, NO CHARGE TO QUANTUM
ADDM 1,DSKWT ;CHARGE TO DSK
DISMT5: TXNE F,SK%IOC ;QUANTUM CHARGE FOR IO?
JRST DISAC1 ;NO
MOVEI T1,^D10*NTMS ;NOMINAL QUANTUM CHARGE
LOAD 3,FKQTM ;CHARGE AGAINST REGULAR QUANTUM
CAIG T3,0(T1) ;WILL RESULT BE POSITIVE?
MOVEI T3,1(T1) ;NO. FORCE IT TO BE SO
SUB 3,1
STOR 3,FKQTM
CALL CHGHLF ;CHARGE FOR FILE READ
DISAC1: RET
;CHARGE HOLD TIME FOR FAULT
;ENTRY FOR SWAP READ
CHGHLS: MOVEI T1,2 ;ASSUME SMALL CHARGE
SKIPE PRELDF ;PRELOADING WS?
;ENTRY FOR FILE READ AND FOR SWAP READ IF PRELDF IS ON
CHGHLF: MOVEI T1,^D10 ;LARGE CHARGE
LOAD T3,FKBET ;GET HOLD TIME
JUMPE T3,R ;IF NONE, DONE
SUBI T3,0(T1) ;REDUCE BY QUANTUM CHARGE
STOR T3,FKBET
RET ;AND DONE
;UPDATE FOR PROCESS FINISHED ENTERING BALSET
SOSNEB: LOAD T1,FKNWCE ;WS SIZE RESERVED DURING SWAPIN
MOVN 1,1
ADDM 1,NRPMIN ;REMOVE FROM CORE RESERVE
SOS NEBAL
RET
;CHECK FORK HAVING DONE EDISMS, BEING HELD IN BALSET
DISMT: HRRZ 2,FKSTAT(FX) ;SEE IF EDISMS WAIT FINISHED
HLRZ T1,FKSTAT(FX)
JSP 4,0(2)
CAIA ;NO
JRST FRIBP1 ;YES
HLRZ T1,FKPGST(FX) ;GET TIME PARAMETER FOR BLOCKW
JSP 4,BLOCKW ;SEE IF GRACE PERIOD OVER
JRST DISMT1 ;NO
CALL DISACC ;YES, ACCOUNT FOR WAIT
CALL DISMT2 ;PUT FORK INTO NORMAL BLOCK STATE
MOVEI FX,GOLST-FKPT ;REINIT LIST PTR
JRST SKDJW ;RETURN
DISMT1: SKIPGE 1,FKINT(FX) ;SEE IF INTERRUPT PENDING
TLNE 1,(1B1) ;AND ACCEPTABLE
JRST SKDJW ;NO
MOVX 1,PSIWT% ;YES, REMEMBER FORK WAS WAITING
IORM 1,FKINT(FX)
FRIBP1::JRST DISMT3 ;LET IT RUN
DISMT2: PUSH P,FKNBW(FX) ;SAVE TIME THAT WAIT STARTED
CALL REMBSJ ;REMOVE JOB FROM BAL SET
CALL GLREM ;REMOVE FORK FROM GOLST
POP P,FKPGST(FX) ;SAVE TOD OF DISMISS FOR NEWST
CALL WTCON2 ;PUT ON WAIT LIST
RET
;CALL PERIODIC WS MGT ROUTINES
WSMPER==^D500 ;LENGTH OF PERIOD
WSMCHK: SETOM RWSOKF ;FLAG TO ALLOW REMWS IN WSMGR
CALL TSTGCC ;SEE IF GCCOR NEEDED
SKIPA ;NO
CALL DOGCC ;YES, DO IT AND ACCOUNT OVERHEAD
MOVE T1,SUMNR
ADD T1,NRPLQ
ADD T1,IOIP
CAMGE T1,MAXNR ;UNACCOUNTED PAGES?
CALL DOGCC ;YES, COLLECT
MOVE T1,NRPLQ
ADD T1,IOIP
CAIGE T1,^D32
SETZ T1,
SKIPE NRPLQ
CAMG T1,NRPMIN ;LOW ON MEM?
CALL WSMGR ;YES, FIX
MOVE T1,TODCLK
CAMGE T1,WSMTIM ;TIME FOR UPDATES?
JRST WSMCK1 ;NO
ADDI T1,WSMPER ;YES, SETUP NEXT TIME
MOVEM T1,WSMTIM
CALL STEPFH ;UPDATE HISTORY VALUES
CALL WSMGR ;CHECK FOR SWAP
WSMCK1: SETZM RWSOKF ;RESET FLAG
RET
;STEP FORK HISTORY VALUES - RUN PERIODICALLY
FHUNIT==1B<^L<FKHST>> ;UNIT VALUE IN HISTORY
STEPTC==^D8 ;TIME CONSTANT, LARGER FOR SLOWER CHANGE
STEPFH: MOVSI FX,-NFKS ;SCAN FORK TABLES
STEPH1: SKIPGE FKPT(FX) ;FORK EXISTS?
JRST STEPH2 ;NO
LOAD T3,FKHST
IMULI T3,STEPTC-1 ;COMPUTE H*(X-1)/X
MOVE T1,FKSWP(FX) ;GET FLAGS
TXZN T1,FKIBH ;WAS IN BALSET DURING INTERVAL?
TXNE T1,FKIBS ;FORK NOW IN BALSET?
ADD T3,[FHUNIT] ;YES, ADD UNIT VALUE
HLLM T1,FKSWP(FX) ;UPDATE FLAGS
IDIVI T3,STEPTC
STOR T3,FKHST
STEPH2: AOBJN FX,STEPH1
RET
;GET FORK HISTORY VALUE
;VALUE USED TO RANK FORK WORKING SETS PRIORITY IN MEM
;GREATER NUMBER MEANS HIGHER PRIORITY
; FX/ FORK INDEX
;VALUES IN RESULT
FHMNSK==4000B17 ;NOSKED, TOP PRIORITY
FHMRUN==2000B17 ;RUNNABLE
FHMPQ== 400B17 ;PRIORITY QUEUE
FHMBS== 200B17 ;IN BALSET
FHMCSK== 100B17 ;CRITICAL SECTION
FHMBIP==40B17 ;PI BUMP
;FHMWTS== 70B17 ;WAIT STATE CODE
GFHST: MOVE T4,FKSWP(FX) ;GET SWAP FLAGS
SETZ T1, ;START WITH 0
TMNE PIBMP ;FORK NEEDS BUMPING FOR PI?
ADD T1,[FHMBIP] ;YES. GIVE IT HELP THEN
TXNE T4,BSNSK ;NOSKED?
ADD T1,[FHMNSK] ;YES, PRIORITY
TXNE T4,BSCRSK ;CRITICAL SECTION?
ADD T1,[FHMCSK] ;YES
LOAD T2,FKQN
CAIG T2,HIGHQ ;ON PRIORITY QUEUE?
ADD T1,[FHMPQ] ;YES, BUMP
TXNN T4,FKBLK ;FORK RUNNABLE?
JRST GFHST1 ;YES
LOAD T2,FKGOLN ;NO, GET BLOCK WAIT PRIORITY
;STOR T2,FHMWTS,T1 ;INCLUDE IN HISTORY WORD
OPSTR <ADD T1,>,FKHST ;USE HISTORY VALUE
RET
GFHST1: ADD T1,[FHMRUN] ;YES, MAKE IT BETTER THAN ALL BLOCKED FORKS
TXNE T4,FKIBS ;IN BALSET?
ADD T1,[FHMBS] ;YES, BASIC UNIT VALUE
OPSTR <ADD T1,>,FKGOLN ;GOLST POSITION IS FINAL DETERMINANT
RET
;WORKING SET MANAGER
;SELECT WORKING SETS TO SWAP INTO OR OUT OF MEMORY
WSMGR: TRVAR <MAXWS,MAXWSF,MINWS,MINWSF,WSMSUP,WSMSNR>
MOVEI T4,NFKS ;ASSIGN GOLST POSITION TO ALL FORKS ON GOLST
HRRZ FX,GOLST
WSMGS1: JUMPE FX,WSMG0 ;JUMP IF END OF LIST
MOVEI FX,-FKPT(FX) ;GET FORK INDEX
STOR T4,FKGOLN ;STORE POSITION
HRRZ FX,FKPT(FX) ;STEP LIST
SOJA T4,WSMGS1 ;STEP POSITION NUMBER
WSMG0: MOVSI FX,-NFKS ;SCAN FORK TO SELECT WORST IN-MEMORY
SETZM WSMSUP ; FORK AND BEST NOT-IN-MEM FORK
SETZM WSMSNR ;INIT SUMNR COUNT
MOVX T1,1B1
MOVEM T1,MINWS
MOVNM T1,MAXWS
SETOM MINWSF
WSMG2: MOVE T1,FKSWP(FX) ;GET SWAP FLAGS
TXNE T1,FKWSL ;WS IN MEM?
JRST [ LOAD T2,FKWSS ;YES, COMPUTE TOTAL
ADDM T2,WSMSNR
LOAD T2,FKCSIZ
ADDM T2,WSMSUP ;TOTAL USED PAGES
CALL GFHST ;GET HISTORY VALUE
CAML T1,MINWS ;HAVE NEW MINIMUM?
JRST WSMG1 ;NO
MOVEM T1,MINWS ;YES, SAVE VALUE AND FX
HRRZM FX,MINWSF
JRST WSMG1]
TXNN T1,FKIBS ;NOT IN MEM, WANTS TO BE?
JRST WSMG1 ;NO
CALL GFHST ;WS NOT IN MEM, GET HISTORY VAL
CAMG T1,MAXWS ;NEW MAX?
JRST WSMG1 ;NO
MOVEM T1,MAXWS ;YES, SAVE VALS
HRRZM FX,MAXWSF
WSMG1: AOBJN FX,WSMG2
; ..
; ..
MOVE T4,WSMSNR ;CHECK TOTAL
PIOFF ;PREVENT CHANGE AT INT LEVEL
MOVE T3,SUMNR
ADD T4,BALSHC
PION
CAMN T4,T3
IFSKP.
MOVE T3,SUMNR
BUG(SUMNR2,<<T3,D>,<T4,D>>)
MOVEM T4,SUMNR
ENDIF.
SKIPN RWSOKF ;REMWS OK HERE?
JRST WSMG6 ;NO, NO SWAPOUTS
WSMG8: MOVE T1,NRPLQ
ADD T1,IOIP ;CHECK AVAILABLE MEM
SKIPE NRPLQ
CAMG T1,NRPMIN ;LOW?
JRST WSMG4 ;YES, DO SOMETHING ABOUT IT
SKIPGE FX,MINWSF ;HAVE FORK WHICH COULD GO OUT?
JRST WSMG6 ;NO
JN FKIBS,,WSMG6 ;JUMP IF IT BELONGS IN BALSET
CAIGE T1,^D32 ;DOESN'T, MEM GETTING LOW?
JRST WSMG7 ;YES, FLUSH IT
WSMG6: SKIPGE MAXWS ;HAVE A FORK WAITING TO COME IN?
JRST WSMG3 ;NO
MOVE FX,MAXWSF ;YES, GET ITS FX
MOVE T1,MAXWS ;SEE IF BEST NOT-IN-MEM IS BETTER THAN
SKIPL MINWSF ; WORST IN-MEM (OR NONE IN MEM)
CAMLE T1,MINWS
JRST WSMG5 ;YES, LOAD
LOAD T1,FKWSS ;ELSE, SEE IF FORK WOULD FIT WITH OTHERS
ADD T1,SUMNR
CAML T1,MAXNR ;FITS?
JRST WSMG3 ;NO, DO NOTHING
WSMG5: CALL LOADWS ;LOAD FORK
JRST WSMG3 ;COULDN'T
JRST WSMG0 ;RECHECK
WSMG4: MOVE T2,SUMNR ;MEM DEFINITELY OVERLOADED?
CAML T2,MAXNR
IFSKP.
ADD T2,IOIP ;INCLUDE PAGES DUE
CAML T2,MAXNR ;STILL UNDER LIMIT?
JRST WSMG6 ;NO, DO NOTHING
CALL DOGCC ;COLLECT UNASSIGNED PAGES
MOVE T2,SUMNR ;RECHECK LIMIT
CAMGE T2,MAXNR
JRST WSMG6 ;UNDER, CONTINUE
ENDIF. ;OVER, REMOVE SOMETHING
MOVE T1,NWSMEM
CAILE T1,1 ;MORE THAN ONE FORK IN MEM?
IFSKP.
CALL DOGCC ;NO, CLEAR OUT SHARED PAGES
JRST WSMG6 ;AND LEAVE FORK AS IS
ENDIF.
WSMG7: SKIPGE FX,MINWSF ;HAVE A FORK TO REMOVE?
JRST WSMG3 ;NO, DO NOTHING NOW
MOVX T1,FKBLK
TDNN T1,FKSWP(FX) ;FORK BLOCKED?
AOS NREMR ;NO, COUNT SWAPOUT OF RUNNABLE FORK
CALL REMWS
SKIPN POSPGF ;POST PURGE DONE?
CALL FKGC ;NO, REMOVE FORK PAGES
JRST WSMG0 ;RECHECK
WSMG3: RET ;DONE
;DO GCCOR AND SWITCH OVERHEAD CHARGING
DOGCC: CALL RDSIVL ;YES, SWITCH OVERHEAD CHARGING
MOVEM T1,SKDTHS
CALL GCCOR
SETOM LSTPFK ;NOTE PAGER CONTEXT INVALID
CALL RDSIVL ;READ LAST INTERVAL
ADDM T1,GCCTIM ;ACCUMULATE GCCOR TIME
MOVN T1,SKDTHS ;RESET SCHED OVERHEAD TIME
ADDM T1,SKDLST
RET
;ADJUST CONTENTS OF BALANCE SET
;SCAN DOWN GOLIST, REMOVING OR ADDING PROCESSES TO BALSET
; AS APPROPRIATE
RTUNIT==^D10000 ;RT UNIT FOR FORCED REMOVAL
RTMIN==^D30000 ;MINIMUM TIME-OUT
RTMAX==^D120000 ;MAX TIME-OUT
AJBYPF==1B0 ;LOCAL FLAG - PASSED A NON-BALSET FK
AJNNLF==1B1 ;NO NEW LQ FORKS
AJHQOF==1B2 ;HQ FORKS ONLY
AJRTRM==1B4 ;RT REMOVAL FLAG
;LOCAL VARS - PAIRS MUST BE IN ORDER
RS AJBNHQ,1 ;RUNNING NUMBER HQ FORKS
RS AJBNLQ,1 ;RUNNING NUMBER LQ FORKS
RS AJBHQP,1 ;RUNNING TOTAL HQ PAGES
RS AJBLQP,1 ;RUNNING TOTAL LQ PAGES
RS NXTAJB,1 ;TIME NEXT AJBALS DUE
RS AJBFLG,1 ;PERMANENT FLAGS
BSPAD==^D20 ;PAD FOR BALSET SUM
BSPADO==^D10 ;POS OR NEG OFFSET FOR REMOVING OR LOADING
;TEST FOR AJBALS NECESSARY BEFORE SELECTING FORK TO RUN
TSTBAL: MOVE T1,MAXNR
CAMGE T1,SUMBNR ;MEM OVERCOMMITTED?
JRST TSTBL1 ;YES, ADJUST
MOVE T1,TODCLK
CAMGE T1,NXTAJB ;TIME FOR PERIODIC CHECK?
RET ;NO, DO NOTHING
TSTBL1: AOS NAJBAL ;COUNT FORCED CALLS
CALLRET AJBALS ;DO IT
;ADJUST BALANCE SET
AJBALS: TRVAR <AJLODN,AJBLFK,AJBBSC,PRIPST,RTREM>
;ACS Q1,Q2,FX,P1,P2 SHOULD BE SAVED HERE
SKIPE PAGDIF ;NEW PAGES IN SYSTEM?
CALL ADJSWP ;YES. ADJUST PAGING TO MATCH NEW STATE
SETOM PRIPST ;NO SKIPPED PROCESS YET
SETZM AJLODN ;NUMBER FORKS LOADED ON THIS CALL
SETZM AJBNHQ ;INIT VARIABLES
SETZM AJBNLQ
SETZM AJBHQP
SETZM AJBLQP
SETOM AJBLFK
HLL F,AJBFLG ;GET PERM FLAGS
SKIPN CLASSF ;NON-CLASS SCHEDULER?
TXNN F,SK%HQR ;HQ DISASTER AVOIDANCE?
IFSKP.
MOVE T1,HQLAV ;YES, GET CURRENT HQ LDAV
CAMGE T1,HQLEV1 ;BELOW TURN OFF POINT?
TXZ F,AJNNLF ;YES
CAML T1,HQLEV2 ;ABOVE TURN ON POINT?
TXO F,AJNNLF ;YES
CAMGE T1,HQLEV3 ;BELOW TURN OFF POINT?
TXZ F,AJHQOF ;YES
CAML T1,HQLEV4 ;ABOVE TURN ON POINT?
TXO F,AJHQOF ;YES
ELSE.
TXZ F,AJNNLF!AJHQOF ;NO DISASTER AVOIDANCE, NORMALIZE FLAGS
ENDIF.
MOVE T1,MAXNR ;SET LIMIT FOR HOLDING FORKS
SUBI T1,100
MOVEM T1,MAXHNR ;HOLD LIMIT
SETZM BSKED
SETZ Q1, ;INIT NBP COUNT
MOVE 4,BALSHC ;INIT SUMNR COUNT
ADDI T4,BSPAD ;INCLUDE PAD
MOVEM T4,AJBBSC ;SAVE BASE
MOVEI Q2,BSLST ;SCAN LIST OF RECENT BALSET ENTRIES
TXZ F,AJRTRM ;ASSUME NOT DOING RT REMOVAL
MOVE T1,NBPROC ;GET # IN BS
CAMN T1,NGOJOB ;ALL IN?
JRST AJBS2 ;YES
MOVE T1,IRJAV ;GET CURRENT LOAD AVG
IMULI T1,RTUNIT ;COMPUTE TIME TO HOLD PROCESSES
CAIGE T1,RTMIN
MOVEI T1,RTMIN
CAILE T1,RTMAX
MOVEI T1,RTMAX ;MAKE SURE NUMBER IS GOOD
MOVEM T1,RTREM ;SAVE IT
TXO F,AJRTRM ;SAY DOING REMOVALS
AJBS2: HRRZ Q2,0(Q2) ;GET NEXT
JUMPE Q2,AJBAL4 ;JUMP IF END OF LIST
MOVEI FX,-FKBSPW(Q2)
SETZRO FKBSHF ;ASSUME NOT HOLDING
LOAD T1,FKBET ;GET HOLD EXPIRATION TIME
LOAD T2,FKJOBN
SUB T1,JOBRT(T2) ;COMPUTE TIME REMAINING
TXNN F,AJRTRM ;ALL PROCESSES FIT?
JRST AJBS0 ;YES. SKIP RT TEST THEN
HLRZ CX,0(Q2) ;GET ENTRY TIME
HRRZ P2,TODCLK ;GET NOW
SUB P2,CX ;COMPUTE TIME SINCE ENTERED
SKIPGE P2 ;CHECK FOR OVERFLOW
ADD P2,[1B17] ;YES. FIX IT
CAMG P2,RTREM ;TOO LONG?
AJBS0: TXNE T1,FKBETH ;NEGATIVE NUMBER? (CHECK HIGH-ORDER BIT)
JRST [ SETZRO FKBET ;YES, SET TIME EXPIRED
CALL REMBSL ;REMOVE FROM PROTECT LIST
JRST AJBS2]
LOAD T1,FKWSS
ADD T1,T4
SUBI T1,BSPAD
CAMLE T1,MAXHNR ;ROOM TO HOLD FORK?
JUMPG Q1,AJBS2 ;NO (UNLESS FIRST FORK SEEN)
SETONE FKBSHF ;SET HOLD FLAG
CALL AJBUQS ;STILL HOLDING, COUNT PAGES
ADDM T1,T4
AOJA Q1,AJBS2
;SCAN GOLST CHECKING ALL FORKS, AND REMOVE, LOAD, OR
;LEAVE AS IS.
AJBAL4: TXZ F,AJBYPF ;INIT FLAG
MOVEI Q2,GOLST
AJBAL1: HRRZ Q2,0(Q2) ;GET NEXT
AJBL10: JUMPE Q2,AJBALX ;DONE IF REACHED END OF GOLST
MOVEI FX,-FKPT(Q2) ;GET FORK INDEX
LOAD P2,FKQN ;CHECK FORK QUEUE
CAIGE P2,MAXQ ;HIGH QUEUES?
TDZA P2,P2 ;YES, USE 0 INDEX
MOVEI P2,1 ;NO, USE 1 INDEX
JE FKIBS,,AJBAL5 ;JUMP IF NOT IN BALSET
FRIBP0: MOVE CX,FKSWP(FX) ;GET FLAGS
TXNE CX,FKBSHF ;HELD?
JRST AJBAL1 ;YES. ALREADY ACCOUNTED
TXNE CX,BSNSK!BSCRSK ;NOSKED OR CRSKED?
JRST AJBL77 ;YES. TRY TO KEEP IT THEN
JN PIBMP,,AJBL77 ;KEEP IF PI'ING
SKIPG CLASSF ;WITHHOLDING WINDFALL?
IFSKP.
CALL CKAHED ;YES. IS THIS ONE AHEAD?
ANSKP.
JRST AJBL9 ;YES, REMOVE FROM BALSET AND MEM
ENDIF.
TXNE F,AJHQOF ;HQ FORKS ONLY?
JUMPN P2,AJBL9 ;YES, FLUSH IF LQ
JUMPE Q1,AJBAL7 ;NO FURTHER CHECKS IF FIRST FORK SEEN
AJBL77: LOAD 1,FKWSS
ADD 1,4
SUBI T1,BSPAD ;REDUCE BY PAD OFFSET
CAMG Q1,MAXBP ;FORK STILL FITS IN BALSET?
CAMLE 1,MAXNR
JRST AJBL12 ;NO
AJBAL7: LOAD T1,FKWSS ;GET SIZE
ADDM T1,4 ;UPDATE SUM
CALL AJBUQ0 ;UPDATE QUEUE SUMS
AOJA Q1,AJBAL1 ;COUNT FORK
;HERE IF FORK NOW IN BALSET DOESN'T APPEAR TO FIT.
AJBL12: HRRZ Q2,0(Q2) ;STEP LIST
CALL CLRIBS ;NOTE NOT IN BALSET
TXON F,AJBYPF ;NOTE PASSED A FORK NOT IN BALSET
CALL SETPRP ;IF FIRST ONE, DO PRIORITY STUFF
AOS NREMJ ;NOTE FORCED REMOVALS
JRST AJBL10
;HERE TO REMOVE FORK FROM BALSET AND SWAPOUT IMMEDIATELY
AJBL9: CALL CLRIBS
AJBAL2: JE FKWSL,,AJBAL1 ;JUMP IF WS NOT LOADED
HRRZ Q2,0(Q2) ;STEP LIST
PUSH P,T4 ;SAVE SUMBNR COMPUTATION
CALL REMWS ;SWAPOUT
POP P,T4 ;RESTORE LOCAL SUMBNR
JRST AJBL10
;FORK NOT NOW IN BALSET
AJBAL5: SKIPG CLASSF ;WITHHOLDING WINDFALL?
IFSKP.
CALL CKAHED ;YES. IS THIS FORK AHEAD?
ANSKP.
JRST AJBAL2
ENDIF.
SKIPGE SPMLCK ;SOMEONE TRYING TO GET A PAGE?
IFSKP.
CALL TSTFRP ;YES. IS THIS FORK HOARDING THE PAGE?
JRST AJBAL1 ;YES. DON'T LOAD IT
ENDIF.
JUMPE Q1,AJBAL6 ;NO FURTHER CHECKS IF FIRST FORK SEEN
LOAD T1,FKWSS ;CHECK SIZE
ADD T1,T4 ;BALSET SUM WHICH WOULD INCLUDE THIS FORK
ADDI T1,BSPADO ;INCREASE BY PAD OFFSET
CAMGE Q1,MAXBP ;ROOM IN BALSET FOR ANOTHER FORK?
CAMLE T1,MAXNR ;ROOM FOR THIS FORK'S PAGES?
JRST AJBL11 ;NO
TXNE F,AJNNLF ;ALLOW NEW LQ FORKS?
JUMPN P2,AJB666 ;NO. IF LQ CHECK FOR SPECIAL LOADING
SKIPE CLASSF ;CLASS SCHEDULING BEING USED?
TXNN F,AJBYPF ;YES. BYPASSED ANYBODY?
SKIPA ;NO
JRST [ CALL CORFCT ;YES. GET PRIORITY OF THIS PROCESS
CAMGE T1,PRIPST ;THIS ONE LOWER THAN ONE PASSED?
JRST AJB667 ;YES. CHECK FOR SPECIAL LOAD
CALL SETIBS ;NO. LOAD IT THEN
JRST AJBAL7] ;AND PROCEED
AJBAL6: CALL SETIBS ;NOTE IN BALSET
TXNE F,SK%HT2 ;NO HOLD TIME IF SKIPPED PROCESS?
TXNN F,AJBYPF ;YES, SKIPPED A PROCESS?
JRST AJBAL7 ;NO. ACCOUNT FOR IT
AJBL69: SETZRO FKBET ;YES. NO HOLD TIME NOW
CALL REMBSL ;REMOVE FROM PROTECTED LIST
JRST AJBAL7 ;AND PROCEED
AJBL11: TXON F,AJBYPF ;NOTE PASSED A FORK NOT IN BALSET
CALL SETPRP ;IF FIRST TIME, DO PRIROITY STUFF
JRST AJBAL1
;FORK CANNOT BE LOADED ACCORDING TO NORMAL RULES. CHECK FOR SPECIAL
;LOADING CRITERIA
AJB666: SKIPA T1,[AJBAL1] ;WHERE TO GO
AJB667: MOVEI T1,AJBL11 ;WHERE TO GO
JN BSCRSK,,AJB668 ;IF CRSKED, LOAD IT
JN PIBMP,,AJB668 ;OR IF PI ALSO
JRST 0(T1) ;CAN'T LOAD IT, GIVE UP
AJB668: CALL SETIBS ;PUT IN BALSET
JRST AJBL69 ;BUT NO HOLD TIME
;UPDATE RUNNING QUEUE SUMS
AJBUQS: LOAD P2,FKQN ;SET QUEUE SET INDEX
CAIGE P2,MAXQ
TDZA P2,P2 ;USE 0 FOR INTERACTIVE QUEUES
MOVEI P2,1 ;1 FOR COMPUTE QUEUE
AJBUQ0: LOAD T1,FKWSS ;UPDATE FOR CURRENT FORK
ADDM T1,AJBHQP(P2) ;COUNT PAGES
AOS AJBNHQ(P2) ;COUNT FORKS
RET
;ROUTINE OF AJBALS TO HANDLE FIRST INSTANCE OF A FORK THAT
;WON'T FIT
SETPRP: SKIPN CLASSF ;CLASS SCHEDULING?
RET ;NO. NOTHING TO DO HERE THEN
CALL CORFCT ;YES. GET PRIROITY OF THIS PROCESS
CAMLE T1,[1.0] ;ONE OF THE COMPUTING PROCESSES?
JRST [ TXZ F,AJBYPF ;NO. IGNORE THE SKIP THEN
RET] ;AND DONE
MOVEM T1,PRIPST ;SAVE PRIORITY OF THIS PROCESS
RET ;AND DONE
;EXIT FROM AJBALS
AJBALX: SUB T4,AJBBSC ;REMOVE PAD AND ORIG BALSHC
PIOFF ;PREVENT CHANGE AT INT LEVEL
MOVE T3,SUMBNR
ADD T4,BALSHC ;INCLUDE CURRENT BALSHC
PION
CAMN T4,T3 ;CHECK SUM
IFSKP.
MOVE T3,SUMBNR
BUG(SUMNR1,<<T3,D>,<T4,D>>)
MOVEM T4,SUMBNR
ENDIF.
MOVE T1,TODCLK ;SET TIME FOR NEXT PERIODIC CALL
ADD T1,AJBLCY
MOVEM T1,NXTAJB
MOVEM F,AJBFLG ;SAVE NEW SETTINGS
MOVE T1,AJLODN ;RETURN COUNT OF FORKS LOADED THIS CALL
RET
;CHECK FOR POSSIBILITY OF LOADING FORK INTO BALSET
CHKTFK: SAVEQ
MOVEI Q2,GOLST
CHKTF1: HRRZ Q2,0(Q2) ;GET NEXT FORK ON GOLST
JUMPE Q2,R ;DONE WHEN LIST NULL
MOVEI FX,-FKPT(Q2) ;GET FORK INDEX
JN FKIBS,,CHKTF1 ;JUMP IF FORK IN BALSET
SKIPGE SPMLCK ;IS SOME FORK TRYING TO GET A PAGE?
IFSKP.
CALL TSTFRP ;YES. IS THIS FORK GUILTY OF HOLDING IT?
JRST CHKTF1 ;YES. SKIP IT THEN
ENDIF.
CALL TRYLDF ;SEE IF IT CAN BE LOADED
RET ;COULDN'T, TRY NO MORE
JRST CHKTF1 ;COULD, TRY AGAIN
;CHECK SPECIFIC FORK FOR LOADING INTO BALSET
;N.B. (THIS IS A MONUMENT). THIS CODE SHOULD NEVER BE
;CALLED TO LOAD A FORK OF LOWER PRIORITY THAN ONE NOT LOADED.
;THAT IS, IF A FORK HIGHER ON GOLST CAN NOT BE LOADED, THEN
;DON'T CALL TRYLDF TO LOAD THIS ONE. PRESENTLY, CHKTFK IS
;THE ONLY USER OF TRYLDF AND IT DOES THE RIGHT THING.
;WOE BE TO HE (OR HER) THAT VIOLATES THIS TRUST.
TRYLDF: MOVE T2,AJBFLG ;GET AJBALS PERMANENT FLAGS
JN BSCRSK,,TRYLD0 ;IF CSKED, ALWAYS TRY
JN PIBMP,,TRYLD0 ;IF PI'ING, ALSO LOAD
TXNN T2,AJNNLF ;LQ FORK ALLOWED?
IFSKP.
LOAD T1,FKQN ;NO
CAIL T1,MAXQ ;THIS FORK LQ?
RET ;YES, DON'T LOAD
ENDIF.
SKIPG CLASSF ;CLASS SCHED?
IFSKP.
CALL CKAHED ;WINDFALL?
ANSKP.
JRST TRYLD2 ;NO, DON'T LOAD
ENDIF.
TRYLD0: LOAD T1,FKWSS ;GET WS SIZE
ADDI T1,BSPAD ;INCREASE BY PAD AND OFFSET
ADD T1,SUMBNR ;COMPUTE BALSET SIZE WITH FORK
CAML T1,MAXNR ;FORK WS FITS?
JRST TRYLD2 ;NO, DON'T LOAD
CALL SETIBS ;NOTE FORK IN BALSET
MOVE T1,FKSWP(FX)
TXNN T1,FKWSL ;WS NOW LOADED?
SETZM WSMTIM ;NO, CHECK SOON
RETSKP ;DONE
TRYLD2: RET
;REMOVE FORK FROM BALSET WHEN BLOCKING
REMBSJ: JE FKIBS,,R ;RETURN IF ALREADY OUT
CALL CLRIBS
LOAD T1,FKWSS
LOAD T2,FKCSIZ
ADDI T2,4
CAMGE T2,T1 ;WS SMALLER NOW?
CALL [ MOVE T1,T2 ;YES, REDUCE RESERVE
CALLRET ADJWSS]
HLRZ 2,FKJOB(FX) ;MAINTAIN SUBSYSTEM INFO...
HRRZ 2,JOBNAM(2)
HRRZ 1,FKNR(FX)
ADDM 1,SSIZE(2) ;INTEGRATE WS SIZE
AOS SNBLKS(2) ;AND COUNT NUMBER OF SAMPLES
RET
;NOTE FORK IN/OUT OF BALSET, MAINTAIN COUNT
; FX/ FORK INDEX
SETIBS: SETONE <FKIBS,FKIBH>
SETZRO FKBSHF ;INIT HOLD FLAG
JXE F,SK%HT1,SETIB2 ;ALWAYS DO HOLD IF SK%HT1 0
MOVE T1,NBSL ;NUMBER HOLDING FORKS
CAIL T1,2 ;ENOUGH NOW?
JRST SETIB1 ;YES, NO MORE
JUMPE T1,SETIB2 ;GIVE HOLD TIME IF NO OTHERS
MOVE T1,SUMBNR
ASH T1,1
CAML T1,MAXNR ;IF 1 OTHER, GIVE HOLD TIME IF
JRST SETIB1 ; BALSET LESS THAN HALF FULL
SETIB2: CALL APPBSL ;APPEND FORK TO BALSET LIST
MOVEI T2,^D10000 ;MAX HOLD TIME IF BIAS SCHEDULER
SKIPE CLASSF ;IS IT?
MOVEI T2,UTLINI*UTLTMI ;NO. SET TO NEWUTL CYCLE THEN
LOAD T1,FKWSS ;COMPUTE HOLD TIME AS SIZE * 20 MS
IMULI T1,^D20
CAIGE T1,^D1000 ;AT LEAST 1 SEC
MOVEI T1,^D1000
CAILE T1,0(T2) ;OVER MAX LIMIT?
MOVEI T1,0(T2) ;YES. APPLY LIMIT THEN
LOAD T2,FKJOBN
ADD T1,JOBRT(T2) ;COMPUTE EXPIRATION TIME
STOR T1,FKBET
SETIB1: LOAD T1,FKWSS
ADDM T1,SUMBNR ;UPDATE BALSET SUM
AOS NBPROC
RET
CLRIBS: SETZRO <FKIBS,FKBET>
CALL REMBSL ;REMOVE FORK FROM LIST
LOAD T1,FKWSS
MOVN T1,T1
ADDM T1,SUMBNR ;UPDATE BALSET SUM
SOS NBPROC
RET
;APPEND FORK TO BALSET LIST
APPBSL: SAVEAC <Q1,Q2>
MOVEI Q1,BSLST
APPBS1: HRRZ Q2,0(Q1) ;GET NEXT, SAVE PREV PTR
JUMPN Q2,[MOVE Q1,Q2 ;STEP AGAIN IF NOT END OF LIST
JRST APPBS1]
MOVEI Q2,FKBSPW(FX) ;END OF LIST, MAKE PTR TO NEW FORK
HRRM Q2,0(Q1) ;APPEND
SETZRO FKBLP ;NEW END
AOS NBSL ;MAINTAIN COUNT
RET
;REMOVE FORK FROM BALSET LIST
REMBSL: MOVEI T1,BSLST
CLRIB1: HRRZ T2,0(T1) ;GET NEXT, SAVE PREV
JUMPE T2,R ;NOT ON LIST, IGNORE
CAIE T2,FKBSPW(FX) ;DESIRED ONE?
JRST [ MOVE T1,T2 ;NO, STEP
JRST CLRIB1]
HRRZ T2,0(T2) ;SPLICE LIST
HRRM T2,0(T1)
SOS NBSL ;MAINTAIN COUNT
RET
;CHANGE FKNR, UPDATE SUMNR IF NECESSARY
; T1/ NEW VALUE OF FKNR
; FX/ FORK INDEX
ADJWSS::JE FKWSL,,ADJWS1 ;JUMP IF FORK WS NOT LOADED
LOAD T2,FKWSS ;WS IN MEM, MUST UPDATE SUMNR
SUBM T1,T2 ;GET DIFFERENCE
ADDM T2,SUMNR ;ADJUST SUMNR
ADJWS1: STOR T1,FKWSS ;SET NEW VALUE
RET
;REMOVE FORK WORKING SET FROM MEMORY
;REMWSN - REMOVE WORKING SET WITHOUT POSTPURGING
REMWS: JE BSWTB,,REMWS1 ;JUMP IF FORK NOT IN WAIT
CALL DISACC ;TERMINATE WAIT
HRRZ T1,FKPGST(FX)
CAIN T1,DISMT ;HDISMS?
JRST [ CALL DISMT2 ;YES, CLEAN UP
JRST REMWS1]
CAIE T1,PRELWT ;ENTERING?
CAIN T1,SWPINT
CALL SOSNEB ;YES, CLEAN UP
REMWS1: SKIPN POSPGF ;POSTPURGING?
IFSKP.
JSP T4,SWPINT ;YES, PSB AND UPT IN CORE?
ANSKP.
CALL WSSWPO ;YES, DO IT
SETOM LSTPFK ;NOTE PAGER CONTEXT INVALID
JRST REMBS7
ENDIF.
REMWSN: MOVSI 2,(-PLKV)
MOVSI T4,-NFKSPP ;UNLOCK ALL SPECIAL PAGES
REMBS6: XCT FKSPPT(T4) ;GET PAGE ID
HRRZ T1,SPT(T1) ;GET CORE ADDRESS
ADDM T2,CST1(T1) ;UNLOCK IT
AOBJN T4,REMBS6
REMBS7: LOAD T2,FKWSS ;GET CURRENT RESERVE
MOVN 1,2
ADDM 1,SUMNR ;REDUCE BALSET SIZE
SETZRO FKWSL ;WORKING SET NOT LOADED NOW
SOS NWSMEM
RET
;TABLE OF SPECIAL FORK PAGES
;EXECUTED BY LOADBS, REMBSJ, WSSWPO
FKSPPT::HRRZ T1,FKPGS(FX) ;PSB
HLRZ T1,FKPGS(FX) ;UPT
LOAD T1,FKJSB ;JSB
LOAD T1,FSSPTN ;SECOND PSB
NFKSPP==:.-FKSPPT
;LOAD WORKING SET INTO MEMORY
LOADWS: MOVE T1,NRPLQ
CAIG T1,NFKSPP ;ENOUGH PAGES TO START LOAD?
RET ;NO
SAVEAC <P2>
LDJB3:: AOS NWSMEM ;COUNT NUMBER OF PROCESSES
SETONE <BSWTB,FKWSL> ;SET FLAGS, WS LOADED AND WAITING
MOVEI 1,SWPINT
MOVEM 1,FKPGST(FX) ;SET TEST TO WAIT FOR PSB AND PT
HRRZ 1,FKNR(FX) ;GET WORKING SET SIZE
HRRZ 2,FKWSP(FX) ;PAGES NOW ASSIGNED
CAMGE 1,2 ;REASONABLE VALUES?
JRST FIXWSP ;NO
LDJB5: ADDM 1,SUMNR ;UPDATE SUM OF NR
SUB T1,T2 ;REDUCE RESERVE BY PAGES ALREADY ASSIGNED
SKIPN PRELDF ;PRELOADING?
MOVEI T1,NFKSPP ;NO, USE SMALL CONSTANT
STOR T1,FKNWCE ;SAVE PRELOAD RESERVE
ADDM T1,NRPMIN ;ADDITIONAL RESERVE FOR ENTERING FORKS
AOS NEBAL ;COUNT ENTERING PROCESSES
MOVSI P2,-NFKSPP ;SWAPIN ALL SPECIAL PAGES
LDJB1: XCT FKSPPT(P2)
CALL SWPIN0
AOBJN P2,LDJB1
AOS NWSLOD ;COUNT WS LOADS
AOS NBWT ;COUNT WAITING BALSET PROCESS
AOS NBSWP ;COUNT IS AS SWAP WAIT
MOVE T1,TODCLK ;SET START OF WAIT TIME
MOVEM T1,FKNBW(FX)
SKIPN INSKED ;CHECK COMPLETION UNLESS NOT INSKED
SKIPN PRELDF ; AND PRELOADING
SKIPL FORKX ;CAN'T DO IT IF FORK CONTEXT SETUP
SKIPA
CALL SKDJ3
NOP
RETSKP
;HANDLE BAD FKCSIZ - RECOMPUTE COUNT AND REPORT VALUES
FIXWSP: MOVE T4,MONCOR ;SETUP TO SCAN CST3
SETZ T2, ; TO COUNT ASSIGNED PAGES
FIXWS1: LOAD T1,CSTOFK,(T4) ;GET FORK ASSIGNMENT
CAMN T1,FX ;THIS FORK?
AOS T2 ;YES, COUNT
CAME T4,NHIPG ;SCANNED ALL PAGES
AOJA T4,FIXWS1 ;NO
LOAD T1,FKWSS ;GET EXISTING VALUES
LOAD T3,FKCSIZ
BUG(FKWSP1,<<T1,D>,<T2,D>,<T3,D>>)
STOR T2,FKCSIZ ;FIX COUNT
CAMGE T1,T2 ;NOW LOOKS OK?
MOVE T1,T2 ;NO, RESET FKWSS ALSO
STOR T1,FKWSS
JRST LDJB5 ;NOW...
;UPDATE QUEUE NUMBER AND TIME USED VALUE
SAVRT: CALL UCLOCK ;UPDATE CLOCKS
SETZ T1,
SKIPN T2,JOBSKD
MOVE T2,JOBBIT
TXNE T2,JP%SYS ;SYSTEM FORK?
TXO T1,BSSPQ ;YES
SKIPE NSKED ;NOSKED?
TXO T1,BSNSK ;YES
SKIPE CRSKED ;CSKED?
TXO T1,BSCRSK ;YES
XOR T1,FKSWP(FX) ;COMPARE WITH LAST SETTING
TXNN T1,BSNSK!BSCRSK!BSSPQ ;CHANGED?
IFSKP.
ANDX T1,BSNSK!BSCRSK!BSSPQ
XORM T1,FKSWP(FX) ;YES, UPDATE VALUES
CALL GLREM ;CHANGE FORK POSITION ON GOLST
CALL GOCONC
ENDIF.
MOVE T1,FKSWP(FX)
TMNN PIBMP ;ANY HIGH PRIORITY SCHED FLAGS?
TXNE T1,BSCRSK!BSSPQ
IFSKP.
TXZE T1,BSNST!BSOVRD ;NO, CLEAN UP IF NECESSARY
MOVEM T1,FKSWP(FX)
ELSE.
MOVE T2,FACTSW ;YES, SYSTEM IN NORMAL OPERATION?
TXNN T2,SF%RMT!SF%LCL ;I.E. LOCAL OR REMOTE LOGINS ALLOWED?
TXZ T1,BSNST ;NO, DON'T START WATCHDOG
TXOE T1,BSNST ;YES, JUST HAPPENED?
IFSKP.
MOVEM T1,FKSWP(FX) ;YES, UPDATE FLAG
MOVE T2,TODCLK ;INIT ALARM FOR 5 SECS
ADDI T2,^D5000
MOVEM T2,HPSWRN
ENDIF.
MOVE T2,TODCLK
CAMGE T2,HPSWRN ;TIME UP?
IFSKP.
ANDXE. T1,BSOVRD ;YES, NOT ALREADY NOTED?
MOVE T2,JOBNO ;YES, JOB PROBABLY STUCK
SKIPA ;BUGCHK DISABLED NOW.
;This bugchk is intended to detect forks which are running with priority
;(e.g. JP%SYS, NOSKED, CRKSED, or even PIBUMP) and using too much time.
;This is useful to know because such cases impact response for all
;ordinary users. We are still trying to determine the right heuristic
;for unreasonable vs. reasonable behaviour, and this bugchk is disabled
;so as not to alarm people with false indications. If you are suffering
;from unexplained sluggish response, you may want to turn the SKIPA
;above into a NOP and see what info is produced. The bugchk reports
;the job and fork number of the offending fork. DLM 10/28/81
BUG(HPSCHK,<<T2,JOBNO>,<FX,FRKNO>>)
SETONE BSOVRD ;OVERRIDE PRIORITY
CALL GLREM ;FIND NEW POSITION ON GOLST
CALL GOCONC
ENDIF.
ENDIF.
MOVE T1,FKT1 ;GET TIME USE SINCE SETRT
SETZM FKT1
LOAD T2,FKQN ;ACCUMULATE QUEUE DISTRIBUTION
ADDM T1,QSUM(T2) ; STATISTICS
MOVE T1,BSQNT ;GET REMAINING BALSET QUANTUM
SUB T1,BSQNT0 ;COMPUTE QUANTUM CHARGE THIS RUNNING
OPSTRM <ADDB T1,>,FKQTM ;UPDATE FORK QUANTUM
SKIPN T3,JOBBIT ;GET CONTROLLING WORD
MOVE T3,JOBSKD
LOAD T3,JP%MXQ,T3 ;CHECK MAXQ
CAIE T3,0 ;NON-0 AND EXCEEDED?
CAMGE T2,T3
JUMPG T1,R ;DONE IF NOT EXHAUSTED
AOS BSKED ;EXHAUSTED, REQUEST ADJUST OF BALSET
CALL GLREM ;NO, REMOVE FROM GOLST WHILE CHANGING QUEUE
SAVR12: LOAD T2,FKQN ;GET Q NUMBER
SAVRT8: CAIGE 2,MAXQ ;NOW ON MAX Q?
AOSA T2 ;NO, GO TO NEXT ONE
MOVEI T2,MAXQ ;STAY ON MAXQ
SKIPN T4,JOBBIT ;SPECIAL PRIORITY?
SKIPE T4,JOBSKD ;ANY JOB-WIDE SCHEDULING CAPS?
IFNSK.
LOAD T3,JP%RTG,T4 ;GET RUNTIME GUARANTEE
SKIPN CLASSF ;IGNORE IF CLASS SCHEDULING
JUMPN T3,RTG1 ;CHECK IT IF SET
LOAD T3,JP%MNQ,T4 ;GET MIN QUEUE
CAMGE T2,T3 ;WITHIN RANGE?
MOVE T2,T3 ;NO, FIX
LOAD T3,JP%MXQ,T4 ;GET MAX QUEUE
ANDN. T3 ;IF SET...
CAML T2,T3 ;WITHIN RANGE?
MOVEI T2,-1(T3) ;NO, FIX
ENDIF.
SAVRT9: STOR 2,FKQN ;SET NEW QUEUE NUMBER
MOVE 1,QUANTT(2) ;GET QUANTUM FOR THIS QUEUE
RTG2: STOR 1,FKQTM ;SET NEW QUANTUM VALUE
MOVE 3,TODCLK
MOVEM 3,FKTIME(FX) ;SET TIME ON QUEUE
CALLRET GOCONC ;NO. PUT FORK BACK ON GOLST
;DISMISS JOB FOR RESCHEDULING
DISMSJ: MOVE FX,FORKX
JUMPL FX,R ;NO JOB
CALL SAVRT ;UPDATE QUEUE AND QUANTUM
SETZ 1,
CALL SCHP2 ;SET BALSET WORD
RET
;ROUTINE USED BY LOADBS AND AJBALS TO CHECK IF A PROCESS SHOULD
;BE LOADED. IF A PRCESS IS "WAY AHEAD" OF ITS UTILIZATION,
;IT WILL NOT BE LOADED.
; FX/ FORK INDEX
;RETURNS: +1 NOT "WAY AHEAD"
; +2 "WAY AHEAD"
CKAHED: LOAD T1,FKQN ;GET QUEUE NUMBER OF PROCESS
MOVE CX,FKSWP(FX) ;GET FLAGS ALSO
TXNN CX,BSNSK!BSCRSK ;IF CRITICAL, DO IT
CAIG T1,INTQ1 ;INTERACTIVE OR SPECIAL?
RET ;NO. LOAD IT TO ALLOW AN INTERACTION
JN PIBMP,,R ;OR IF DOING PI, ALLOW IT
CALL DIST ;GET PROCESS'S DISTANCE
JUMPGE T1,R ;IF NOT AHEAD, LOAD IT
RETSKP ;IS AHEAD. DON'T LOAD IT
;RUNTIME GUARANTEE CONTROL - COMPUTE RUNTIME/ELAPSED, COMPARE WITH
;DESIGNATED CPU FRACTION. RAISE OR LOWER SCHEDULER PRIORITY AS
;NECESSARY.
; T4/ PRIORTY WORD
;LOWQT - CONTROLS INTERVAL OVER WHICH TIME IN GUARANTEED
LOWQT==^D10000
RTG1: LOAD T3,JP%RTG,T4 ;GET CPU RUN-TIME GUARANTEE
MOVE 1,JOBNO
SKIPN JOBCK0 ;GUARANTEE WORDS INIT'ED?
JRST [ MOVE 4,TODCLK ;INITIALIZE TIME QUARANTEE WORDS
MOVEM 4,JOBCK0
MOVE 4,JOBRT(1)
MOVEM 4,JOBCK1
JRST RTG3]
SAVRT7: JUMPE T3,SAVRT8 ;NOT SPECIAL
MOVE 4,JOBRT(1) ;COMPUTE RUNTIME DURING TEST INTERVAL
SUB 4,JOBCK1
MOVE 1,TODCLK ;COMPUTE REAL TIME OF TEST INTERVAL
SUB 1,JOBCK0
IMULI 4,^D100 ;COMPUTE RUNTM*100%/PCT TO GET
IDIV 4,T3 ;EXPECTED REAL TIME
SUB 4,1 ;EXCESS OR DEFICIT OF REAL TIME
CAIL 4,LOWQT/2 ;ACCUMULATED REASONABLE EXCESS?
JRST SAVRT5 ;YES, REDUCE PRIORITY
RTG3: IMUL T3,NBPROC ;GIVE BALSET QUANTUM PROPORTIONAL TO NBPROC
IMUL T3,SKDBQT ;AND DESIRED PERCENTAGE
IDIVI T3,^D100
MOVEI T2,INTQ0 ;KEEP ON A HIGH Q TO GET EXCLUSIVE TIME
JRST SAVRT9
;4 NOW CONTAINS TIME SUCH THAT AFTER THAT REAL-TIME INTERVAL,
;WITH NO RUNNING OF PROGRAM, ACTUAL PCT WILL EXACTLY EQUAL DESIRED PCT
SAVRT5: CAIGE 4,LOWQT ;ACCUMULATED EXCESS .GE. LOW-Q QUANT?
JRST [ CAIGE 2,MAXQ-1 ;NO, STILL ON HIGHER QUEUES?
JRST SAVRT8 ;YES, FOLLOW NORMAL ALGORITHM
MOVEI 2,MAXQ-1 ;STAY ON SECOND LOWEST QUEUE
JRST SAVRT9]
CAIGE 4,2*LOWQT ;ACCUMULATED LARGE EXCESS?
JRST SAVRT6 ;NO
SUBI 4,2*LOWQT ;YES, REMOVE EXCESS OVER 2*LOWQT
MOVN 4,4
ADDM 4,JOBCK0 ;FROM CONSIDERATION
MOVEI 4,2*LOWQT
SAVRT6: MOVEI 2,MAXQ ;PUT ON LOWEST QUEUE
STOR 2,FKQN ;SET QUEUE NUMBER
SAVR66: MOVE 1,QUANTT ;GIVE ONLY SHORT QUANTUM SO WILL RECHECK SOON
JRST RTG2
SUBTTL Miscellaneous global routines
;UPDATE USER CLOCKS ON REQUEST (MUST BE NOSKED OR INSKED)
UCLOCK::SKIPN INSKED ;NOW INSKED?
JRST [ PUSH P,T4 ;NO, READ CLOCK
JSP T4,MTIME
POP P,T4
JRST UCLOC3]
SKIPN FKT0 ;ALREADY DONE?
RET ;YES
MOVE T1,SKDLST ;TIME AT ENTRY TO SCHED
UCLOC3: SKIPN FKTOFF ;CLOCK NOW OFF?
IFSKP.
SUB T1,FKTOFF ;YES, COMPUTE TIME OFF
ADDM T1,FKTLST ;ACCUMULATE AS LOST
MOVE T1,FKTOFF ;USE TIME OFF AS END OF CHARGE INTERVAL
ENDIF.
SUBM T1,FKT0 ;COMPUTE INCREMENTAL RUNTIME
EXCH T1,FKT0 ;INIT NEW INTERVAL
SKIPE INSKED ;IF INSKED
SETZM FKT0 ;LEAVE FKT0 CLEAR
CAIGE T1,0 ;OVERFLOW?
ADD T1,BASOVV ;YES, CORRECT
MOVN 2,1
ADDM T2,BSQNT ;SUBTRACT TIME FROM QUANTUM
ADD 1,RUNT2 ;ACCUMULATE HIGH PRECISION TIME
IDIVI 1,NTMS ;CONVERT TO MS
MOVEM 2,RUNT2 ;RETAIN HIGH PRECISION UNITS
JUMPE 1,R ;RETURN IF NO CHANGE
ADDM T1,FKT1 ;ACCUMULATE RUNTIME SINCE SETRT
MOVE 2,JOBNO
SKIPGE JOBRT(T2) ;RUNTIME OK?
CALL [ BUG(NEGJRT,<<T2,JOBNO>>)
SETZM JOBRT(T2) ;QUICK FIX
SAVET
LOAD T2,JBTFK,(T2) ;NO, GET TOP FORK
MOVX T1,PSILO% ;FORCE LOGOUT ON IT
CALLRET PSIGR]
ADDM 1,JOBRT(T2) ;ACCOUNT FOR JOB
ADDM 1,FKRT ;ACCOUNT FOR FORK
ADDM T1,USRTIM ;ACCUMULATE TOTAL USER TIME
ADDM T1,JOBIRT(T2) ;ACCUMULATE JOB RUN-TIME AS WELL
HRRZ T3,JOBCLS(T2) ;GET CLASS OF THIS FORK
ADDM T1,CLSIRT(T3) ;AND ACCUMULATE HERE ALSO
JN JOBRTP,(2),UCLOC1 ; Do runtime limit exceeded check if one set
UCLOC2: HRRZ 2,JOBNAM(2) ;GET SUBSYSTEM INDEX
ADDM 1,STIMES(2) ;ACCUMULATE SUBSYSTEM TIME
RET
UCLOC1: LOAD 3,JOBRTP,(2) ; Get blk ptr
LOAD 3,TIMTIM,(3) ; Get limit
JUMPE 3,UCLOC2 ; Already done this stage?
CAML 3,JOBRT(2) ; Exceeded yet?
JRST UCLOC2 ; No, continue normally
LOAD 3,JOBRTP,(2) ; Once again retrieve blk ptr
SETZRO TIMTIM,(3) ; So we won't try to do it again
PUSH P,1 ; Save increment of time
MOVX 1,PSITL%
MOVE 2,FORKX
HLRZ 2,FKJOB(2) ; First get job this fork belongs to
LOAD T2,JBTFK,(T2) ; then the top fork of the job
CALL PSIGR ; Start up the fork
POP P,1 ; Recover time increment
MOVE 2,JOBNO ; And job number
JRST UCLOC2 ; Done here, do the rest
;TURN FORK CPU TIME CLOCK OFF
FRTOFF::JSP T4,MTIME ;SAVE TIME AT WHICH CLOCK TURNED OFF
MOVEM T1,FKTOFF
RET
;TURN FORK CPU TIME CLOCK BACK ON
; RETURNS:
; 1/ CPU TIME THAT CLOCK WAS OFF IN HP UNITS
FRTON:: JSP T4,MTIME
SUB T1,FKTOFF ;COMPUTE TIME OFF
ADDM T1,FKTLST ;ACCUMULATE AS LOST TIME
ADDM T1,FKT0 ;ADJUST START OF PERIOD TO EXCLUDE LOST TIME
SETZB T1,FKTOFF ;NOTE CLOCK NOW ON
EXCH T1,FKTLST ;RETURN ACCUMULATED LOST TIME AND CLEAR
RET
;GET CURRENT FORK RUNTIME
GETFRT::NOSKED
;SKIPN T1,FKTOFF ;USE CLOCK OFF TIME IF PRESENT
JSP T4,MTIME ;READ CLOCK
SUB T1,FKT0 ;COMPUTE TIME SINCE LAST UPDATE
CAIGE T1,0 ;OVERFLOW?
ADD T1,BASOVV ;YES, CORRECT
ADD T1,RUNT2 ;ADD FRACTIONAL MS
IDIVI T1,NTMS ;CONVERT TO MS
ADD T1,FKRT ;ADD CURRENT TIME
OKSKED
RET
;GET CURRENT FORK RUNTIME IN HIGH PRECISION UNITS
GETHRT::NOSKED
;SKIPN T1,FKTOFF ;USE CLOCK OFF TIME IF PRESENT
JSP T4,MTIME ;READ CLOCK
SUB T1,FKT0 ;COMPUTE TIME SINCE LAST UPDATE
CAIGE T1,0 ;CHECK FOR OVERFLOW
ADD T1,BASOVV
ADD T1,RUNT2 ;ADD FRACTIONAL MS ACCUMULATED RUNTIME
MOVE T2,FKRT ;GET MS ACCUMULATED RUNTIME
IMULI T2,NTMS ;CONVERT TO HP UNITS
ADD T1,T2 ;COMPUTE SUM OF ACCUMULATED AND RECENT RUNTIME
OKSKED
RET
;PUT FORK ON WAIT LIST
WTCONC::MOVE 1,TODCLK ;SAVE TIME FORK WAS PUT INTO WAITING
MOVEM 1,FKPGST(FX)
WTCON2: HRRZ 1,FKSTAT(FX) ;CHECK FOR SPECIAL WAITS
CAIN 1,TCITST ;TTY INPUT?
JRST [ MOVEI 2,TTILST ;YES
JRST WTCON1]
CAIE T1,TCOTST ;TTY OUTPUT WAITS?
CAIN T1,TTOBET
SKIPA
CAIN T1,TTOAV
JRST [ MOVEI T2,TTOLST ;YES
JRST WTCON1]
CAIE T1,HALTT ;ANY OF VARIOUS HALTS?
CAIN T1,JRET
JRST WTCON3
CAIE T1,SUSWT
CAIN 1,FRZWT ;FREEZE?
WTCON3: JRST [ MOVEI T2,FHV1
STOR T2,FKGOLN ;SET WAIT PRIORITY
MOVEI 2,FRZLST
JRST WTCON1]
CAIE 1,TRMTS1
CAIN 1,TRMTST ;INFERIOR FORK WAIT?
JRST [ MOVEI 2,TRMLST
JRST WTCON1]
CAIE 1,BLOCKM
CAIN 1,BLOCKW ;CLOCKS?
SKIPA
CAIN 1,BLOCKT
JRST [ MOVEI 2,CLKLST
SETZM ALARMT ;FORCE RECHECK OF CLOCKS TO INCLUDE THIS
JRST WTCON1]
CAIN 1,PIDWAT ;IPCF?
JRST [ MOVEI 2,WT2LST ;YES, USE GENERAL PURPOSE LIST
JRST WTCON1]
MOVEI 2,WTLST ;ALL OTHER WAITS
WTCON1: STOR 2,FKWTL ;REMEMBER WHICH LIST
MOVEI 1,FKPT(FX) ;PUT FORK ON PROPER LIST
EXCH 1,0(2)
HRRM 1,FKPT(FX)
SETONE FKBLK ;NOTE BLOCKED
MOVE 2,FKSTAT(FX) ;NOW TRY TEST ONCE
HLRZ 1,2
HRRZ 4,2
JSP 4,0(4)
IFSKP.
CALL UNBLK1 ;CONDITION ALREADY SATISFIED
ELSE.
SKIPGE 1,FKINT(FX) ;TEST FAILS, IS INTERRUPT REQUESTED?
TLNE 1,(1B1) ;AND NOT ALREADY DEFERRING?
IFSKP.
MOVX 1,PSIWT% ;YES, FLAG INTERRUPT FROM WAIT STATE
IORM 1,FKINT(FX)
CALL UNBLK1 ;AND WAKEUP FORK
ENDIF.
ENDIF.
RET
;MOVE FORK FROM ONE WAIT LIST TO ANOTHER. USED WHEN WAIT STATE
; CHANGES (E.G. FREEZE)
; FX/ FORK
RECONC::SAVEAC <Q2>
JE FKBLK,,UNBLK3 ;JUMP IF NOT BLOCKED
LOAD 1,FKWTL ;GET POINTER TO SPECIFIC LIST
RECON1: HRRZ Q2,0(1) ;SCAN FOR FORK
JUMPE Q2,UBBAD ;COULDN'T FIND IT
MOVEI 2,-FKPT(Q2) ;GET FOR INDEX
CAIE 2,0(FX) ;DESIRED FORK
JRST [ MOVEI 1,0(Q2) ;NO
JRST RECON1]
HRRZ 2,0(Q2) ;YES, REMOVE FROM CURRENT LIST
HRRM 2,0(1)
CALL WTCON2 ;PUT ON NEW LIST
JRST UNBLK3 ;RETURN
; CHKWT - Check if fork in FX is on wait list
CHKWT:: JE FKBLK,,R ;JUMP AND RETURN IF NOT BLOCKED
RETSKP ;SKIP IF BLOCKED
;CHKTOT - CALLED BY TTYSRV WHEN A TTY OUTPUT EVENT HAS OCCURED WHICH
;WILL LIKELY ALLOW A FORK TO WAKEUP
CHKTOT::AOS TSKED ;JUST FLAG FOR NEXT TCLKS
RET
;UNBLOCK SPECIFIC FORK - MAY BE CALLED FROM OUTSIDE SCHEDULER
; 1/ FORK INDEX
; CALL UNBLKF
; RETURN +1 ALWAYS
UNBLKF::SAVEAC <FX>
MOVEM 1,FX ;SETUP ARG
NOSKD1 ;NOSKED WHILE DIDDLING LISTS
JE FKBLK,,UNBF1 ;JUMP IF NOT BLOCKED
UNBF2: HRRZ 2,FKSTAT(FX)
HLRZ 1,FKSTAT(FX) ;SETUP TEST CALL
JSP 4,0(2) ;IS FORK REALLY UNBLOCKED?
JRST UNBF1 ;NO, IGNORE CALL
CALL UNBLK1 ;DO THE WORK
UNBF1: OKSKD1
RET
;ROUTINE TO UNBLOCK SPECIFIC FORK
; FX/ FORK
UNBLK1::SAVEAC <Q2,F>
MOVE F,SCHFLG ;SETUP PERMANENT FLAGS
JE FKBLK,,UBBAD ;JUMP IF NOT BLOCKED
LOAD 1,FKWTL ;YES, GET POINTER TO IT
UNBLK2: HRRZ Q2,0(1) ;GET NEXT FORK ON LIST
JUMPE Q2,UBBAD ;COULDN'T FIND IT
MOVEI 2,-FKPT(Q2) ;GET INDEX FOR FORK
CAIE 2,0(FX) ;REQUESTED ONE?
JRST [ MOVEI 1,0(Q2) ;NO
JRST UNBLK2]
HRRZ 2,0(Q2) ;REMOVE FORK FROM LIST
HRRM 2,0(1)
CALL SCHEDJ ;ADJUST QUEUE AND PUT ON GOLST
UNBLK3: RET
UBBAD: BUG(UNBFNF)
JRST UNBLK3
;WAKEUP SUPERIOR, E.G. ON FORK SUSPENSION
; T1/ TEST ADR - WAKEUP ONLY IF THIS TEST
; CALL WAKSUP
WAKSUP: SAVEAC <FX>
MOVE T2,T1
HRRZ T1,FORKN ;GET SUPERIOR
JUMPE T1,R ;RETURN IF TOP FORK
ADD T1,SUPERP
LDB T1,T1
HRRZ FX,SYSFK(T1)
JE FKBLK,,R ;RETURN IF NOT BLOCKED
HRRZ T1,FKSTAT(FX)
CAME T1,T2 ;SPECIFIED TEST?
RET ;NO, DON'T WAKE
CALLRET UNBLK1 ;WAKE IT
;SPECIAL ROUTINE CALLED FROM NSPSRV TO UNBLOCK A PROCESS IF
;NECESSARY. ACCEPTS:
; T1/ FORK INDEX
; T2/ LOW ADDRESS FOR SCHEDULER TESTS
; T3/ HIGH ADDRESS
;THIS ROUTINE CHECKS IF PROCESS IS ON WAIT LIST AND IS WAITING
;ON ONE OF THE SPECIFIED ROUTINES
NETWKF::MOVE T3,T2 ;SET UP RANGE TEST
NETWK1::SAVEAC <FX>
MOVE FX,T1 ;GET FORK # INTO FX
NOSKD1 ;PREVENT STATE CHANGES
JE FKBLK,,UNBF1 ;JUMP IF NOT BLOCKED
HRRZ T1,FKSTAT(FX) ;YES. GET WAIT ROUTINE
CAML T1,T2 ;WITHIN RANGE?
CAMLE T1,T3 ;STILL?
JRST UNBF1 ;NO. DON'T WAKE IT
JRST UNBF2 ;YES. WAKE IT
;CHECK CLOCK LIST. WAKEUP ANY FORKS HAVING EXPIRED TIMES AND
; COMPUTE TIME FOR NEXT CHECK
CLKCHK: SAVEQ
MOVE 1,TODCLK
CAMGE 1,ALARMT ;TIME FOR CHECK NOW?
RET ;NO
MOVSI 1,(1B1) ;YES, INIT TO FIND MIN VALUE
MOVEM 1,ALARMT
MOVEI 5,CLKLST
CLKCH1: HRRZ Q2,0(Q1) ;GET NEXT FORK
JUMPE Q2,R
MOVEI FX,-FKPT(Q2) ;GET FORK INDEX
HRRZ 2,FKSTAT(FX)
HLRZ 1,FKSTAT(FX)
JSP 4,0(2) ;CALL WAKEUP TEST
JRST [ ADD 1,TODCLK ;FAILS, RETURNS NUMBER OF MS REMAINING
CAMGE 1,ALARMT ;THIS SOONER THAN SOONEST SO FAR?
MOVEM 1,ALARMT ;YES
MOVEI Q1,0(Q2)
JRST CLKCH1]
HRRZ 2,0(Q2) ;REMOVE FORK FROM LIST
HRRM 2,0(Q1)
CALL SCHEDJ ;WAKEUP THE FORK
JRST CLKCH1
;CHECK SUPERIOR ON FORK TERMINATION
;SUPERIOR FORK INDEX LEFT IN LH OF DISMISS TEST WORD
;OR ENTER AT SUPUB0 WITH FORKX INDEX IN 1
SUPUNB: STKVAR <SUPFX>
MOVEM FX,SUPFX ;SAVE CURRENT
HLRZ FX,FKSTAT(FX) ;GET SUPERIOR FORK INDEX
JE FKBLK,,SUPUX ;JUMP IF SUPERIOR NOT BLOCKED
LOAD 1,FKWTL ;SEE WHERE IT IS
CAIE 1,TRMLST ;WAITING FOR TERMINATION?
JRST SUPUX ;NO
HRRZ 2,FKSTAT(FX) ;YES
CAIN 2,TRMTS1 ;WAITING FOR ANY FORK?
JRST SUPU1 ;YES, WAKE IT
HLRZ 2,FKSTAT(FX) ;NO, SPECIFIC FORK.
CAMN 2,SUPFX ;WAITING FOR THIS ONE?
SUPU1: CALL UNBLK1 ;YES, WAKE IT
SUPUX: MOVE FX,SUPFX ;RESTORE SELF
SKIPE PRIMRY ;IS THIS IN FORK INIT?
CALL FKTMI ;NO. GENERATE INTERRUPT THEN
RET
SUPUB0::MOVEI T1,TRMINT ;GET CHANNEL FOR FORK TERMINATION
MOVE T2,FORKX ;TO SELF
CALL PSIRQ ;GO REQUEST INTERRUPT
CHKINT ;AND MAKE IT HAPPEN
RET ;AND DONE
;WTCHK - TEST ALL NON-SPECIAL WAITING FORKS
;CHKTL - TEST TTY OUTPUT FORKS
WTCHK:: MOVEI T1,^D300 ;SET TIME FOR NEXT CHECK
MOVEM T1,WTTIM
MOVEI Q2,WTLST ;HEAD OF WAITING LIST
CALL SCHEDA
CHKTL: MOVEI Q2,TTOLST ;TTY OUTPUT LIST
SETZM TSKED
SCHEDA: MOVEI Q1,0(Q2) ;KEEP POINTER TO LAST ONE IN Q1,
SCHEDB: HRRZ Q2,0(Q1) ;POINTER TO CURRENT ONE IN Q2
JUMPE Q2,R ;DONE
MOVEI FX,-FKPT(Q2) ;FORK INDEX
HRRZ 2,FKSTAT(FX) ;FKSTAT/ TEST VALUE,,ADR OF TEST ROUTINE
HLRZ 1,FKSTAT(FX)
JSP 4,0(2) ;CALL TEST ROUTINE
JRST SCHEDA ;NO SKIP => STILL NOT RUNNABLE
HRRZ 2,0(Q2) ;REMOVE FROM WAIT LIST
HRRM 2,0(Q1)
CALL SCHEDJ ;SETUP QUEUE AND GOLST
JRST SCHEDB
;DO WAKEUP ON FORK - SET NEW STATUS AND PUT ON GOLST
SCHEDJ: AOS TTYBKS ;NOW RUNNABLE, COUNT UNBLOCKS
SETZRO FKBLK
CALL APSKED ;SEE IF RESCHEDULE NEEDED
CALL NEWST ;ESTABLISH NEW QUEUE STATUS
CALL GOCONC ;PUT ON READY LIST
CALLRET CHKTFK ;PUT FORK INTO BALSET IF POSSIBLE
;UPON RECEIPT OF WAKEUP EVENT FOR FORK, SEE IF RESCHEDULING SHOULD
;OCCUR TO RUN UNBLOCKED FORK RATHER THAN CURRENT FORK
; FX/ FORK INDEX
; CALL APSKED
; RETURN +1 ALWAYS, ALL ACS PRESERVED
APSKED::SKIPL FORKX ;HAVE A CURRENT FORK?
SKIPE INSKED ;ALREADY IN SCHEDULER?
JRST APSK1 ;NO OR YES - NO NEED TO INTERRUPT
CAIL FX,NFKS
JRST APSK1 ;NOT A VALID FORK
SAVEAC <T1,T2,FX>
LOAD T1,FKQN ;GET QUEUE NUMBER OF NEW FORK
MOVE FX,FORKX
LOAD T2,FKQN ;GET QUEUE NUMBER OF CURRENT FORK
CAMLE T1,T2 ;NEW BETTER THAN CURRENT?
RET ;NO, DO NOTHING
MOVX T1,SK%RSQ ;SYSTEM MGR WANTS THIS?
TDNN T1,SCHFLG
JRST APSK1 ;NO
AOS SKEDF3 ;YES, REQUEST RESCHED
AOS PSKED
;ISB SCDCHN ;RIGHT NOW
RET
APSK1: AOS PSKED ;FORCE DISMISS OF CURRENT FORK
RET
;PUT FORK ON GO LIST. LIST IS KEPT IN PRIORITY ORDER; SEARCH
; DOWN LIST UNTIL FORK OF LOWER PRIORITY IF FOUND. PUT NEW FORK
; JUST AHEAD OF THAT ONE.
GOCONC: SAVEAC <Q2>
CALL ONGOL ;PUT ON GO LIST
AOS NGOJOB ;KEEP COUNT OF READY JOBS
LOAD T3,FKJOBN ;GET JOB #
MOVSI CX,1 ;GET AN INCREMENTOR
ADDB CX,JOBCLS(T3) ;ONE MORE ON GOLST
TLNE CX,777776 ;FIRST ONE ON?
JRST GOCNC0 ;NO.
HRRZ T3,JOBCLS(T3) ;GET CLASS
INCR CLGLC,(T3) ;ONE MORE ON GOLST
GOCNC0: LOAD T3,FKQN ;UPDATE QUEUE COUNTS
CAIGE T3,MAXQ
AOSA NHQFK
AOS NLQFK
GOC3: RET
;ROUTINE TO DO THE WORK.
ONGOL: STKVAR <SFX,SP1,SP2>
MOVEM FX,SFX ;SAVE FORK INDEX
CALL CORFCT ;COMPUTE PRIORITY
MOVEM T1,SP1
MOVEM T2,SP2 ;SAVE PRIORITIES
MOVEI T3,GOLST
GOC1: HRRZ T4,0(T3) ;GET NEXT FORK ON LIST
JUMPE T4,ONGOL0 ;END OF LIST?
MOVEI FX,-FKPT(T4) ;GET FORK INDEX (.. -FKPT(T4) )
CALL CORFCT ;GET PRIORITY OF THIS FORK
CAMG T1,SP1 ;BETTER THAN CLASS TO BE ADDED?
JRST GOC2 ;NO. TEST FOR INSET HERE
ONGOL1: MOVEI T3,0(T4) ;YES. KEEP SCANNING
JRST GOC1
;FOUND BEGINNING OF CLASS STUFF. NOW FIND PROPER PLACE
GOC2: CAMN T1,SP1 ;SAME CLASS?
CAMGE T2,SP2 ;YES. BELONG HERE?
JRST ONGOL0 ;YES. DO IT
JRST ONGOL1 ;NO. KEEP GOING THEN
ONGOL0: MOVE FX,SFX ;GET ORIGINAL INDEX
MOVEI T1,FKPT(FX) ;PUT FORK INTO LIST
HRRM T1,0(T3) ;LINK TO PREVIOUS
HRRM T4,FKPT(FX)
RET ;DONE
;REMOVE SELECTED FORK FROM GOLST
; FX/ fork index
GLREM: SAVEQ
HRRZ Q1,FX ;GET FORK INDEX FOR COMPARING
MOVEI 1,GOLST
GLREM1: HRRZ Q2,0(1)
JUMPE Q2,GLREM2
MOVEI FX,-FKPT(Q2) ;GET FORK INDEX
CAME FX,Q1 ;DESIRED ONE?
JRST [ MOVEI 1,0(Q2) ;NO
JRST GLREM1]
HRRZ Q2,FKPT(FX) ;YES, REMOVE FROM LIST
HRRM Q2,0(1)
SOS NGOJOB
LOAD Q1,FKJOBN ;GET JOB NUMBER
MOVSI CX,-1 ;GET A DECREMNTOR
ADDB CX,JOBCLS(Q1) ;DO IT
TLNE CX,-1 ;LAST ONE OFF?
JRST GLREM0 ;NO
HRRZ Q1,JOBCLS(Q1) ;GET CLASS NUMBER
DECR CLGLC,(Q1) ;ONE LESS ON GOLST
GLREM0: LOAD Q1,FKQN ;UPDATE QUEUE COUNTS
CAIGE Q1,MAXQ
SOSA NHQFK
SOS NLQFK
RET
GLREM2: BUG(GLFNF)
JSKP:: JRST 1(4)
JRET:: JRST 0(4)
;COMPUTE PRIORITY NUMBER FOR FORK
; FX/ FORK INDEX
; CALL CORFCT
; RETURNS +1, T1/ FIRST SORT KEY
; T2/ SECOND SORT KEY
CORFCT: LOAD T2,FKQN ;GET QUEUE NUMBER
SKIPE CLASSF ;CLASS SCHEDULING?
JRST CORFC1 ;YES
CORFCO: MOVE T1,TODCLK ;NO, ORDER FORKS BY QUEUE NUMBER
SUB T1,FKTIME(FX) ; AND THEN ELAPSED TIME ON QUEUE
JUMPL T1,CORFC2 ;RETURN NEG IF NOT DUE TO RUN YET
ADD T1,TBASE(T2) ;ADD QUEUE OFFSET
CORFC2: MOVE T2,FKSWP(FX) ;CHECK FLAGS
TXNE T2,BSNSK ;NOSKED?
ADD T1,NSKBAS ;YES, PRIORITY
TXNE T2,BSOVRD ;PRIORITY OVERRIDE?
IFSKP.
TMNN PIBMP ;IF PI'ING, GIVE PRIORITY
TXNE T2,BSCRSK ;CRITICAL SECTION?
SKIPA
TXNE T2,BSSPQ ;OR SPECIAL SYSTEM FORK?
ADD T1,CSKBAS ;YES, SECOND PRIORITY
ENDIF.
MOVEI T2,0 ;NO SECOND KEY HERE
RET
;THE CLASS SCHEDULER IS ON. THE COMPUTED PRIORITY IS AS FOLLOWS:
; T1/ CLASS DISTANCE+MODIFIER
; OR T1/ SPECIAL VALUE
;WHERE THE SPECIALS ARE:
; 6.0 IF NOSKED
; 4.0 IF Q 0
; IF Q1 OR PI BOOST OR CRSKED OR SPECIAL SYSTEM FORK,
; 3.0 + VALUE (0 TO 1) FOR LENGTH OF TIME ON PRESENT QUEUE
;HOWEVER, IF THE CLASS IS PRESENTLY USING WINDFALL, Q1 PROCESSES
;RECEIVE CSLDST+.05 AS THE PRIORITY
;MODIFIERS IF NON-SPECIAL
; 0.5 IF ON INTQ1 AND CLASS NOT USING WINDFALL
; T2/ JOB DISTANCE + MODIFIER
;WHERE THESE MODIFERS ARE:
; 0.1(1-Q/LOWQ)
;OR T2/ Q NUMBER
; IF PROCESS IS SPECIAL
CORFC1: SAVEAC<T3,T4>
MOVE T1,FKSWP(FX) ;GET PRIORITY FLAGS
TXNE T1,BSNSK ;NOSKED?
JRST CORFC4 ;YES
JUMPE T2,[MOVX T1,<4.0> ;IF QUEUE 0, DO IT
JRST CORFC7]
CAIG T2,INTQ0 ;INTERACTIVE PROCESS?
JRST CORFC5 ;YES. GO HANDLE IT
CALL DIST ;GET DISTANCES
CORFC3: TMNN SK%CL1,SCHFLG ;USING QUEUES OR DISTANCES?
IFNSK. ;IF QUEUES
PUSH P,T1 ;SAVE CURRENT CLASS DIST
LOAD T2,FKQN ;GET QUEUE
CALL CORFCO ;DO OTHER COMPUTATION
MOVE T2,T1 ;RETURN RESULT AS JOB DISTANCE
POP P,T1 ;RECOVER CALL DIST
LOAD CX,FKQN
ELSE. ;IF DISTANCES
LOAD CX,FKQN ;GET Q VALUE AGAIN
FADR T2,LQWBAS-INTQ1(CX) ;ATTENUATE JOB DISTANCE
ENDIF.
IFGE. T1
CAIN CX,INTQ1 ;SECOND INTERACTIVE QUEUE?
FADRI T1,(EXP 0.5) ;YES. ATTENUATE CLASS DISTANCE SUCH
; THAT A WELL-BEHAVED CLASS WILL
; ACHIEVE PRIORITY ON THIS QUEUE
ENDIF.
MOVE T3,FKSWP(FX) ; GET FLAGS AGAIN
TXNE T3,BSOVRD ;OVERRIDDEN?
IFSKP.
TMNN PIBMP
TXNE T3,BSSPQ!BSCRSK ;NO SPECIAL?
IFNSK.
CAMGE T1,[0.5] ;MAKE SURE ADEQUATELY BOOSTED
MOVX T1,<0.5> ;IF NOT, HELP IT OUT SOME, BUT NOT TO
; THE DETRIMENT OF WELL-BEHAVED QUEUE 2
; PROCESSES
ENDIF.
ENDIF.
RET ;AND DONE
;NEED SPECIAL PRIORITY
CORFC8: SKIPA T1,[3.0] ;AHEAD OF ALL COMPUTE BOUND FORKS
CORFC4: MOVX T1,<6.0> ;FOR NOSKED
;The following computes a value which increases from 0 to 1 as
;the length of time on the present queue. This provides a
;round-robin among forks with otherwise equal high priority.
;The computation is N/(N+C) where N is the length of time
;on the queue and C is a constant.
CORFC7: MOVE T2,TODCLK
SUB T2,FKTIME(FX) ;TIME ON QUEUE
FLTR T2,T2
MOVE T4,T2
FADRI T4,(4096.0) ;AN ARBITRARY CONSTANT
FDVR T2,T4
RET ;AND DONE
;GET JOB DIST ONLY, PRESERVE CLASS DIST IN T1
CORFC6: SAVEAC <T1> ;KEEP THE CLASS DIST WE HAVE
CALL DIST ;GET THE JOB DIST
RET ;RETURN THOSE TWO
;PROCESS IS ON QUEUE 1 AND CLASS SCHEDULER IS ON
CORFC5: CALL DIST
SKIPL CLASSF ;WITHHOLDING?
SKIPL T1 ;IN WINDFALL?
JRST CORFC8 ;WITHHOLDING OFF OR NOT IN WINDFALL, BOOST
FADRI T1,(0.5) ;IN WINDFALL AND WITHHOLDING, SMALL BOOST
JRST CORFC3
;COMPUTE NEW UTILIZATION FOR ALL CLASSES.
;COMPUTATION PERFORMED IS:
; U(I+1)=U(I)*e^-(T/C)+F(1-e^(T/C))
;WHERE:
; U(I)=PREVIOUS UTILIZATION
; U(I+1)= NEWLY COMPUTED UTILIZATION
; T/C= 1/20 (TIME CONSTANT OF 60 SEC, COMPUTED EVERY 3 SEC)
; F= FRACTIONAL UTILIZTION IN INTERVAL. COMPUTE AS:
; CLSIRT/TIME WHERE:
; TIME = SELLABLE TIME = (SOLD TIME + IDLE TIME)
NEWUTL: ACVAR <W1,W2,W3> ;GET A WORK REG
MOVE W2,USRTIM ;GET CURRENT USER TIME
SUBM W2,OLDSLD ;COMPUTE TIME SOLD IN INTERVAL
EXCH W2,OLDSLD ;START NEW INTERVAL
MOVE T1,SKDIDL ;GET IDLE TIME (HP UNITS)
SUBM T1,OLDIDL ;COMPUTE IDLE TIME USED IN INTERVAL
EXCH T1,OLDIDL ;AND START NEW INTERVAL
IDIVI T1,NTMS ;CONVERT TO MILLISECONDS
ADD W2,T1 ;TIME = SOLD + IDLE
FLTR W2,W2 ;GET FLOAT OF INTERVAL
JFOV .+1 ;INIT OVERFLOW FLAG
SKIPN CLASSF ;CLASS SCHEDULING ON?
JRST NEWUTJ ;NO, ONLY DO JOB UTILS
MOVEI W1,MAXCLS-1 ;SET UP TO COMPUTE CLASS UTILS
NEWUT0: SKIPN T3,CLSIRT(W1) ;ANY TIME IN THIS INTERVAL?
JRST NEWUT1 ;NO. PROCEED
SETZM CLSIRT(W1) ;CLEAR COUNTER
FLTR T3,T3 ;FLOAT THE VALUE
FDVR T3,W2 ;COMPUTE FRACTIONAL USE
NEWUT1: MOVE T1,CLSUTL(W1) ;GET CLASS UTIL
FSBR T1,T3
FMPR T1,UTLEXP+UTLINI-1 ;DECAY IT
JFOV [ SETZM T1 ;YES. ASSUME UNDERFLOW THEN
JRST .+1]
FADR T1,T3 ;NEW UTIL
MOVEM T1,CLSUTL(W1)
FSBR T1,CLSSHR(W1) ;COMPUTE LINEAR DISTANCE
SKIPL T1 ;WINDFALL?
SKIPGE T3,WA(W1) ;YES. ANY WINDFALL ALLOCATION?
MOVE T3,CLSSHR(W1) ;NO. USE NORMAL SHARE THEN
FDVR T1,T3 ;COMPUTE DISTANCE
JFOV [ SKIPE T3 ;ANY SHARE?
TDZA T1,T1 ;YES. ASSUME ON TARGET THEN
FADRI T1,(MXBIAS) ;NO. MAKE SURE IS RUN LAST THEN
JRST .+1] ;PROCEED
MOVNM T1,CLSDST(W1) ;SAVE DISTANCE
SOJGE W1,NEWUT0 ;DO ALL CLASSES
; ..
;NEWUTL CONTINUED...
;COMPUTE JOB UTILS AND DISTANCES
NEWUTJ: MOVE W1,MJBUSE ;GET HIGHEST JOB IN USE
NEWU00: SKIPGE JOBRT(W1) ;THIS JOB IN USE?
JRST NEWU02 ;NO. SKIP IT THEN
SKIPN T3,JOBIRT(W1) ;THIS JOB HAVE SOME RUN-TIME?
JRST NEWU01 ;NO
SETZM JOBIRT(W1) ;YES. CLEAR COUNTER
FLTR T3,T3 ;GET FLOAT OF TIME
FDVR T3,W2 ;GET FRACTION
NEWU01: MOVE T1,JOBUTL(W1) ;GET CURRENT JOB UTILIZATON
FSBR T1,T3
FMPR T1,UTLEXP+UTLINI-1 ;DECAY IT
JFOV [ SETZM T1
JRST .+1]
FADR T1,T3 ;NEW UTIL
MOVEM T1,JOBUTL(W1) ;SAVE IT
HRRZ T2,JOBCLS(W1) ;GET CLASS
MOVE T3,CLSSHI(T2) ;GET JOB'S SHARE
FSBR T3,T1 ;COMPUTE LINEAR DIFFERENCE
FDVR T3,CLSSHI(T2) ;COMPUTE "EXPONENTIAL DIFFERENCE
JFOV [ SKIPE CLSSHI(T2) ;ANY SHARE?
SETZM T3 ;NO. ASSUME ON TARGET THEN
JRST .+1]
MOVEM T3,JOBDST(W1) ;SAVE JOB DISTANCE
NEWU02: SOJGE W1,NEWU00 ;DO ALL JOBS
MOVE T1,TODCLK ;GET NOW
ADD T1,UTLINT ;WHEN TO DO IT NEXT
MOVEM T1,UTLTIM ;""
;REORDER GOLST
MOVE W1,GOLST ;GET GOLST
SETZM GOLST ;INIT IT TO EMPTY
REORDR: JUMPE W1,R ;IF EMPTY NOW, ALL DONE
MOVEI FX,-FKPT(W1) ;GET FORK INDEX
HRRZ W1,FKPT(FX) ;GET NEXT ITEM
CALL ONGOL ;INSERT IN NEW GOLST
JRST REORDR ;AND PROCEED
ENDAV. ;END ACVAR
;COMPUTE CURRENT DISTANCE FROM TARGET UTIL FOR PROCESS
;FX/ FORK HANDLE
;RETURNS: T1/ DISTANCE FROM CLASS TARGET UTILIZATION (IN %)
; T2/ DISTNCE FROM JOB TARGET UTIL (IN %)
;CLOBBERS ONLY T1 AND T2
DIST: LOAD T2,FKJOBN ;GET JOB NUMBER
HRRZ T1,JOBCLS(T2) ;GET JOB CLASS
MOVE T1,CLSDST(T1) ;GET CLASS DISTANCE
MOVE T2,JOBDST(T2) ;GET JOB DISTANCE
RET ;DONE
;MORE CLASS SCHEDULING PARAMETERS.
;ROUTINES TO MAINTAIN SHARE COUNTS
;ADD A MEMBER TO A CLASS
; T1/ CLASS
REPEAT 0,< ;NOT BEING USED NOW
DECSHR: SOSA CLSCNT(T1) ;ONE LESS ITEM
INCSHR: AOS CLSCNT(T1) ;ONE MORE ITEM
SKIPE CLASSF ;DOING CLASS SCHEDULING?
CALL ADJCLS ;YES. ADJUST CLASS PARAMETERS
RET ;ALL DONE THEN
> ;END OF REPEAT 0
;ROUTINE TO START UP CLASS SCHEDULING
STRCLS: SKIPE CLASSF ;NOW ON?
RET ;YES. NO NEED THEN
ACVAR <W1>
SETOM CLASSF ;START IT UP
REPEAT 0,< ;DON'T NEED THIS BECAUSE NEWUTL ALWAYS ON
MOVEI W1,NJOBS-1 ;SCAN JOBS
STRCL0: SETZM JOBIRT(W1) ;NO INCREMENTAL RUN-TIME YET
SETZM JOBUTL(W1) ;NO UTIL
SOJGE W1,STRCL0 ;DO ALL JOBS
MOVE T1,USRTIM ;GET CURRENT "SOLD" TIME
MOVEM T1,OLDSLD ;INIT INTERVAL
>
MOVE T1,[CLSIRT,,CLSIRT+1]
SETZM CLSIRT
BLT T1,CLSIRT+MAXCLS-1 ;INIT THESE TO 0 ALSO
MOVE T1,[CLSSUM,,CLSSUM+1]
SETZM CLSSUM
BLT T1,CLSSUM+MAXCLS-1 ;CLEAR INTEGRAL ACCUMUALTOR
MOVE T1,[CLSRJA,,CLSRJA+1]
SETZM CLSRJA ;SET UP TO CLEAR RUN AVG AS WELL
BLT T1,CLSRJA+<MAXCLS*NRJAVS>-1 ;CLEAR IT
SETZM CLSCNT ;CLEAR COUNTS AS WELL
MOVE T1,[CLSCNT,,CLSCNT+1]
BLT T1,CLSCNT+MAXCLS-1 ;DO IT
CALL COUNT ;GET CORRECT CLASS COUNTS
RET
ENDAV. ;END ACVAR
;ROUTINES TO COMPUTE CLASS PARAMETERS
;FIRST. COMPUTE ALL CLSCNT VALUES BY SCANNING GOLST
COUNT: SAVEAC <FX> ;SAVE REG
MOVEI T4,NJOBS-1 ;SCAN ALL JOBS
COUNT0: SKIPGE JOBRT(T4) ;THIS JOB ACTIVE?
JRST COUNT4 ;NO
HRRZS T2,JOBCLS(T4) ;YES. GET CLASS
AOS CLSCNT(T2) ;INCREMENT COUNT
COUNT4: SOJGE T4,COUNT0 ;DO ALL JOBS
COUNT1: MOVEI T1,MAXCLS-1
COUNT2: SKIPE CLSCNT(T1) ;ANYBODY IN THIS CLASS?
CALL ADJCLS ;YES. DO COMPUTING THEN
SOJGE T1,COUNT2
;NOW COMPUTE ON GOLST COUNT
HRRZ T1,GOLST ;GET TOP ENTRY OF GOLST
COUNT5: JUMPE T1,R ;IF AT THE END, DONE
MOVEI FX,-FKPT(T1) ;GET FORK INDEX
LOAD T2,FKJOBN ;GET JOB NUMBER
MOVSI CX,1 ;AN INCREMENTOR
ADDB CX,JOBCLS(T2) ;ONE MORE ON GOLST
TLNE CX,777776 ;FIRST ONE?
JRST COUNT6 ;NO
HRRZ T2,JOBCLS(T2) ;GET CLASS
INCR CLGLC,(T2) ;INCREMENT COUNT
COUNT6: HRRZ T1,FKPT(FX) ;GET NEXT FORK
JRST COUNT5 ;AND STEP
;ADJUST GOLST COUNTS WHEN A JOB CHANGES CLASSES
; T1/ OLD CLASS
; T2/ JOB #
CHGCNT: SAVEAC <FX> ;SAVE A REG
HRRZ T4,JOBCLS(T2) ;GET NEW CLASS
SKIPN FX,GOLST ;ANYTHING ON GOLST?
RET ;NO
CHGCN0: SUBI FX,FKPT ;GET FORK #
LOAD T3,FKJOBN ;GET JOB #
CAIE T3,0(T2) ;SAME AS TARGET?
JRST CHGCNX ;NO
DECR CLGLC,(T1) ;YES. ONE LESS IN OLD CLASS
INCR CLGLC,(T4) ;AND ONE MORE IN NEW CLASS
RET
CHGCNX: HRRZ FX,FKPT(FX) ;GET NEXT ITEM
JUMPN FX,CHGCN0 ;DO IT
RET ;ALL DONE
;ROUTINE TO CHANGE CLASS FOR A JOB.
; T1/ NEW CLASS
; T2/ JOB NUMBER
;MUST BE IN THE SCHEDULER
CHGCLS: ASUBR <NCLASS,JOBNOM>
CAMN T2,JOBNO ;THIS JOB?
CALL [ SAVET ;YES
CALLRET UCLOCK] ;UPDATE CLOCKS
SKIPGE JOBRT(T2) ;HAS JOB LOGGED OUT
RET ;YES, DON'T CHANGE ITS CLASS
HRRZ T3,JOBCLS(T2) ;GET CURRENT CLASS VALUE
SOS CLSCNT(T3) ;ONE LESS IN THIS CLASS
AOS CLSCNT(T1) ;ONE MORE IN THIS CLASS
HRRM T1,JOBCLS(T2) ;SET NEW CLASS
SKIPN CLASSF ;DOING CLASS SCHEDULING?
RET ;NO .DONE THEN
MOVEM T3,NCLASS ;SAVE OLD CLASS IN NEW CLASS PLACE
CALL ADJCLS ;ADJUST CLASS PARAMETERS
MOVE T1,NCLASS ;GET BACK OLD CLASS
CALL ADJCLS ;AND ADJUST THIS AS WELL
MOVE T2,JOBNOM ;RECOVER JOB NUMBER
CALLRET CHGCNT ;AND ADJUST GOLST COUNTS
;ROUTINE TO SET CLASS PARAMETERS
; T1/ SHARE OF MACHINE TO GET
; T2/ CLASS #
CRTSHR: MOVEM T1,CLSSHR(T2) ;SET CLASSES SHARE
MOVE T1,T2 ;GET CLASS I.D.
CALLRET ADJCLS ;GO ADJUST CLASS PARAMETERS
;ROUTINE TO ADSJUST CLSSHI AND CLSQ WHEN SOMETHING CHANGES
; T1/ CLASS
ADJCLS: SKIPN T2,CLSCNT(T1) ;ANY MEMBERS OF THIS CLASS?
MOVEI T2,1 ;NO. ASSUME ONE FOR CONVENIENCE
HRRZS T2 ;GET POPULATION COUNT ONLY
FLTR T2,T2 ;GET FLOAT OF POPULATION
MOVE T3,CLSSHR(T1) ;GET CLASS'S SHARE
FDVR T3,T2 ;GET EACH MEMBER'S FAIR SHARE
MOVEM T3,CLSSHI(T1) ;SAVE IT
RET ;DONE
;ROUTINE USED BY CACCT AND LOGIN TO SET CLASS OF JOB.
; T1/ CLASS TO SET
SETCLS::ASUBR <CLSNUM> ;SAVE INCOMING ARG
SKIPL T1,CTRLTT ;ATTACHED?
CALL CHKBCH ;SEE IF A BATCH JOB
JRST SETCL0 ;NO. PROCEED
IFQN. CLSBD,
SKIPE JOBSKD ;ALREADY PRIORITZED?
ANSKP.
MOVE T1,JOBNO ;NO. GET JOB NUMBER
MOVX T2,DREGS ;GET DREGS PRIORITY WORD
SJPRI ;SET PRIORITY WORD
ERJMP .+1 ;IF FAILED, PROCEED ANYWAY
ENDIF.
LOAD T1,CLSBT ;GET BATCH CLASS
SOSGE T1 ;IF A BATCH CLASS, USE IT
SETCL0: MOVE T1,CLSNUM ;GET CLASS
JE CLSAC,,R ;IF NOT USING ACCOUNTS, RETURN NOW
NOSKED ;OWN MACHINE
SKIPL T1 ;VALID CLASS?
CAIL T1,MAXCLS ;""
SETZM T1 ;NO. USE ZERO THEN
MOVE T2,JOBNO ;GET JOB NUMBER
HRRZ T3,JOBCLS(T2) ;GET PRESENT CLASS
CAIE T3,0(T1) ;CHANGING?
CALL CHGCLS ;YES
OKSKED ;ALL DONE
RET ;""
;ROUTINE CALLED WHEN LOGIN WILL SUCCEED.
SKDLOG::TMNN CLSAC ;CLASS BY ACCOUNT?
SKIPN CLASSF ;NO. CLASS SCHEDULING OFF THEN?
RET ;YES. NOTHING TO DO
GTOKM (.GOCL0,,R) ;IF FAILURE, USE DEFAULT
RET ;AND DONE
;QUEUE PARAMETER TABLES
RADIX 10
;QUANTA FOR EACH QUEUE (IN HIGH PRECISION UNITS)
;HEURISTIC: A JOB SHOULD GET AT LEAST A FULL LOWEST QUEUE QUANTUM
;BEFORE FALLING TO LOW QUEUE AND THEREBY YEILDING TO ALL THE COMPUTE
;BOUND JOBS. HENCE, THE SUM OF QUANTA FOR QUEUES 0 TO MAXQ-1
;SHOULD BE .GE. THE QUANTUM FOR MAXQ
;DEFINE PROTO TABLE FOR BIAS CONTROL
QUANTB: 300*NTMS
300*NTMS ;QUICK INTERACTIVE QUEUE
1000*NTMS ;REGULAR INTERACTIVE
3000*NTMS ;MIDDLE QUEUE
3000*NTMS ;NORMAL COMPUTE QUEUE
10000*NTMS ;"DREGS" QUEUE
NQUEUE==:.-QUANTB ;NUMBER OF QUEUES
RS QUANTT,NQUEUE ;ACTIVE QUANTA TABLE
;DEFINE PROTO TABLE FOR CLASS SCHEDULER
QUANTC: 300*NTMS
300*NTMS
1000*NTMS
2000*NTMS
3000*NTMS
10000*NTMS
IFN .-QUANTC-NQUEUE,<PRINTX QUANTA TABLE LENGTHS DIFFER>
HIGHQ==0 ;SPECIAL HI PRI QUEUE
INTQ0==1 ;QUICK INTERACTIVE QUEUE
INTQ1==INTQ0+1 ;REGULAR INTERACTIVE QUEUE
LOWQ==:NQUEUE-1 ;SPECIAL LOW-PRIORITY QUEUE
MAXQ==:LOWQ-1 ;NORMAL LOW QUEUE
BQUANT: 100*NTMS ;QUANTUM GIVEN FOR PSI 'BUMP'
DEFINE GETFLQ(N)<
EXP N'.0
>
FLOWQ: GETFLQ(\LOWQ)
MFRKWD==:JP%SYS ;PRIORITY WORD FOR JOB 0
RADIX 8
RS QSUM,NQUEUE ;ACCUMULATED RUNTIMES OF QUEUES
RS LQWBAS,<LOWQ-INTQ0> ;# OF WORDS IN TABLE
;NON-CLASS BIASES
NSKBAS: 1B4 ;BASE FOR NOSKED FORK
CSKBAS: <NQUEUE-LOWQ+1>B8 ;BASE FOR CRSKED FORK, BETTER THAN LOW Q
TBASE: XX==NQUEUE-1
REPEAT NQUEUE,<
<XX+1>B8-1
XX==XX-1>
;ROUTINE TO INIT QUANTT TABLE
;FIRST, TO INIT TO BIAS CONTROL SETTINGS
QBIAS: SKIPA T1,[QUANTB,,QUANTT]
;NOW FOR CLASS SCHEDULER
QCLASS: MOVE T1,[QUANTC,,QUANTT]
BLT T1,QUANTT+NQUEUE-1 ;DO TABLE
RET ;AND DONE
;HEURISTIC FOR ADJUSTING QUEUE LEVEL AFTER I/O WAIT
;THIS ROUTINE IS THE PRINCIPLE CONTROL OVER THE EXTENT TO WHICH
;'INTERACTIVE' OR 'COMPUTE-BOUND' JOBS ARE FAVORED. IT GIVES
;PRIORITY 'CREDIT' TO A FORK AS A RESULT OF WAITING. THE MORE
;CREDIT GIVEN FOR A CERTAIN LENGTH WAIT (OR THE SHORTER THE WAIT
;REQUIRED TO BECOME HIGH-Q), THE MORE THE SYSTEM WILL FAVOR
;INTERACTIVE FORKS, AND THE GREATER THE CHANCE THAT FREQUENT OR
;WELL-TIMED INTERACTIONS WILL GIVE A PROCESS AN EXCESSIVELY LARGE
;SHARE OF COMPUTE TIME. IT HAS BEEN DEMONSTRATED HOWEVER, THAT
;A COMPLETELY 'FAIR' ALGORITHM HERE, I.E. ONE WHICH PREVENTS AN
;INTERACTIVE FORK FROM GETTING ANY GREATER SHARE OF THE MACHINE
;THAN A COMPUTE-BOUND FORK, IS HIGHLY UNSATISFACTORY TO INTERACTIVE
;USERS UNDER MEDIUM AND HEAVY LOADS (AND ALL USERS ARE INTERACTIVE
;SOMETIMES), AND RESULTS IN EXPONENTIALLY INCREASING LEVELS OF
;FRUSTRATION, CURSING AND BEATING OF TERMINALS, ETC. THEREFORE
;THIS ROUTINE IS GENUINELY A HEURISTIC, MODIFIED AS A RESULT OF
;PRESSURES BROUGHT TO BEAR ON SYSTEM PROGRAMMERS.
;THE FOLLOWING DESCRIBES THE CURRENT PRACTICE:
; 1. TTY INPUT WAITS OF .GE. 1 SEC GIVE HIGH-Q. GREATLY REDUCES
; USER FRUSTRATION LEVEL.
; 2. WAITS BY FORKS ON QUEUE 0 RESULT IN NO CHANGE TO Q VALUE
; 3. FORKS ON QUEUES 1 TO MAXQ-1 WILL BE HIGH-Q IF WAITING TIME IS
; LONGER THAN LAST RUNTIME AS IMPLIED BY Q LEVEL.
; 4. FORKS ON MAXQ WILL BE HIGH-Q IF WAITING TIME IS LONGER THAN
; THE MAXQ QUANTUM, AND WILL BE MOVED UP TO MAXQ-1 IF WAITING
; TIME IS LONGER THAN SOME 'MINIMAL' TIME (500 MS)
;'WAITING TIME' ABOVE MEANS ACTUAL ELAPSED WAITING TIME
;DIVIDED BY THE 1-MINUTE LOAD AVERAGE. THIS KEEPS 'WELL-TIMED'
;INTERACTIONS FROM USING MORE THAN ABOUT 1/LDAV OF THE CPU.
;COMPUTE NEW Q VALUE
NEWST: MOVE T1,TODCLK ;CALCULATE ACTUAL WAITING TIME
SUB T1,FKPGST(FX)
ADDM T1,FKTIME(FX) ;DON'T COUNT WAIT TIME
CAIGE T1,^D100 ;ABOVE MIN WAIT TIME?
JRST [ LOAD T1,FKQN ;NO, NO CHANGE
JRST NEWSTX]
SETZRO <BSNST,BSOVRD> ;YES, NOTE
CAIGE T1,^D2000 ;ABOVE THRESHOLD?
IFSKP.
CALL NEWWSS ;RESET WS SIZE
ENDIF.
IMULI 1,NTMS ;CONVERT TO HIGH PRECISION UNITS
TXNE F,SK%TTP ;CONSIDER INTERACTIONS?
CAMGE 1,[^D1000*NTMS] ;YES, ABOVE MIN WAIT TIME?
JRST NEWST2 ;NO FOLLOW REGULAR ALGORITHM
HRRZ 2,FKSTAT(FX)
CAIE T2,TCOTST ;TTY OUTPUT?
CAIN T2,TTOBET
TXNN F,SK%TOP ;YES, SKIP IF WANT TTY OUTPUT PRIORITY
CAIN T2,TCITST ;TTY INPUT?
JRST [ HLRZ T2,FKSTAT(FX) ;YES
CALL CKPHYT ;IS IT A PSEUDO TTY?
JRST NEWST2 ;FOR PTY, FOLLOW NORMAL ALGORITHM
JRST NEWST1] ;NO, BE MORE GENEROUSL
NEWST2: TXNE F,SK%WCF ;CONSIDER LOAD AVG?
JRST NEWST5 ;NO
MOVE 2,IRJAV ;AV NUMBER RUNNABLE FORKS
CAILE T2,2
IDIV T1,T2 ;WAIT CREDIT INV PROP'L TO LOAD AV
NEWST5: MOVE T2,T1
LOAD T1,FKQN ;CURRENT QUEUE
CAIG T1,INTQ1 ;ONE OF THE HIGHEST?
JRST NEWSTX ;YES, NO CHANGE
CAMGE T2,QUANTT+MAXQ-1 ;WAITED FULL QUANTUM?
JRST [ LOAD T3,FKQTM ;NO, JUST CREDIT REMAINING QUANTUM
ADD T3,T2
CAML T3,QUANTT(T1) ;MORE THAN FULL?
JRST NEWST3 ;YES, REQUEUE ON SAME QUEUE
STOR T3,FKQTM ;UPDATE REMAINING QUANT
JRST NEWSTX]
IDIV T2,QUANTT+MAXQ-1 ;CREDIT ONE QUEUE FOR EACH QUANTUM USED
SUB T1,T2
CAIGE T1,INTQ1+1 ;BUT KEEP OFF INTERACTIVE QUEUES
MOVEI T1,INTQ1+1
JRST NEWST3 ;SET NEW QUEUE
;ESTABLISH VALUES FOR NEW QUEUE
NEWST1: CALL NEWWSS ;SET NEW WS SIZE
CALL INIQ ;GET INITIAL INT QUEUE
NEWST3: MOVE 2,QUANTT(1)
STOR 2,FKQTM ;SET NEW QUEUE VALUE
STOR 1,FKQN ;SET NEW QUEUE NUMBER
MOVE 2,TODCLK
MOVEM 2,FKTIME(FX)
NEWSTX: LOAD T3,FKMNQ ;GET MIN QUEUE
CAML T1,T3 ;WITHIN RANGE?
RET ;YES, DONE
MOVE T1,T3 ;NO, USE MIN
JRST NEWST3 ;AND SET VALUES
;ADJUST WS SIZE AFTER BLOCK
NEWWSS: SAVEAC <T1>
HRRZ T1,FKWSP(FX) ;SET NR TO MAX(6, WSP)
CAMGE T1,MINWSS ;ABOVE MIN WS SIZE?
MOVE T1,MINWSS ;NO, SET TO IT
LOAD T2,FKWSS ;GET CURRENT SIZE
CAMLE T2,T1
CALL ADJWSS ;CHANGE FKNR FOR FORK
RET
;SELECT INITIAL QUEUE FOR FORK
INIQ: MOVEI T1,INTQ1
TXNN F,SK%RQ1
SKIPE CLASSF ;ALWAYS USE FIRST INTQ IF CLASS SCHED
MOVEI T1,INTQ0 ;USE SECOND INT QUEUE
RET
;BUMP PRIORITY OF FORK SO PSI WILL BE HANDLED PROMPTLY. GIVE
;GIVE PRIORITY TO SEE IF PSI IS OF INTEREST.
; FX/ FORK INDEX
; CALL PSBUMP
; RETURN +1 ALWAYS
PSBUMP: CALL CHKBMP ;SEE IF NEED BUMP PRIORITY
RET ;NO. SO RETURN NOW
JN FKBLK,,R ;IF NOW BLOCKED, DONE
CALL GLREM ;REMOVE FROM GOLST
CALLRET GOCONC ;AND REQUEUE WITH NEW PRIORITY
;ROUTINES USED BY SJPRI AND SPRIW TO CAUSE PSI FOR FKMNQ UPDATE
;INTERRUPT SPECIFIC PROCESS
; T2/ SYSTEM FORK HANDLE
SETPRF::MOVX T1,PSIPRI
CALLRET PSIGR ;AND COMPLETE TASK
SUBTTL HLTJB - Halt job
;Here in top fork of job that is on its way out
HLTJB:: HRRE 6,CTRLTT
JUMPL 6,HLTJB1 ;IF JOB DETACHED
CALL LCKDVL ;LOCK DEVICE LOCK, GO NOINT
MOVE 2,6
CALL TTYDAS ;DEASSIGN CTRLTT
JRST HLTJB3 ;GO CHECK FOR ERROR OR DISMISS
UNLOKK DEVLKK ;UNLOCK THE DEVICE LOCK
OKINT ;DEVLCK WENT NOINT
HLTJB1: MOVE 5,JOBNO
SETOM CTRLTT ;CLEAR CONTROL TTY WORDS
HRROS JOBPT(5)
CALL UNMAPD ;UNMAP THE DIRECTORY AND RELEASE ITS OFN
SETZM JOBM0+JSBPG ;CLEAR FAKE JSB MAPPING
MOVE FX,FORKX ;THIS FORK.
HRRZ 1,FKJOB(FX) ;GET JSB
CALL WTSPT ;WAIT FOR IT TO BE UNSHARED
SETZ 1,
HRLZ 2,FKJOB(FX) ;GET SPTN OF JSB
HRRI 2,JOBMAP-JSBPGA
MOVEI 4,JSLST-JSBPG
CALL MSETP1 ;CLEAR JOB MAP
HRLZ 2,FKPGS(FX)
HRRI 2,PPLOW
SETZ 1,
MOVEI 4,PPHI+1-PPLOW
CALL MSETP1 ;CLEAR ALL PAGES OF PROCESS MAP
HRRZ 1,FKJOB(FX) ;JSB
CALL WTSPT ;WAIT FOR IT TO BE UNSHARED
CALL WTFPGS ;WAIT FOR PSB AND UPT TO BE IN NO MAPS
ENTSKD ;ENTER SCHED
MOVE T2,JOBNO ;RELEASE JOB NUMBER
SETZM JOBDIR(T2) ;CLEAR DIRECTORY NUMBER
SETOM JOBRT(T2) ;INDICATE JOB NUMBER NOT IN USE
HRRZ T1,JOBCLS(T2) ;SAVE CLASS OF JOB
ADDI T2,JOBPT
EXCH T2,FREJOB ;PUT SLOT ON FREE LIST
MOVEM T2,@FREJOB
SOS CLSCNT(T1) ;ONE LESS JOB IN THIS CLASS
MOVE T2,JOBNO ;GET THE JOB NUMBER
CAME T2,MJBUSE ;WAS THIS THE HIGHEST JOB IN USE?
IFSKP.
DO.
SOS T2,MJBUSE ;YES. NO LONGER IN USE
SKIPGE JOBRT(T2) ;PREVIOUS JOB IN USE?
LOOP. ;NO. DISCOUNT IT TOO
OD.
ENDIF.
SKIPE CLASSF ;DOING CLASS SCHEDULING?
CALL ADJCLS ;NOW UPDATE CLASS VALUES
JRST HLTFK2 ;FLUSH THIS LAST FORK
;LOCAL MSETPT - BUGCHK ON FAILURE
MSETP1: CALL MSETPT ;CLEAR ALL PAGES OF JOB MAP
BUG(MAPCLF)
RET
;HLTJB CONTINUED..
;DEASSIGN OF JOB CONTROLLING FAILED
HLTJB3: TXZN T1,1B0 ;FAILED. NEED TO WAIT?
BUG(TTDAS1)
UNLOKK DEVLKK ;YES. UNLOCK THE DEVICE LOCK
OKINT ;LCKDVL WENT NOINT
HRL T1,CTRLTT ;T1/(LINE NUMBER,,ADDRESS OF ROUTINE)
MDISMS ;WAIT UNTIL DEALLOCATION IS POSSIBLE
JRST HLTJB ; AND TRY AGAIN
;FINISH DELETE OF FORK
HLTFK1::ENTSKD ;ENTER SCHEDULER
HLTFK2: CALL REMBSJ ;REMOVE FORK FROM BAL SET
CALL REMWSN ;REMOVE WS WO POSTPURGING
CALL GLREM ;REMOVE FORK FROM GOLST
HRRZ 1,FKJOB(FX) ;JSB
CALL GETSHR ;GET SHARE COUNT
MOVE 2,1 ;SAVE IT
HRRZ 1,FKJOB(FX) ;GET BACK JSB
CAIN 2,1 ;LAST USE OF JSB?
IFSKP.
CALL DWNSHR ;NO. REDUCE SHARE COUNT
ELSE.
CALL DESPT ;YES, DELETE IT (LOGOUT CASE)
ENDIF.
HLRZ 1,FKPGS(FX) ;UPT
CALL DESPT ;DELETE IT
LOAD T1,FSSPTN ;GET STACK I.D.
CALL DESPT ;RELEASE IT AS WELL
HRRZ 1,FKPGS(FX)
CALL DESPT ;DEASSIGN PSB
SETOM FORKX
MOVEI T1,FKPT(FX)
EXCH T1,FREFK ;PUT FORK NUMBER ON FREE LIST
TLO T1,400000
MOVEM T1,@FREFK
CALL FKGC ;CLEAN UP ALL PAGES OF FORK
HRRZ 1,FKWSP(FX) ;MAKE SURE FORK CLEANED UP
HRRZ 2,FKCNO(FX)
CAIN 1,0
CAIE 2,0
BUG(FRKNDL)
CALL SETPSK ;SET TO SCHED CONTEXT SINCE PSB GONE
JRST SCHED0 ;NOW THERE IS NOTHING LEFT OF JOB...
;WAIT FOR PSB AND UPT TO HAVE SHARE COUNT OF 1
WTFPGS::HRRZ 1,FKPGS(FX) ;PSB
CALL WTSPT
LOAD T1,FSSPTN ;GET STACK PAGE
CALL WTSPT ;WAIT FOR THIS AS WELL
HLRZ 1,FKPGS(FX) ;UPT
WTSPT:: PUSH P,4
WTSPT2: MOVE 2,1 ;SAVE 1 SINCE WTSPTT CLOBBERS IT
JSP 4,WTSPTT ;TEST PAGE NOW
JRST WTSPT1 ;MUST WAIT
POP P,4 ;NOW OK
RET
WTSPT1: MOVSI 1,0(2)
HRRI 1,WTSPTT
MDISMS
HLRZ 1,1
JRST WTSPT2
WTSPTT::CALL GETSHR ;GET SHARE COUNT
CAIE 1,1
JRST 0(4)
JRST 1(4)
SUBTTL Fork initialization
FKSET: MOVE 1,UPP ;GET USUAL MON STACK
MOVEM 1,PIAC+P ;PUT IN AC17
MOVE T1,[IOWD NPSIPG*PGSIZ,PSIPGA] ;SET UP STACK POINTER
MOVEM 1,PSIPT ;PSI STORAGE STACK
MOVEI 1,<UACB>B39-1 ;SETUP AC BASE
MOVEM 1,ACBAS
CALL FKSETK ;SETUP HWPT STUFF
MOVX T1,<NOP>
MOVEM T1,FRKNOP
MOVE 1,INTDF0 ;INTERRUPT SWITCHES
MOVEM 1,INTDFF
MOVE 1,MJRST0
MOVEM 1,MJRSTF
XMOVEI 1,PSISV1
MOVEM 1,PIPC+2
SETZM PIPC+1 ;INSURE FLAGS 0
SETZM NSKED
SETZM CRSKED
SETZM SNPPGS ;INITIALIZE SNOOP BREAK POINTS
SETZM SNPLST ; NONE TO START WITH
SETOM PSISYS ;INIT PI SYSTEM OFF
MOVE 1,RSKEDN
MOVEM 1,RSKED
MOVSI 1,<MOVEM 1,0>B53
MOVEM 1,PATU40 ;SETUP INSTRUCTION PART FOR COMPAT
MOVEM 1,PATUPC ;ENTRY PROCEDURE
MOVEM 1,DMSU40 ;SET UP FOR DMS CALLS
MOVEM 1,DMSUPC
SETOM SLOWF
SETOM INTDF
SETOM TRAPC
MOVE 1,NPMAX ;INIT LOCAL NPMAX TO SYSTEM NPMAX
MOVEM 1,FNPMAX
SETOM FKTAB
MOVEI 1,FKTAB+1
HRLI 1,-1(1)
BLT 1,FKTAB+NLFKS/2-1
SETZM JTTRW ; Clear JSYS trap word
SETZRO JTFRK ; Clear trapped fork
MOVEI T1,7777 ; We haven't interrupted anyone yet
STOR T1,JTMNI ; ...
MOVEI T1,77 ; And we don't want to be interrupted
STOR T1,JTMCN
MOVE T1,[IFIW!FKJTB] ; Put under top fork's environment
MOVEM T1,JTBLK ; until CFROK can update to FKJTB+forkn
SETOM JTLCK ; Clear lock
MOVE FX,FORKX
CALL FKSETP ;SETUP PSB AND UPT POINTERS
MOVEI T1,NPSIPG ;MUST CREATE ALL PI PAGES
MOVEI T2,PSIPGA ;THE FIRST ONE
FKSET4: SETZM 0(T2) ;CREATE THIS ONE
ADDI T2,PGSIZ ;NEXT PAGE
SOJG T1,FKSET4 ;DO ALL OF THEM
MOVE 6,PIMSK ;GET REQUEST BITS
;See if this is part of job creation. If yes, go initialize the job.
TXNE 6,NEWJB% ;NEW JOB TOO?
JRST FKSET1 ;YES
HRRZ 1,FKJOB(FX) ;GET JSB
CALL UPSHR ;BUMP SHARE COUNT
XMOVEI 1,FKSET2
FKSET3: MOVEM 1,PIPC
SETZM PIFL
SETZM PIOLDS
JRST PIRQR ;DEBREAK - RUN IN NORMAL MODE
;INIT NEW JOB
;Here when NEWJB% was set in PIMSK during fork initialization.
FKSET1: HRREI T2,0(6) ;GET NUMBER OF CONTROLLING TTY, IF ANY
LOAD 1,FKJOBN ;GET JOB NUMBER
MOVEM 1,JOBNO
STOR T2,JBTTY,(T1) ;TTY ASSIGNED TO JOB
FKSE01: PUSH P,T1 ;SAVE JOB NUMBER
MOVE T1,FORKX ;SET FORKX INTO THIS TTY'S PSI DESTINATION
SKIPL T2 ;IF THERE IS A TTY,
CALL STTOPF ; PUT IN THE FORKX
POP P,T1 ;RESTORE JOB NUMBER
HRRZ T2,JOBCLS(1) ;GET CLASS OF THIS JOB
MOVE T1,T2 ;GET CLASS
SKIPE CLASSF ;IF DOING CLASS SCHEDULING, ADJUST
CALL ADJCLS ;AND SET UP PARAMETERS
CALL LGTAD ;GET CURRENT TIME
MOVEM T1,SRTTIM ;REMEMBER TIME JOB STARTED (MAYBE -1)
MOVNI T1,1 ;INITIALLY SET CONTROLLING TERMINALS TO -1
MOVSI T2,-NUFKS ;DO FOR ALL FORKS
ICTTY: STOR T1,FRKTTY,(T2)
AOBJN T2,ICTTY ;LOOP FOR ALL FORK SLOTS
MOVE T1,JOBNO
HLRE T2,JOBPT(T1) ;CONTROLLING TTY, IF ANY, -1 IF NONE
MOVEM T2,CTRLTT ;IN JSB
LOAD T1,FKJSB ;GET JSB IDENT
MOVE T2,SHRPTR ;CONSTRUCT JSB MAPPING
STOR T1,SPTX,T2
MOVEM T2,JOBM0+JSBPG
SETZM @JTBLK ; No jsys traps for top fork
MOVEI T1,DCOPNM ;DEFAULT MAX DECNET LINKS
STOR T1,DCMAX ;TO THE JSB
MOVEI T1,ATJBMX ;MAXIMUM HTN'S FOR A JOB
STOR T1,JSAMX ;STORE IN JSB
XMOVEI T1,EXEC0 ;RUN AT EXEC0
JRST FKSET3
;Here when PSI processing is complete. FKSET stored this location in FPC,
;and process is continued here after the interrupt.
FKSET2: XCTU [SETZM 0] ;CLEAR USER AC'S
MOVEI CX,1
XBLTUU [BLT CX,17]
ENTSKD
SETZM PPC ;SET PC 0
MOVSI 1,(UMODF)
MOVEM 1,PFL
MOVEI 1,HALTT
JRST DISMSE
SUBTTL Software Interrupt Service
INTDF0: SOS INTDF ;NORMAL CONTENTS OF INTDFF
MJRST0: XJRSTF FFL ;NORMAL CONTENTS OF MJRSTF
CHNSON::EXP 1B9+1B11+1B12+1B15+1B16+1B17+1B18+1B20 ;ALWAYS ON PSI CHANS
;SCHEDULER CAUSES JOB TO BE STARTED HERE ON PI REQUEST
;SAVED PC IN PIPC, FLAGS IN PIFL
;PIMSK CONTAINS INTERRUPT REQUEST WORD
;Here from main scheduler loop if FKINT indicates interrupt is pending
;(bit FKPSI1 is on).
;PCU is set so that previous context references go to user
;FKINT has been copied to PIMSK
PIRQ: MOVEM P,PIAC+17
MOVEI P,PIAC ;SAVE USER AC'S
BLT P,PIAC+16
MOVE P,PIPDL ;SET UP LOCAL STACK
MOVE P2,TRAPFL
MOVE P3,KIMUFL
MOVE P4,TRAPPC ;SAVE IMMEDIATELY VULNERABLE CELLS
MOVE P5,KIMUPC
MOVE P6,KIMUEF
MOVE FX,PIMSK ;INTERRUPT REQUEST WORD
MOVE Q2,FORKX
SETZ 2,
;Save wait state at time of interrupt
TXZE FX,PSIWT% ;WAS JOB IN WAIT STATUS?
MOVE 2,FKSTAT(Q2) ;YES, GET OLD STATUS
MOVEM 2,PIOLDS ;SAVE OLD STATUS, OR 0 IF WAS RUNNING
;Determine reason for interrupt and go handle some cases.
TXZE FX,NEWFK% ;START NEW FORK?
JRST FKSET ;YES
TXZE FX,PSIT1%
JRST PSIT1 ;TERMINAL, PHASE 1
TXZE FX,PSIT2%
JRST PSIT2 ;TERMINAL, PHASE 2
TXZE FX,PSITL% ;TIME LIMIT EXCEEDED INTERRUPT?
JRST TLEINT ;YES, GO INTERRUPT THE FORK
TXZE FX,PSIPRI ;SET PRIORITY WORD?
JRST PRISET ;YES. GO FIX UP DATA BASE
PSITR1: TXNE FX,PSIIF%+SUSFK%+PSILO%+PSICO%+PSIJT%+ADRBK%
JRST PSII ;CHANNEL INTERRUPT SPEC. BY FKINTB
;Here to finish the interrupt.
;Restore data as before the interrupt and allow rescheduling.
PIRQR: CALL UNPIR ;LEAVE PI STATE
PSIDF1: SKIPN 1,PIOLDS ;WAS RUNNING BEFORE PSI?
JRST SCHED0 ;YES
CAIE 1,TRMTS1 ;WAITING FOR ARBITRARY FORK TERM?
JRST DISMSE ;NO, RETURN TO WAIT STATE
SETZM PIOLDS ;CLEAR OLD STATE
XMOVEI 1,WFORKA ;GO BACK INTO JSYS TO DO TEST
MOVEM 1,PPC ; AND MAKE THIS THE PC
SETZM PFL ; SET FLAGS
JRST SCHED0 ;GO RESCHEDULE THIS PROCESS
;LEAVE PSI CONTEXT. RETURN THROUGH SCHEDULER
;Leaves with P pointing to SKDPDL
;Caller set up PIFL and PIPC to point to where process should start running.
;PIOLDS contains 0 if process is runnable.
UNPIRN: TDZA T1,T1 ;DON'T REQUEUE IF BUMPED
UNPIR: MOVEI T1,1 ;CONDITIONAL REQUEUE IF BUMPED
AOS INSKED ;ENTER SCHEDULER
POP P,CX ;GET LOCAL RETURN
MOVE P,PI7P ;SETUP SCHED STACK
PUSH P,CX ;PUT LOCAL RETURN ON IT
PUSH P,T1 ;SAVE ENTRY FLAG ON STACK
MOVEM P2,TRAPFL
MOVEM P3,KIMUFL
MOVEM P4,TRAPPC ;RESTORE VULNERABLE CELLS
MOVEM P5,KIMUPC
MOVEM P6,KIMUEF
MOVE 1,[XWD PIAC,PAC]
BLT 1,PAC+17 ;PUT AC'S BACK
JSP FX,KISSAV ;SAVE APR-DEPENDENT STUFF
MOVE 1,PIFL
MOVEM 1,PFL
MOVE 1,PIPC
MOVEM 1,PPC
MOVX T1,FKPSI1 ;IN-PSI FLAG
MOVE FX,FORKX
TDNN T1,FKINT(FX)
BUG(UNPIRX)
ANDCAM 1,FKINT(FX)
JE PIBMP,,[POP P,0(P) ;CLEAN UP THE STACK
RET] ;AND DONE
SETZRO PIBMP ;CLEAR BUMPING
POP P,CX ;GET BACK ENTFLG
SKIPE CX ;REQUEUEING WANTED?
SKIPE PIOLDS ;YES. CONTINUE AS RUNNABLE?
RET ;NO. DONE THEN
SAVET ;YES. SAVE ALL REGS
CALL GLREM ;REMOVE FROM GOLST
CALLRET GOCONC ;AND DONE
PIPDL: IOWD NPIPDL,PIPDB ;INTERRUPT ROUTINES LOCAL PDL
;REQUEST PSEUDO INTERRUPT
;IIC TO SELF - FOR MONITOR INTERNAL USE. FASTER THAN IIC AND DOES
;NOT REQUIRE PROCESS TO BE ABLE TO SET FKLOCK.
; 1/ CHANNEL MASK
; CALL IICSLF
; RETURN +1 ALWAYS
;PSIRQ0 - SAME AS IICSLF EXCEPT TAKES CHANNEL NUMBER IN 1 RATHER THAN MASK
PSIRQ0::MOVE 1,BITS(1) ;GET MASK FOR CHANNEL
IICSLF::TDNN 1,PSICHM ;SEE IF INTERRUPT WILL BE TAKEN
TDNE 1,CHNSON
JRST IICSL1 ;YES
TDNN 1,SUPCHN
RET ;NO, DON'T SEND IT
IICSL1: NOINT
MOVE 2,FORKX
CALL PSIRQB ;REQUEST THE INTERRUPT
OKINT
CHKINT ;GET IT PROCESSED IF POSSIBLE
RET
;GENERAL PSI REQUEST HANDLER
; 1/ CHANNEL MASK FOR PSIRQB, CHANNEL NUMBER FOR PSIRQ
; 2/ FORK INDEX
; CALL ...
; RETURN +1 ALWAYS
;VARIENTS:
; PSITQ - CHANNEL BITS ALREADY SET, JUST REQUEST CHECK
; PSIGR - T1/ MASK FOR OTHER REQUESTS
PSIRQ:: MOVE 1,BITS(1)
PSIRQB::HRRZS 2
IORM 1,FKINTB(2) ;SET BIT IN INTERRUPT WAITING BUFFER
PSITQ: MOVX T1,PSIIF% ;REGULAR INTERRUPT FLAGS
PSIGR:: TXO T1,FKPSI0
IORM 1,FKINT(2)
CAMN 2,FORKX ;FOR THIS FORK?
RET ;YES
PSIR4:: NOSKD1
PUSH P,FX
MOVEI FX,0(2)
MOVE 1,FKINT(FX)
TXNE T1,FKPSI1 ;FORK NOW INTERRUPTABLE?
JRST PSIR61 ;NO
IFQN. FKBLK,
MOVX 1,PSIWT% ;YES, SET FLAG
IORM 1,FKINT(FX)
CALL UNBLK1 ;WAKE UP THE FORK
ENDIF.
PUSH P,3
CALL PSBUMP ;NO, GIVE FORK 'BUMP' TO GET PSI HANDLED
POP P,3
PSIR61: MOVEI 2,0(FX)
POP P,FX
OKSKD1
RET
;TERMINAL INTERRUPT
;PHASE ONE - CALLED FROM TERM SERVICE ROUTINES
; 2/ LINE NO., 3/ INTERRUPT CODE
;SEND TO TOP FORK TO FIND PROPER DESTINATION
TTPSRQ::PUSH P,T3 ;SAVE INTERRUPT CODE
CALL GTCJOB ;GET CONTROLLING JOB
TTPSRX: JRST [ POP P,T3 ;NONE (SHOULDN'T HAPPEN)
RET]
CAIN T3,-1 ;IS THERE A CONTROLLING JOB?
JRST TTPSRX ;NO. SHOULDN'T HAPPEN
HLRZ T4,JOBPT(T3) ;GET THE JOB'S CONTROLLING LINE
CAIE T4,0(T2) ;IS IT THIS LINE?
JRST TTPSR2 ;NO, LOOK ELSEWHERE IN THAT JOB
HRRZ 2,JOBPT(3) ;GET INDEX OF TOP FORK
TTPSR1: POP P,T3 ;RESTORE INTERRUPT CODE
STOR 3,TRMCOD,FKINT(2) ;INTERRUPT CODE
MOVX T1,PSIT1% ;PHASE ONE REQUEST
CALLRET PSIGR
TTPSR2: CALL GTTOPF ;GET TOP FORK OF TTY'S CTTY GROUP
JRST TTPSRX ;THAT TTY ISN'T ACTIVE
MOVEI T2,(T3) ;COPY THE FORKX
CAIL T2,NFKS ;IS IT VALID? (ELSE -1 FOR NONE)
JRST TTPSRX ;NO
JRST TTPSR1 ;YES, GO INTERRUPT THIS FORK
;ROUTINES TO HANDLE INTERRUPT CONDITIONS AS SPECIFIED BY BITS
;IN LEFT HALF OF FKINT
;TERMINAL INTERRUPT, PHASE ONE
;THIS CODE RUN IN TOP FORK ONLY
;Here when PSIT1% is set in FKINT
PSIT1: LOAD Q2,TRMCOD,FX ;GET TERM INTERRUPT CODE
MOVE Q2,BITS(Q2)
HRRZ 1,FORKN ;START WITH TOP FORK
LOAD T4,FRKTTY,(T1) ;GET CONTROLLING TERMINAL
SETO Q1,
TDNE Q2,FKPSIE(1) ;TERM CODE ON IN FORK?
MOVEI Q1,0(1) ;YES, REMEMBER FORK
CALL PSIT1A ;LOOK AT ALL INFERIORS
JUMPL Q1,PSIT11 ;NOT FOUND, SO TURN OFF CODE
HRRZ 2,SYSFK(Q1) ;GET SYSTEM INDEX OF FORK TO GET INTERPT
CAMN 2,FORKX ;THIS FORK?
JRST PSIT2 ;YES, GO DIRECTLY TO PHASE TWO
NOSKED
LOAD T1,TRMCOD,FX ;NO. GET TERM INTERRUPT CODE
STOR T1,TRMCOD,FKINT(T2) ; AND SET UP INT FOR PROPER FORK
MOVX 1,PSIT2% ;PHASE TWO REQUEST FLAG
CALL PSIGR
OKSKED
JRST PSITR1
PSIT11: CAIN T4,-1 ;SOURCE OF PSI = JOB CTTY?
JRST PSIT12 ;YES
TRZN T4,1B18 ;MAYBE, CONVERT TO LINE #
JRST PSITR1 ;DESIGNATOR, NOT TTY. RETURN.
CAMN T4,CTRLTT ;CTTY OF JOB?
JRST PSIT12 ;YES
CAIGE T4,NLINES ;VALID TTY NUMBER?
CAIGE T4,0
JRST PSITR1
JRST PSIT13 ;YES
PSIT12: ANDCAM Q2,TTSPSI ;NOT FOUND, SO TURN OFF CODE
SKIPGE T2,CTRLTT
JRST PSITR1
PSIT13: MOVE T1,Q2 ;T1/ INTERRUPT BIT
CALL CLRINT ;CLEAR THE INTERRUPT IN TERMINAL'S DATA
JRST PSITR1
;SEARCH FORK STRUCTURE FOR FORK TO INTERRUPT
; T4/ DESIGNATOR OF SOURCE OF THIS PSI
PSIT1A::ADD 1,INFERP ;LOOK AT INFERIOR LIST
PSIT1B: LDB 1,1 ;GET NEXT IN LIST
JUMPE 1,R ;RETURN AT END OF LIST
LOAD T2,FRKTTY,(T1) ;GET CONTROLLING TERMINAL
CAIE T2,0(T4) ;IS IT THE ONE THAT MADE THIS PSI?
JRST PSIT1E ;NO, SO DON'T CONSIDER FORK.
HRRZ 2,SYSFK(1) ;CHECK STATE OF FORK
PUSH P,FX ;SAVE FX
MOVEI FX,0(T2) ;SEE IF THIS FORK IS FROZEN OR HALTED
CALL CHKWT ; ..
JRST [ POP P,FX ;IT'S NOT.
JRST PSIT1D]
POP P,FX ;YES, SEE WHICH
HRRZ T3,FKSTAT(T2) ;GET ITS STATE
CAIN T3,FRZWT ;FROZEN?
JRST PSIT1G ;YUP
CAIE T3,HALTT ;NO, HALTED OR FORCED TERM?
CAIN T3,FORCTM ; ..
JRST PSIT1C ;YES.
PSIT1D: TDNE Q2,FKPSIE(1) ;FORK HAS CODE ENABLED?
MOVEI Q1,0(1) ;YES, REMEMBER IT
PSIT1E: HRLM T1,0(P) ;REMEMBER CURRENT FORK
CALL PSIT1A ;CHECK ITS INFERIORS
HLRZ T1,0(P) ;RECOVER CURRENT FORK
XMOVEI T2,20 ;RESTORE RETURN ADDRESS
HLLM T2,0(P)
PSIT1C: ADD T1,PARALP ;LOOK AT ITS PARALLELS
JRST PSIT1B ;DO PARALLELS
PSIT1G: MOVX T3,JTFRZ% ;FORK FROZEN. BY JSYS TRAP?
TDNN T3,FKINT(T2) ; ..
JRST PSIT1C ;NO. ORDINARY FREEZE
MOVX T3,FRZBB% ;YES. ONLY TRAP, OR OTHERS TOO?
TDNE T3,FKINT(T2) ; ..
JRST PSIT1C ;OTHERS TOO. DON'T CONSIDER THIS FK
JRST PSIT1D ;NO, JUST JSYS TRAP. IT MAY STILL
; TAKE THE PSI, SO CONSIDER THIS FK.
;FORK STRUCTURE POINTERS
SUPERP::POINT 12,FKPTRS,11 ;SUPERIOR
PARALP::POINT 12,FKPTRS,23 ;PARALLEL
INFERP::POINT 12,FKPTRS,35
;TERMINAL INTERRUPT, PHASE TWO
;Here when PSIT2% is set in FKINT or directly from PSIT1.
PSIT2: LOAD T1,TRMCOD,FX ;GET TERM INTERRUPT CODE
CALL GETCHA
LDB 2,2
MOVE 1,BITS(2) ;AND SET BIT IN INT. WAITING WORD
AND 1,PSICHM ;BUT ONLY FOR ENABLED CHANNELS
IORM 1,PSIBW
JRST PSII ;THEN GO PROCESS IT
;TIME LIMIT EXCEEDED INTERRUPT
;ROUTINE TO ISSUE TIME LIMIT EXCEEDED INTERRUPT
; RUN BY TOP FORK OF JOB ONLY
;Here when PSITL% is set in FKINT
TLEINT: MOVE T1,JOBNO ; Get the job
LOAD T2,JOBRTP,(T1) ; And then ptr to runtime limit blk
JUMPE T2,PSITR1 ; If none, then don't do this
PUSH P,T2 ; Save so we can release blk
LOAD T1,TIMCHN,(T2) ; Channel for poke
LOAD T2,TIMFRK,(T2) ; And fork to poke
CALL PSIRQ
POP P,T4 ; Blk to be released
CALL CLKKIL ; Release storage for clock
MOVE T1,JOBNO
SETZRO JOBRTP,(T1) ; And finally clear the ptr
JRST PSITR1 ;CONTINUE ON
;PRIORITY WORD WAS SET. COMPUTE NEW FKMNQ
;Here when PSIPRI is set in FKINT
PRISET: PUSH P,FX ;SAVE INT BITS
MOVE FX,FORKX ;GET FORK HANDLE
SKIPN T1,JOBBIT ;GET LOCAL PRIORITY WORD
MOVE T1,JOBSKD ;GET JOB PRIORITY WORD
LDB T1,[POINT 6,T1,29] ;GET HIGH Q NUMBER FROM PRIORITY WORD
STOR T1,FKMNQ ;NEW MIN Q FOR PROCESS
POP P,FX
JRST PSITR1 ;PROCEED
;SUSPEND FORK REQUEST
;Here when SUSFK% is set in FKINT
PIRSFK: MOVE 1,FX ;GET PIMSK
MOVE FX,FORKX
TXZ 1,FKPSI0+SUSFK% ;CLEAR THIS REQUEST
IORM 1,FKINT(FX) ;KEEP OTHER REQUESTS
DMOVE 1,PIFL
CALL PITEST ;NOW INTERRUPTABLE?
JRST PIRSF1 ;NO
MOVEI 3,SUSWT ;SUSPENDED FORK TEST
PIRSK1: MOVE 2,FORKX
MOVX 1,SUSFK%
ANDCAM 1,FKINT(2)
CALL UNPIRN ;LEAVE INTERRUPT STATE
IORM 1,FKINT(FX) ;KEEP INTERRUPT STARTING BIT
MOVEI 1,0(3) ;SUSWT OR FRZWT
HRL 1,PIOLDS ;WITH OLD STATUS
PUSH P,T1
MOVEI T1,SUSFKT
CALL WAKSUP ;WAKEUP SUPERIOR IF WAITING FOR SUSP
POP P,T1
JRST DISMSE ;DISMISS
PIRSF1: MOVE FX,FORKX
NOSKED ;
HRRZ T1,FKSTAT(FX) ;
CAIN T1,JTQWT ; IN JSYS TRAP QUEUE WAIT?
JRST PIRSF2 ; YES, ALLOW SUSPENSION
OKSKED ;
MOVX 1,SUSFK% ;TURN REQUEST BIT BACK ON
IORM 1,FKINT(FX)
JRST PSIDFR ;AND SET DEFERRED INTERRUPTS
PIRSF2: MOVEI T1,FKJTQ(FX) ; FORK IN JSYS TRAP QUEUE WAIT
CALL JTDEQ ; REMOVE IT FROM QUEUE
XMOVEI T1,JTRLCK ; SET RESUME ADDR. TO LOCK ROUTINE
SETZM PIOLDS ;
SETZM PIFL
MOVEM T1,PIPC ;
OKSKED ;
MOVEI T3,SUSWT ;
JRST PIRSK1 ;
SUSWT:: JRST 0(4) ;SCHEDULER TEST FOR SUSPENDED FORK
;CARRIER OFF ACTION REQUEST
;Here when PSICO% is set in FKINT
PIRCOF: DMOVE T1,PIFL
CALL TFTEST ;INTERRUPT OK NOW?
JRST [ MOVE FX,FORKX ;NO, SETUP DEFER
MOVX T1,PSICO% ;KEEP REQUEST
IORM T1,FKINT(FX)
JRST PSIDFR] ;GO SET DEFER
MOVX T1,PSIWT% ;SEE IF PROCESS WAS WAITING
TDNE T1,PIMSK ;WAS IT?
SOS PIPC ;YES. MAKE IT GO BACK INTO WAIT THEN
MOVX T1,PSICO% ;GET THE BIT FOR THIS CONDITION
MOVE FX,FORKX ;GET THIS FORK'S ID
ANDCAM T1,FKINT(FX) ;CLEAR THIS CONDITION (NECESSARY
; IF THIS WAS DEFERRED).
XMOVEI T1,JOBCOF ;SET TO DEBREAK TO ACTION PROCEDURE
JRST PIRLG1
;LOGOUT REQUEST
;Here when PSILO% is set in FKINT
PIRLGO: DMOVE T1,PIFL
CALL TFTEST ;OK TO INTERRUPT?
JRST [ MOVE FX,FORKX ;NO, REMEMBER REQUEST
MOVX T1,PSILO%
IORM T1,FKINT(FX)
JRST PSIDFR]
XMOVEI T1,FLOGO
PIRLG1: SETZM PIOLDS ;MAKE FORK RUNNABLE
EXCH T1,PIPC
SETZ T2, ;ZERO NEW PIFL
EXCH T2,PIFL ;GET FLAGS, SET NEW ONES FOR DEBREAK
TXNN T2,UMODF
SKIPGE SLOWF
JRST [ MOVEM T1,FPC ;IN USER MODE, SIMULATE JSYS
MOVEM T2,FFL
JRST PIRQR]
MOVE T2,PIAC+17 ;IN MON MODE, SIMULATE PUSHJ
PUSH T2,T1
MOVEM T2,PIAC+17
MOVX T1,PCU ;GET THE MASK FOR PCU
IORM T1,PIFL ;AND TURN IT ON
JRST PIRQR
;SPECIAL TEST USED BEFORE INTERRUPT TOP FORK FOR LOGOUT OR CARRIER OFF
TFTEST: CALL PITEST ;INTERRUPTABLE NORMALLY?
RET ;NO, NOT HERE EITHER
MOVX T2,LOGIOB
TDNE T2,JOBBIT ;LOGGING IN OR OUT?
RET ;YES, NO INTERRUPT
RETSKP ;NO, INTERRUPT OK
; JSYS TRAP REQUEST
;Here when PSIJT% is set in FKINT
PIRJTP: DMOVE T1,PIFL ; Pick up flags
CALL PITEST ; FORK INTERRUPTABLE?
JRST PIRJT1 ; NO, DEFER IT
MOVX T1,PSIJT% ;
MOVE FX,FORKX ; IN CASE THIS PSI WAS DEFERRED
ANDCAM T1,FKINT(FX) ; CLEAR IT FROM FKINT
LOAD T1,JTMCN ; GET PSI CHANNEL FOR TRAP
MOVE T1,BITS(T1) ;
IORM T1,PSIBW ; SET BIT IN INT WAITING WORD
SETZ FX, ;
JRST PSII ; GO PROCESS THE TRAP
PIRJT1: MOVE FX,FORKX ; DEFER THE JSYS TRAP PSI
MOVX T1,PSIJT% ;
IORM T1,FKINT(FX) ;
JRST PSIDFR ;
;ADDRESS BREAK REQUEST - FREEZE FORK AND INTERRUPT SUPERIOR
;Here when ADRBK% is set in FKINT
PIRABK: MOVE T1,FX ;GET REQUEST BITS
MOVE FX,FORKX ; AND FORK INDEX
TXZ T1,FKPSI0+ADRBK% ;CLEAR BITS FOR THIS REQUEST
IORM T1,FKINT(FX) ;SAVE OTHERS
DMOVE T1,PIFL ;GET INTERRUPTED PC DOUBLEWORD
CALL PITEST ;INTERRUPTABLE?
JRST PIRBK1 ;NO
MOVX T1,FRZB1%+ABFRZ% ;YES, INDICATE FREEZE DUE TO ADDR BRK
IORM T1,FKINT(FX) ; ..
MOVX T1,ADRBK% ;CLEAR ORIGINAL REQUEST BIT
ANDCAM T1,FKINT(FX) ; ..
CALL FKTMI ;INTERRUPT SUPERIOR FORK
CALL UNPIRN ;LEAVE PSI CONTEXT
SETZM PIOLDS ;SET OLD STATE TO RUNNING
MOVEI T1,FRZWT ;WAIT LIST ON WHICH WE WISH TO LIVE
JRST DISMSE ;DISMISS
PIRBK1: MOVX T1,ADRBK% ;RE-LIGHT REQUEST BIT
IORM T1,FKINT(FX) ; ..
JRST PSIDFR ;AND DEFER THE INTERRUPT
;PROCESS INTERRUPT(S) FOR THIS FORK AS SPECIFIED BY FKINTB
;THIS CODE *CAN* CAUSE PAGE FAULTS WHEN REFERENCING THE USER
;CHANNEL AND LEVEL TABLES.
;FX/ flags from FKINT
PSII: MOVE 1,MJRST0 ;NORMALIZE ALL DEFER TRAPS
MOVEM 1,MJRSTF
MOVE 1,INTDF0
MOVEM 1,INTDFF
;DETERMINE REASON FOR THE INTERRUPT AND GO PROCESS IT.
TXNE FX,SUSFK% ;FORK SUSPENSION REQUEST?
JRST PIRSFK ;YES
TXNE FX,PSILO% ;LOGOUT REQUEST?
JRST PIRLGO
TXNE FX,PSICO% ;CARRIER OFF REQUEST?
JRST PIRCOF ;YES
TXNE FX,PSIJT% ; JSYS trap requested?
JRST PIRJTP ; Yes
TXNE FX,ADRBK% ;ADDRESS BREAK REQUEST?
JRST PIRABK ;YES, HANDLE
;HERE BECAUSE BIT PSIIF% IS SET IN FKINT, INDICATING A CHANNEL
;INTERRUPT. FKINTB HAS BIT SET FOR EACH CHANNEL THAT NEEDS TO
;INTERRUPT.
MOVE 2,FORKX
MOVEI 1,0
EXCH 1,FKINTB(2) ;RESET FKINTB TO 0
IORM 1,PSIBW ;INCLUDE IN PROCESS WAITING BREAKS
MOVE 1,PSICHM ;USERS ENABLED CHANNELS
IOR 1,CHNSON ;WITH ALWAYS ON CHANNELS
IOR 1,SUPCHN ;WITH SUPERIOR RESERVED CHANNELS
SKIPN 3,PIOLDS ;WAS FORK WAITING?
IFSKP.
SKIPN FORKN ;AND NOT TOP FORK?
ANSKP.
MOVEI 3,0(3) ;YES, HALT OR FORCED TERM?
CAIE 3,HALTT
CAIN 3,FORCTM
JRST PIRQR ;YES. IGNORE REQUEST UNTIL LATER
ENDIF.
ANDB 1,PSIBW ;FLUSH DISABLED CHANS
JUMPE 1,PIRQR ;RETURN IF NO BREAKS WAITING
;..
;..
;Here when an interrupt is pending and it is enabled (or a panic channel)
DMOVE 1,PIFL ;PROCESS PC
CALL PITEST ;CAN PROCESS BE INTERRUPTED NOW?
JRST PSIDFR ;NO, GO SETUP DEFERRED INTERRUPT
MOVE 1,PSIBW
TDNE 1,MONCHN ;MONITOR RESERVED CHANNEL?
JRST PSIMB ;YES
TDNN T1,CHNSON ;PANIC CHANNEL?
JRST PSIN5 ;NO
;Panic channel. If ERJMP follows user's instruction, go there.
DMOVE T1,PIFL ;YES, CHECK FOR ERJMP/ERCAL
TXNE T1,UMODF ;USER PC NOW?
IFSKP.
DMOVE T1,UPDL ;NO, GET IT
EXCH T1,T2 ;(IN PROPER ORDER)
ENDIF.
CALL SETPCV ;SET PREVIOUS CONTEXT FOR ITRSIM
CALL ITRSIM ;CHECK AND INTERPRET ER INSTRUCTION
JRST PSIN6 ;NONE THERE, CONTINUE WITH INTERRUPT
MOVEM T3,PIPC ;FOUND, SET PC TO E OF INSTRUCTION
MOVEM T1,PIFL ;AND FLAGS TO USER FLAGS
MOVE T3,CHNSON ;CLEAR INTERRUPT REQUEST
ANDCAM T3,PSIBW
JRST PIRQR ;RETURN TO USER
;Not a panic channel, or panic channel with no ERJMP. Terminate the process if
;it can't take the interrupt or the superior wants it.
PSIN6: MOVE T1,PSIBW
PSIN5: AND 1,SUPCHN ;LOOK AT SUPERIOR RESERVED CHANS
JUMPN 1,PSIN3 ;TERMINATE IF ANY
MOVE 1,PSIBW
AND 1,CHNSON ;LOOK AT SPECIAL CHANNELS
SKIPE PSISYS ;IF THIS PROCESS NOT TAKING PSI'S,
JUMPN 1,PSIN3 ;TERMINATE IT IF ANY SPECIALS
ANDCM 1,PSICHM ;AND'ING WITH USER'S 'OFF' CHANNELS
JUMPN 1,PSIN3 ;TERMINATE CAUSE CHANNEL NOT ACTIVE
SKIPE PSISYS ;PSI SYSTEM ON?
JRST PIRQR ;NO
SKIPN PSLEVT ;THIS PROCESS TAKING INTERRUPTS?
JRST PSIN1 ;NO, GO TRANSMIT THE PSI
;..
;..
;PSIBW (AND AC 1) HAS A BIT SET FOR EACH CHANNEL TO GIVE AN INTERRUPT.
;CHECK THEM ALL TO FIND THE HIGHEST PRIORITY (LOWEST LEVEL NUMBER)
XJRSTF [PCU+MSEC1
MSEC1,,.+1] ;SET PCS SO EXT REFS WORK
MOVE 1,PSIBW ;GET CHANNELS NEEDING INTERRUPTS
MOVEI 2,0 ;INIT CHANNEL NUMBER
MOVSI 3,1 ;INIT LOWEST LEVEL
PSIS4: JFFO T1,PSIS2 ;JUMP WITH FIRST CHN FOUND IN T2
JRST PSIS10 ;NO MORE. GO FINISH
;T2/ CHANNEL NUMBER
;T3/ PREVIOUS LOW LEVEL NUMBER
PSIS2: ANDCM T1,BITS(T2) ;DON'T LOOK AT THIS BIT NEXT TIME
MOVE 4,PSCHNT ;GET ADR OF USER'S CHANNEL TABLE
ADDI 4,0(2) ;COMPUTE ADR OF USER'S CHANNEL WORD
UMOVE T4,@T4 ;GET LEVEL NUMBER FOR THIS CHANNEL
ERJMP PSIN1
JN PSXSIR,,[
LOAD T4,SILEV,T4 ;GET LEVEL NUMBER
JRST PSIS3]
HLRZS T4 ;GET LEVEL NUMBER
PSIS3: CAILE 4,NPILEV ;LEGAL LEVEL?
SETZ 4, ;NO, TREAT AS 0
CAIG 3,0(4) ;OLD LEVEL GREATER THAN CURRENT?
JRST PSIS4 ;NO
MOVEI 3,0(4) ;YES, REMEMBER NEW LEVEL
MOVEI Q1,0(2) ;AND CHANNEL NUMBER
JRST PSIS4 ;RESUME SCAN
;HERE WHEN ALL BITS HAVE BEEN LOOKED AT.
;T3/ LEVEL OF HIGHEST PRIORITY INTERRUPT FOUND
;Q1/ CORRESPONDING CHANNEL NUMBER
PSIS10: JUMPE 3,PSID1 ;NO LEVEL ASSIGNED? GO XMIT INTERRUPT
MOVE 1,BITS(3)
CAMG 1,PSIBIP ;OK TO BREAK ON THIS LEVEL?
JRST [ MOVE 2,PSIBW ;NO, .GE. PRIORITY LEVEL IN PROGRESS
TDNN 2,CHNSON ;BREAKS ON PANIC CHNS WAITING?
JRST PIRQR ;NO, HOLD WAITING BREAKS
MOVE 1,2
JRST PSIN3] ;YES, MUST TERMINATE
IORM 1,PSIBIP ;YES, REMEMBER BREAK THIS LEVEL
MOVE 1,PSCHNT ;GET ADR OF USER'S CHANNEL TABLE
ADDI 1,0(Q1) ;COMPUTE ADR OF USER'S CHANNEL WORD
UMOVE T4,@1 ;GET LEVEL + ADDR OF USER'S INT ROUTINE
ERJMP PSIN1 ;IF FAILED, TERMINATE
JN PSXSIR,,[
ANDX T4,SIADR ;IF EXTENDED, GET ROUTINE ADDRESS
JRST PSIS9]
HLL T4,PSCHNT ;APPLY SECTION USED IN SIR JSYS
;User has provided routine address for this level.
; T4/ address
PSIS9: MOVE 1,PIFL ;GET FLAGS WHEN INTERRUPTED
EXCH 4,PIPC ;GET PC WHEN INTERRUPTED,SAVE NEW PC
TLNN 1,(UMODF) ;WAS IN USER MODE?
JRST PSISM ;NO, MUST SAVE MONITOR CONTEXT
HLLZM T1,PIFL ;PRESERVE USERS FLAGS
;..
;HERE WHEN MONITOR CONTEXT HAS BEEN SAVED (IF NECESSARY). READY TO
;STORE PC INTO USER'S LEVTAB. PIFL AND PIPC ARE SET UP FOR GOING TO
;USER'S INTERRUPT ROUTINE.
; T1/ FLAGS TO GO INTO LEVTAB
; T4/ PC TO GO INTO LEVTAB
; Q1/ CHANNEL NUMBER
;..
PSIS5: SETZM PIOLDS
MOVE 2,PSLEVT ;GET ADR OF USER'S LEVEL TABLE
ADDI 2,-1(3) ;COMPUTE ADR OF USER'S LEVEL WORD
UMOVE 2,@2 ;GET ADR OF PC WORD FOR THIS LEVEL
ERJMP PSIN1 ;IF FAILED, TERMINATE
JN PSXSIR,,[
UMOVEM T1,@T2 ;SAVE FLAGS WORD
ERJMP PSIN1 ;QUIT IF FAILED
AOS T2
UMOVEM T4,@T2 ;SAVE PC WORD
ERJMP PSIN1 ;QUIT IF FAILED
JRST PSID3]
HRR T1,T4 ;COMBINE PC
XOR T4,PSLEVT ;SEE IF SECTIONS ARE THE SAME
TLNE T4,-1 ;ARE THEY?
JRST PSIN1 ;NO. ERROR THEN
HLL T2,PSLEVT ;FORCE CORRECT SECTION
UMOVEM 1,@2 ;STORE BREAK PC IN USER'S MEMORY
ERJMP PSIN1 ;IF FAILED, TERMINATE
PSID3: MOVE 1,BITS(Q1) ;CLEAR WAITING BREAK BIT FOR THIS CHANNEL
ANDCAM 1,PSIBW
JRST PIRQR ;TO USER
;MONITOR ROUTINE IS SHORTSTOPPING INTERRUPTS - SIMULATE JSYS MONBK
;MONBK/(where to store flags and PC,,new PC)
;Copy new PC to PIPC, and stores flags and PC where MONBK points to
PSIMB: HRRZ 1,MONBK ;ROUTINE ADDRESS
EXCH 1,PIPC ;GET OLD PC
MOVE 3,PIFL ;GET FLAGS
SETZM PIFL ;SET MONITOR
SETZM PIOLDS
HLRZ 2,MONBK ;RET LOC
MOVEM 3,0(2) ;STORE FLAGS FOR RETURN
MOVEM 1,1(2) ;STORE RETURN
JRST PIRQR
;HERE WHEN INTERRUPTED OUT OF MONITOR CONTEXT. SAVE ALL RELEVANT
;INFO BEFORE GIVING THE INTERRUPT.
;THIS CODE SAVES ONTO A SPECIAL PSI STACK. IT USES AC FX AS ITS STACK
;POINTER. THE DEBRK JSYS USERS THIS INFORMATION TO CONTINUE THE INTERRUPTED
;JSYS
;T1/ FLAGS AT TIME OF INTERRUPT (FROM PIFL)
;T4/ PC AT TIME OF INTERRUPT (FROM PIPC)
PSISM: HLRZ 2,BITS(3) ;NO, REMEMBER MONITOR INTERRUPT
IORM 2,PSIBIP ;IN RH OF BIP WORD
MOVE FX,PSIPT ;STORAGE STACK POINTER
MOVE P1,FX ;SAVE POINTER
PUSH FX,1
PUSH FX,4 ;SAVED PC AND FLAGS
;SAVE A SET OF IMPORTANT CELLS. SAVCT CONTAINS A LIST OF THEM.
MOVSI Q2,-NSAVC ;SAVE VULNERABLE CELLS
PUSH FX,@SAVCT(Q2)
AOBJN Q2,.-1
;SAVE THE UPDL STACK
MOVSI Q2,UPDL ;STORE ENTIRE MONITOR STACK
HRRI Q2,1(FX)
ADD FX,[XWD NUPDL,NUPDL]
JUMPGE FX,PIOVFW ;IF POSITIVE NO ROOM
BLT Q2,0(FX)
;STORE THE CURRENT CONTEXT AC'S AT THE TIME OF THE INTERRUPT
MOVSI 1,PIAC ;STORE CURRENT MONITOR AC'S
HRRI 1,1(FX) ;NOW LIVING IN PIAC
ADD FX,[XWD 20,20]
JUMPGE FX,PIOVFW ;IF POSISTVE NO ROOM
BLT 1,0(FX)
;..
;SAVE ALL AC BLOCKS (THOSE IN ACBAS BLOCKS AND PREVIOUS
;CONTEXT AC'S)
;..
HRRZ 1,ACBAS ;STORE ALL AC BLOCKS IN USE
SUBI 1,<UACB>B39-1 ;COMPUTE NUMBER BLOCKS IN USE
JUMPLE 1,PSISM1 ;JUMP IF NONE
MOVEI T2,1(FX) ;SAVE PREVIOUS CONTEXT ACS
ADD FX,[20,,20]
JUMPGE FX,PIOVFW ;IF POSITIVE NO ROOM
XBLTUM [BLT T2,0(FX)]
MOVSI T2,UACB ;PUT USER ACS BACK INTO AC BLOCK
XBLTMU [BLT T2,17]
MOVSI 2,UACB ;SETUP TO BLT ENTIRE AC STACK
HRRI 2,1(FX) ; .. TO PSI STACK ..
LSH 1,4 ;COMPUTE NUMBER WORDS IN USE
HRLI 1,0(1) ;NUMBER OF WORDS BOTH HALFS
ADD FX,1
JUMPGE FX,PIOVFW ;IF POSITIVE NO ROOM
BLT 2,0(FX)
PSISM1: PUSH FX,1 ;SAVE COUNT FOR DEBRK
PUSH FX,ACBAS ;AND CURRENT ACBAS
MOVE 1,UPP ;RESET MON STACK
MOVEM 1,PIAC+P
HLLZ 1,UPDL+1 ;USER FLAGS AT MONITOR CALL
TXO T1,UMODF ;MAKE DAMN SURE IT'S USER MODE
MOVEM T1,PIFL ;PRESERVE USERS FLAGS
MOVE T4,UPDL ;GET PC AT JSYS ENTRY
PUSH FX,P1 ;PSI STACK BEFORE ALL THIS PUSHING
PUSH FX,1 ;SAVE FLAGS AT JSYS ENTRY
PUSH FX,T4 ;SAVE PC AT JSYS ENTRY
MOVEM FX,PSIPT ;SAVE CURRENT STACK POINTER
TLZ 1,(UMODF) ;SO HE CAN TELL IT WAS MON INTERRUPT
SETOM SLOWF
JRST PSIS5 ;FINISH INTERRUPT START
PIOVFW: BUG(PSISTK)
;XMIT INTERRUPT TO SUPERIOR FORK
PSIT: HRRZ 2,FORKN
ADD 2,SUPERP ;GET SUPERIOR
LDB 2,2
HRRZ 2,SYSFK(2) ;SYSTEM FORK INDEX
CALLRET PSIRQ ;REQUEST INTERRUPT
;THIS FORK WON'T TAKE INTERRUPT, DISMISS IT AND RECORD WHY
;Get the channel number
PSID1: MOVEI 2,0(Q1) ;CHANNEL WITH NO LEVEL ASSIGNED
JRST PSIN2
;Determine channel number from waiting interrupts
PSIN1: MOVE 1,PSIBW ;INTERRUPTS OFF OR NO LEVCHN
PSIN3: JFFO 1,.+1 ;CALCULATE CHANNEL NUMBER
;T2/ channel number on which interrupt was attempted
PSIN2: MOVEM 2,FORCTC ;SAVE CHANNEL NUMBER FOR STATUS
MOVE 1,BITS(2) ;JUST ONE CHANNEL AT A TIME
ANDCAM 1,PSIBW ;RESET WAITING BIT
MOVE 1,CAPENB
TLNE 1,(1B17) ;SUPERIOR WANTS FROZEN STEAD HALT?
JRST [ CALL FKTMI ;YES. GO INTERRUPT IT THEN
MOVEI 3,FRZWT ;AND GET PROPER STATUS
JRST PIRSK1] ;AND GO DO THE FREEZE
CALL GETSFX ;GET SUPERIOR FORK INDEX
MOVE Q2,1 ;SAVE IT
CALL UNPIRN ;LEAVE PI STATE, MOVE AC'S ETC.
MOVE P,PI7P
MOVE 1,Q2 ;RECOVER SUPERIOR FORK INDEX
HRRI 1,FORCTM
JRST DISMSE ;THIS ONE IS BEING DISMISSED
;GET SUPERIOR FORK INDEX FOR HALT OR FORCED TERMINATION
GETSFX: HRRZ 1,FORKN
ADD 1,SUPERP ;MAKE POINTER TO SUPERIOR
LDB 1,1
HRLZ 1,SYSFK(1) ;PUT INDEX IN LH FOR DISMISS TEST WORD
RET
FORCTM::JRST 0(4) ;SCHEDULER TEST FOR FORCED TERM FORK
;INTERRUPT SUPERIOR FORK ON TERMINATION
FKTMI: HRRZ 1,FORKN
SKIPN 1
SKIPA 1,[^D35] ;TERMINATING TOP FORK, GIVE CH 35
MOVEI 1,TRMINT ;19 IS FORK TERMINATED
CALL PSIT ;TRANSMIT IT
RET
;CONSTRUCT BYTE PTR TO CHANNEL NUMBER FOR TERM CODE
; 1/ TERMINAL CODE
; CALL GETCHA
; RETURN +1: ALWAYS, 2/ BYTE PTR TO CHANNEL NUMBER
GETCHA::MOVEI 2,0(1)
IDIVI 2,6
ADDI 2,PSICHA
HLL 2,CH6TAB(3)
RET
;DEFERRED INTERRUPT LOGIC
;SET TRAPS TO RECHECK INTERRUPTS WHEN STATE CHANGES
;HERE WHEN PROCESS IS NOINT AND CAN'T TAKE AN INTERRUPT. SET UP INTDFF
;AND MJRSTF TO HANDLE THIS LATER
PSIDFR: MOVE 1,MJRST1
MOVEM 1,MJRSTF
MOVE 1,INTDF1
MOVEM 1,INTDFF
CALL UNPIRN ;LEAVE BREAK STARTING STATE
IORM 1,FKINT(FX) ;BUT LEAVE PENDING BIT
CALL CHKBMP ;SEE IF NEED PI BUMPING AGAIN
NOP
JRST PSIDF1 ;RESUME
MJRST1: JRST PSISV0 ;TRY FOR INTERRUPT NOW
INTDF1: XPCW PIFL ;CONTENTS OF INTDFF WHEN TRAP SET
;PIPC+1 CONTAINS JRST PSISV1
;HERE WHEN PROCESS DID AN OKINT AND THERE WAS AN INTERRUPT PENDING FOR
;THE PROCESS. DON'T LET IT TAKE IF PROCESS IS STILL NOINT.
PSISV1: DATAO PAG,SETMON ;SET MON AC BLOCK CURRENT
SOSL INTDF
XJRSTF PIFL ;IF STILL NOINT, PROCEED
JRST PSISV2 ;GO ON
;HERE WHEN PROCESS WENT TO MRETN (TO RETURN FROM A JSYS OR UUO),
;AN INTERRUPT WAS PENDING, AND THE PROCESS HAS BEEN NOINT UNTIL NOW.
;IF JSYS WAS NESTED (I.E., PROCESS IS NOT RETURNING TO USER) AND
;PROCESS IS STILL NOINT, DON'T LET THE INTERRUPT TAKE.
PSISV0: DATAO PAG,SETMON ;SET MON AC BLOCK CURRENT
DMOVEM 1,PIFL ;SAVE AC1
DMOVE 1,FFL ;FFL NOW CONTAINS USER'SPC
TXNE T1,UMODF ;A USER-MODE PC?
IFSKP.
SKIPGE INTDF ;NO. NOW INTERRUPTABLE?
ANSKP.
DMOVE T1,PIFL ;NO. RECOVER AC CONTENTS
XJRSTF FFL ;AND RETURN FROM MUUO
ENDIF.
EXCH 1,PIFL
EXCH 2,PIPC
;Allow deferred interrupt to happen
PSISV2: MOVEM P,PIAC+17 ;SAVE USER'S AC17
MOVEI P,PIAC ;AND AC'S 0-16
BLT P,PIAC+16
MOVE P,PIPDL ;RESTORE INTERRUPT STARTING STATE
MOVE P2,TRAPFL
MOVE P3,KIMUFL
MOVE P4,TRAPPC ;SAVE VULNERABLE CELLS
MOVE P5,KIMUPC
MOVE P6,KIMUEF
SETZM PIOLDS
PSISV3: MOVE 2,FORKX
MOVE FX,FKINT(2)
JRST PSII ;ENTER MAIN SEQUENCE
;TEST FOR IMMEDIATE OR DEFERRED INTERRUPT
;SKIP => IMMEDIATE
;NOSKIP => DEFERRED
;CALLED WITH TEST USER PC IN AC1,AC2
PITEST::TLNE 1,(UMODF) ;USER MODE?
JRST [ SKIPE NSKED ;ARE WE NOSKED?
SKIPN PNSKDC ;YES. SHOULD WE BE BECAUSE OF RESOURCES?
RETSKP ;NO. SAY CAN INTERRUPT THEN
RET] ;YES. DEFER THE INT
SKIPL SLOWF ;NO, SLOW CODE?
SKIPL INTDF ;YES, INTERRUPTABLE
RET ;NO, DEFER
SKIPN CRSKED
SKIPE NSKED ;IN CASE NOSKED W/O NOINT
BUG(PSINSK)
JRST RSKP ;IMMEDIATE
;TEST FOR PI BUMPING NEEDED
; FX/ FORK INDEX
CHKBMP: MOVE CX,FKINT(FX)
TXNE CX,SUSFK%!PSILO%!PSIT1%!PSIT2% ;ANY INTERRUPT BITS ON?
TXNE CX,FKPSI1 ;AND NOT DEFERRING
JRST [ SETZRO PIBMP ;MAKE SURE BIT IS OFF
RET]
SETONE PIBMP ;YES. BUMP IT
RETSKP ;AND INFORM CALLER OF SAME
;DEBREAK
.DEBRK::MCENT
SKIPN PSIBIP ;ANY BREAKS IN PROGRESS?
ITERR DBRKX1 ;NO, ERROR
DMOVE T3,[PCU+MSEC1
MSEC1,,DEBRK1] ;GET NEW PC
XJRSTF T3 ;DO IT
DEBRK1: MOVE 2,FORKX
MOVSI 1,200000
IORM 1,FKINT(2) ;SET INTERRUPT STARTING BIT
SETZM PIOLDS
MOVE 2,PSIBIP ;BREAKS NOW IN PROGRESS
JFFO 2,.+1 ;FIND HIGHEST ONE
MOVE 1,PSLEVT ;COMPUTE ADDRESS OF RETURN PC
ADDI 1,-1(3)
UMOVE 1,@1
JN PSXSIR,,[
XCTU [DMOVE Q1,@T1]
JRST DEBRK2]
HRRZS 1 ;IF OLD STYLE, FORCE SECTION 0 ADDRESS
UMOVE Q1,@1 ;GET RETURN PC FROM USER MEMORY
HRRZ Q2,Q1 ;SAVE THE PC HERE
HLLZS Q1 ;SAVE ONLY FLAGS HERE
HLL Q2,PSLEVT ;APPLY SECTION THAT WAS LOST WHEN STORED
DEBRK2: MOVS 2,BITS(3)
TDNE 2,PSIBIP ;WAS THIS MONITOR INTERRUPT?
JRST DEBRK6 ;YES, GO UNWIND
;HERE TO RETURN CONTROL TO THE USER PROGRAM.
;Q1/ FLAGS FROM LEVTAB
;Q2/ PC FROM LEVTAB
;SEND USER TO THIS LOCATION PRESERVING CERTAIN FLAGS IF THEY WERE
;ON AT ENTRY TO DEBRK
DEBRK3: HLLZ T2,0(P) ;GET FLAGS FROM JSYS ENTRY
MOVE P,PIPDL ;ESTABLISH PI STACK
XOR Q1,T2 ;KEEP PRIVILEGED BITS FROM THIS CALL
TXZ Q1,UMODF+UIOF+PC%AFI+37B17
XOR Q1,T2
MOVEM Q1,PIFL ;SET THIS AS FLAGS FOR PROCEEDING
MOVEM Q2,PIPC ;SET TO DEBREAK AT THAT ADDRESS
SETOM SLOWF ;NORMALIZE FLAGS FOR RETURN TO USER
SETOM INTDF
MOVE 1,UPP
MOVEM 1,PIAC+P
DEBRK4: MOVE 1,BITS(3)
ANDCAM 1,PSIBIP ;CLEAR BIP THIS LEVEL
JRST PSISV3 ;GO CHECK FOR OTHER INTERRUPTS AND RETURN
;HERE BECAUSE INTERRUPT OCCURRED OUT OF MONITOR CONTEXT. PSISM SAVED
;CONTEXT ON PSI STACK. IF PC IN LEVTAB HAS BEEN CHANGED, DON'T CONTINUE
;IN MONITOR. IF UMODF IS ON, USER MUST HAVE SET IT, BECAUSE PSISM
;CLEARED IT BEFORE PUTTING IT IN LEVTAB. PSI STACK CONTAINS FLAGS AND
;PC AT TOP OF UPDL WHEN INTERRUPT OCCURRED. THESE WERE PUT INTO LEVTAB
;BY PSISM.
;Q1/ FLAGS FROM USER'S LEVTAB
;Q2/ PC FROM USER'S LEVTAB
DEBRK6: ANDCAM 2,PSIBIP ;CLEAR MON BREAK FLAG FOR THIS LEVEL
MOVE FX,PSIPT
POP FX,T4 ;PC AT TOP OF UPDL WHEN INTERRUPT
POP FX,T2 ;FLAGS AT TOP OF UPDL WHEN INTERRUPTED
POP FX,PSIPT ;TOP OF THIS BLOCK OF PSI STORAGE
TLOE Q1,(UMODF) ;IF IT WAS DIDDLED AT ALL,
JRST DEBRK5
;NOT NEEDED IF DEBRK3 DOES HLLZ
; HLLZS T2 ;CLEAR RH FLAGS
CAMN Q1,T2 ;DO FLAGS MATCH?
CAME Q2,T4 ;YES. PC MATCH?
;HERE WHEN PC HAS BEEN CHANGED. DON'T PROCEED IN THE MONITOR ROUTINE
;THAT WAS INTERRUPTED. RELEASE ANY RESOURCES THAT THE PROCESS OWNS, AND
;GO SEND THE PROCESS TO THE ADDRESS IN LEVTAB.
DEBRK5: JRST [ MOVE T1,FORKX ;NO. GET FORK HANDLE
HLLZ T2,PSIBIP ;TELL THEM WHAT INTERRUPT LEVEL WE'RE AT
TDZ T2,BITS(T3) ;POINT TO LEVEL WE'RE GOING TO
PUSH P,T2 ;SAVE FOR CALL TO GOKFRE
CALL JSBSTF ;GO PROCESS DEALLOCATION STACK
MOVE T1,FORKX ;GET FORK HANDLE
POP P,T2 ;GET CORRECT LEVEL
CALL GOKFRE ;FREE GETOK ENTRIES
JRST DEBRK3] ;DON'T RESUME MON ROUTINE
;HERE WHEN INTERRUPT OCCURRED FROM MONITOR CONTEXT, AND WE ARE
;RESUMING THE MONITOR ROUTINE. RESTORE CONTEXT AS SAVED BY PSISM
;ON SPECIAL PSI STACK
MOVE P,PIPDL ;ESTABLISH PI PDL
POP FX,ACBAS
POP FX,4 ;GET NUMBER OF WORDS FOR AC BLOCKS
;..
;RESTORE AC STACKS
;..
JUMPLE 4,PDBK1 ;JUMP IF NO AC STACK TO RESTORE
SUB FX,4
MOVEI Q1,UACB
HRLI Q1,1(FX)
ADDI 4,0(Q1)
HRRZS T4
BLT Q1,-1(4) ;RESTORE AC BLOCKS
MOVEI Q1,UACB ;PUT USER ACS BACK ONTO STACK
XBLTUM [BLT Q1,UACB+17]
SUB FX,[20,,20] ;RESTORE PREVIOUS CONTEXT AC'S
MOVSI 2,1(FX)
XBLTMU [BLT 2,17]
;RESTORE AC'S FOR MONITOR
PDBK1: SUB FX,[XWD 20,20]
MOVEI 2,PIAC
HRLI 2,1(FX)
BLT 2,PIAC+17 ;RESTORE MONITOR AC'S
;RESTORE UPDL STACK
SUB FX,[XWD NUPDL,NUPDL]
MOVEI 2,UPDL
HRLI 2,1(FX)
BLT 2,UPDL+NUPDL-1 ;RESTORE STACK
;RESTORE SPECIAL CELLS
MOVEI 2,NSAVC-1 ;RESTORE VULNERABLE CELLS
POP FX,@SAVCT(2)
SOJGE 2,.-1
POP FX,2 ;GET PC AT TIME OF INTERRUPT
MOVEM 2,PIPC ;SAVE PC (PROCESS WILL GO THERE)
POP FX,2 ;GET FLAGS AT TIME OF INTERRUPT
MOVEM 2,PIFL ;SAVE FLAGS
SETZM SLOWF
SETOM INTDF ;BE OKINT
JRST DEBRK4 ;NOW DEBRK
;TABLE OF VULNERABLE CELLS
SAVCT: MPP
FFL
FPC
MONFL
MONPC
PIOLDS
P2
P3
P4
P5
P6
NSAVC==.-SAVCT
SUBTTL JSYS trapping
; Jsys Traps support code (TRAPSI, JTLOCK, JTULCK, etc)..
;TRAP AND PSI ROUTINE EXECUTED WHEN A FORK EXECUTES A TRAPPED JSYS
;CALLED AS FIRST CODE EXECUTED BY THE TRAPPED JSYS (WITH IT'S CONTEXT
;BUT TOTALLY INVISIBLE TO IT)
;P1/ ADDRESS OF FORK'S JTB + P2
;P2/ OFFSET FOR THIS JSYS NUMBER
;P3/ BIT MASK FOR THIS JSYS NUMBER
;P4/ MONITOR'S FORKN
;P5/ TRAP HANDLED FLAG
;P6/ OFFSET TO MONITOR'S PSB
TRAPSI::NOINT ;DON'T INTERRUPT THIS CODE
SUBI P1,(P2) ;GET BACK ADDRESS OF JTB WITHOUT OFFSET
SKIPA P5,[0] ;TRAP HANDLED IF NON-ZERO
TRPSI2: MOVE P1,FKJTB(P4) ;pointer to monitor's JTB
JUMPE P1,TRPSI6 ;if he's not monitored were done
LOAD P4,JTIMP,(P1) ;forkn of monitor's monitor
ADDI P1,(P2) ;add in offset to bit table
TDNN P3,JTBIM(P1) ;HANDLED BY THIS MONTIOR?
JRST TRPSI2 ;no, keep looking up the chain of monitors
SETO P5, ;YES, INDICATE TRAP HANDLED
MOVEI T1,0(P4)
CALL SETLF1 ;MAP PSB OF THE MONITOR
MOVE P6,T1 ;SAVE POINTER TO MONITOR'S PSB
TRPSI4: LOAD T2,JTMCN,(T1)
CAIN T2,77 ;IS CHANNEL SPECIFIED?
JRST TRPSI2 ;NO, DON'T PSI, SEARCH FOR ANOTHER MONITOR
CALL JTLOCK ;YES, SYNCH WITH OTHER TRAPPING FORKS
JRST TRPSI4 ;FORK SUSPENDED AND RESUMED
;WHILE QUEUED, RETRY LOCKING
JSP CX,FRZPSI ;FREEZE SELF AND PSI MONITOR
;RESUMED HERE AFTER TRAP HANDLED IF MONITOR DOES NOT CHANGE PC
;WHEN CONTROL RETURNS TO TRPSI5 ACS P1-5 MUST BE THE SAME AS TRPSI3
TRPSI5::JRST TRPSI2 ;LOOK FOR MORE MONITORS (OF MONITORS)
;RETURN TO THE NORMAL JSYS CODE
TRPSI6: SKIPL P5 ;HAS TRAP BEEN HANDLED AT ALL?
BUG(TRPSIE)
LDB T1,[POINT 9,KIMUU1,26] ; Pick up opcode of trapped guy
CAIE T1,<JSYS>B62 ; Was a JSYS?
JRST TRPSI7 ; No, a UUO
LOAD T1,JTJNO
MOVE CX,JSTAB(T1) ;GET NORMAL DISPATCH
HLLZM CX,FFL ; Restore normal flags
TXZ CX,EXFLBT
MOVEM CX,FPC ; And dispatch
XCTU [DMOVE T1,1] ;RESTORE STANDARD 4 ARGS
XCTU [DMOVE T3,3]
SETZM INTDF ;RESTORE STATE TO ENTRY AT TRAPSI
OKINT ;TURN PSIS BACK ON
XCT MJRSTF ;DO NORMAL DISP FOR THIS JSYS
TRPSI7: SETOM SLOWF ; Untangle ourselves
MOVE P,MPP ; in a state like this
POP P,FFL ; Reset flags
POP P,FPC ; And caller
MOVE P,UPP ; Reset the stack...
SETZM INTDF
OKINT
JRST U10501 ; Return to handle the UUO
;FREEZE AND PSI ROUTINE - FORK INITIATES JSYS TRAP PSI OF
;MONITOR AND THEN FREEZES ITSELF
;P4/ JOB INDEX OF FORK TO PSI
;P6/ OFFSET TO FORKS PSB
FRZPSI: MOVS T4,KIMUU1 ; Pick LH of instruction
HRR T4,KIMUU1+1 ; And then RH
MOVEM T4,JTTRW(P6) ; Set last trapped instruction
HRRZ T4,FORKN
STOR T4,JTFRK,(P6) ; Trapped fork index
STOR P4,JTMNI ;SAVE FORK WE TRAPPED TO FOR UTFRK
ENTSKD ;SAVE ACS ETC.
TXZ CX,EXFLBT
MOVEM CX,PPC ; Save return for DISMSE
MOVE CX,ENSKR ;GET THE RIGHT FLAGS
HLLZM CX,PFL ;FOR RESUME AFTER DISMSE
LOAD T2,JTMNI
HRRZ T2,SYSFK(T2) ;GET FORKX OF MONITOR FORK
MOVX T1,PSIJT%
CALL PSIGR ;MAKE SCHEDULER SEE IT
MOVX T1,FKPSI1+JTFRZ% ;DO "JSYS TRAP" FREEZE OF SELF
IORM T1,FKINT(FX) ;FX=FORKX SET BY ENSKED
SETZM PIOLDS ;"OLD STATE" = RUNNING
MOVEI T1,FRZWT
JRST DISMSE ;DISMS
;JSYS TRAP LOCK AND UNLOCK ROUTINES
;WHEN A FORK TRIES JTLOCK AND SOME OTHER FORK HAS THE
;LOCK, THE FORK ADDS ITSELF TO A QUEUE (FKJTQ) AND BECOMES BLOCKED.
;WHEN THE LOCK IS CLEARED (BY A MONITORING FORK) THE QUEUE IS
;SCANNED FOR THE FIRST FORK (IF ANY) WAITING ON THE LOCK. THAT
;FORK IS REMOVED FROM THE QUEUE AND ALLOWED TO RUN.
;LOCK ROUTINE
;ON ENTRY TO JTLOCK:
;P4/ JOB FORK INDEX (OF FORK TO FIELD TRAP)
;P6/ PTR TO ITS PSB
;RET + 1 IF SUSPENDED AND RESUMED WHILE QUEUED
;RET + 2 WITH LOCK SET
JTLOCK: NOSKED
AOSE JTLCK(P6) ;TRY TO SEIZE THE LOCK
JRST JTLOC2 ;SOMEONE ELSE HAS IT
OKSKED ;GOT IT
JTLOC1: AOS 0(P) ;RET + 2
RET
JTLOC2: JSP CX,JTENQ ;PUT SELF ON JSYS TRAP QUEUE
JRST JTLOC1 ;RETURNS HERE WITH LOCK SEIZED
;IF FORK IS RESUMED AT JTRLCK, IT RETURNS + 1 TO TRAPSI ROUTINE
;FORCING ANOTHER CALL TO JTLOCK AFTER A CHECK TO SEE IF THE TRAP IS
;STILL TO GO TO THE SAME FORK.
JTRLCK: RET
;ROUTINE TO PLACE FORK ON QUEUE
JTENQ: HRL T1,SYSFK(P4) ;1=FORK WAITING ON
HLLZM CX,PFL
TXZ CX,EXFLBT
MOVEM CX,PPC ;SAVE RETURN PC NOW
ENTSKD ;ENTER SCHEDULER
SOSE NSKED ;MATCHED NOSKED IN JTLOCK
BUG(JTENQE)
MOVEI T2,FKJTQ(FX) ;FX=FORKX, SET BY ENSKED
HRRM T2,@JTLSTL ;ADD THIS FORK TO END OF QUEUE
EXCH T2,JTLSTL ;SET NEW END OF QUEUE PTR
MOVSM T2,FKJTQ(FX) ;SET BACK PTR TO OLD QUEUE END
HRRI T1,JTQWT
JRST DISMSE ;DISMS
;JSYS TRAP QUEUE WAIT TEST
JTQWT: MOVE T1,FKINT(FX) ;DID A SUSPEND REQUEST OCCUR
TXNN T1,SUSFK% ;BEFORE BLOCKING?
JRST 0(4) ;NO.
MOVX T1,FKPSI0+PSIWT% ;YES, REINITIATE SUSPEND
IORM T1,FKINT(FX) ;REQUEST PSI
MOVSI T1,200000
ANDCAM T1,FKINT(FX) ;ALLOW PSI'S
PUSH P,3
CALL PSBUMP ;NO, GIVE FORK SOME PRIORITY
POP P,3
JRST 1(4)
;UNLOCK ROUTINE
;USES BUT DOES NOT SAVE ACS 1,2,3,4
JTULCK::HRRZ T2,FORKX
NOSKED
MOVE T1,JTLST ;SCAN QUEUE LOOKING FOR FORK
;WAITING ON EXECUIING FORK
JTULC1: JUMPE T1,JTULC3 ;NONE FOUND
MOVEI T4,0(T1)
SUBI T4,FKJTQ ;4=FORK INDEX OF QUEUED FORK
HLRZ T3,FKSTAT(T4)
CAMN T3,T2 ;THIS FORK WAITING ON EX FORK?
JRST JTULC2 ;YES, REMOVE IT FROM QUEUE
HRRZ T1,0(T1) ;NO, TRY NEXT FORK
JRST JTULC1
JTULC2: CALL JTDEQ ;REMOVE FORK FROM QUEUE
PUSH P,FX ;UNBLOCK FORK
MOVE FX,T4
CALL UNBLK1
POP P,FX
CAIA
JTULC3: SETOM JTLCK ;NO FORKS ON QUEUE, CLEAR LOCK
OKSKED
RET
;REMOVE FORK WHOSE FKJTQ ENTRY IS PT'D TO BY 1 FROM JSYS TRAP QUEUE
;USES BUT DOES NOT SAVE ACS 2,3
JTDEQ: NOSKED
HRRZ T3,(T1) ;3=PTR TO NEXT ITEM ON QUEUE
HLRZ T2,(T1) ;2=PTR TO PREV ITEM
HRRM T3,(T2)
JUMPE T3,JTDEQ1 ;REMOVING LAST ITEM?
HRLM T2,(T3) ;NO
CAIA
JTDEQ1: MOVEM T2,JTLSTL
OKSKED
RET
SUBTTL Context switching for MUUO's
;Here from APRSRV when user or monitor executed an illegal UUO.
ILUUO:: MCENTR
ITERR ILINS1 ;ILLEGAL UUO
;ALL UNDEFINED JSYS'S
UJSYS0::MCENT
UJSYS:: ITERR ILINS2 ;UNDEFINED JSYS
;Here when user executes a TOPS-10 UUO (op codes 40-77). Enter compatibility
;package
UU1050::SKIPE P1,@JTBLK ; JSYS traps?
JRST [ SETZ P2, ; Word 0
MOVSI P3,(1B0) ; Check for JSYS 0 (UUO trapping)
TDNN P3,JTBAL(P1)
JRST .+1 ; Not trapping UUOs
MOVE T1,FORKN ; Get fork number
MOVE T1,SYSFK(T1) ; Is this fork execute only?
TXNE T1,SFEXO ;...
JRST U10501 ;Yes, No trapping in this case
MOVE CX,[PCU+MSEC1B+TRAPSI] ; We are, go JSYS trap route
JRST MENTU1] ; Join JSYS code
U10501::SKIPG T1,PATADR ;GOT PAT NOW?
JRST GETPAT ;NO
TXNN T1,XS%EEV ;EXTENDED FORMAT VECTOR?
IFSKP.
MOVE T1,PATUPC ;YES, GET ITS ADDRESS
DMOVE T2,FFL ;GET FLAGS, PC
XCTU [DMOVEM T2,0(T1)] ;PASS THEM TO PA1050
MOVE T1,PATU40 ;PTR TO UUO WORD
MOVE T2,KIMUEF ;MOVE UUO WORD TO PA1050
UMOVEM T2,0(T1)
ELSE.
MOVE T1,PATUPC ;NON-EXTENDED FORMAT, GET PTR TO PC
MOVE T2,FPC ;CONSTRUCT OLD STYLE FLAGS,,PC
HLL T2,FFL
UMOVEM T2,0(T1) ;PASS IT TO PA1050
MOVE T1,PATU40 ;PTR TO UUO WORD
MOVE T2,KIMUEF ;CONSTRUCT OLD STYLE UUO WORD
HRL T2,FFL
UMOVEM T2,0(T1)
ENDIF.
MOVE T1,PATADR ;SET PC TO ENTER PA1050
MOVEM T1,FPC
JRST GOUSR
;HERE ON DMS JSYS
DMSENT::SKIPG T1,DMSADR ;HAVE RMS NOW?
JRST GETDMS ;NO
TXNN T1,XS%EEV ;EXTENDED FORMAT VECTOR?
IFSKP.
MOVE T1,DMSUPC ;PTR TO PC
DMOVE T2,FFL ;EXTENDED FLAGS, PC
XCTU [DMOVEM T2,0(T1)] ;PASS IT TO RMS
MOVE T1,DMSU40 ;PTR TO UUO WORD
MOVE T2,KIMUEF ;MOVE UUO WORD TO RMS
UMOVEM T2,0(T1)
ELSE.
MOVE T1,DMSUPC ;OLD FORMAT VECTOR, GET PTR TO PC
MOVE T2,FPC ;CONSTRUCT OLD STYLE FLAGS, PC
HLL T2,FFL
UMOVEM T2,0(T1) ;PASS IT TO RMS
MOVE T1,DMSU40 ;PTR TO UUO WORD
MOVE T2,KIMUEF ;CONSTRUCT OLD STYLE UUO WORD
HRL T2,KIMUFL
UMOVEM T2,0(T1)
ENDIF.
MOVE T1,DMSADR ;SET RETURN PC TO ENTER RMS
MOVEM T1,FPC
JRST GOUSR
;SLOW MONITOR CALL SETUP ROUTINE
;MENTM - Invoked via JRST from APRSRV with JSYS number in CX
;MENT0 - INVOKED VIA MCENTR (JSP CX,MENT0)
;At this point,
;KIMUFL and FFL/ flags, op code, AC for MUUO; or just flags at last monitor call
;KIMUPC and FPC/ PC at context switch
MENTM:: LOAD CX,EXPCBT,JSTAB(CX) ;GET ROUTINE ADDRESS WITHOUT PCU FLAG
MENT0:: SETOM SLOWF
EXCH T1,MONFL ;SAVE T1
EXCH T2,MONPC ;SAVE T2
XSFM T1 ;GET PCS INTO T1
HLL T1,CX ;GET NEW FLAGS
MOVE T2,CX ;GET NEW FLAGS AND PC
TXZ T2,EXFLBT ;MASK OFF FLAGS
EXCH T2,KIMUPC ;SAVE NEW PC, GET OLD PC
MOVE CX,T1 ;RESTORE CX TO FLAGS AND PCS
EXCH T1,MONFL ;RESTORE T1
EXCH T2,MONPC ;SAVE OLD PC, RESTORE T2
EXCH CX,FFL ;SAVE NEW FLAGS, GET OLD FLAGS, ETC.
MOVEM CX,MONFL ;SAVE OLD FLAGS, ETC.
TLNE CX,(UMODF) ;FROM USER?
JRST MENT1 ;YES
;At this point,
; MONFL/ flags at time of entry
; MONPC/ PC at time of entry
; FFL/ new flags
; FPC/ new PC
;Here on nested JSYS in monitor
IFN SKEDSW,<
AOSGE INTDF ;CHECK STATE OF INTDF
BUG(IDFOD1)
SOS INTDF
> ;END OF IFN SKEDSW
; PUSH P,FKLOCK ;SAVE VALUE OF FORK LOCK
; PUSH P,FLKCNT ; AND NEST COUNT
;Save state information on the UPDL stack, and the current value of the stack pointer.
PUSH P,INTDF ;SAVE STATE OF INTERRUPTIBILITY
PUSH P,MPP ;SAVE POINTER TO UPDL
PUSH P,MONPC ;SAVE OLD PC
PUSH P,CX ;SAVE RETURN FLAGS
MOVEM P,MPP ;SAVE CURRENT STACK POINTER
;When running in the monitor, AC block 0 is current, 1 is previous
;Save the former "previous" AC block (block 1) in the PSB.
;Copy the former "current" AC's (block 0) to the new "previous" AC's (block 1)
AOS CX,ACBAS ;SETUP NEXT AC STACK BLOCK
CAIL CX,<EUACB>B39 ;USED ALL BLOCKS?
BUG(NOACB)
LSH CX,4 ;MAKE INTO ADDRESS
HRRZ P,CX ;SAVE COPY
XBLTUM [BLT CX,17(P)] ;PUSH PREV AC BLOCK ONTO STACK
SETZ CX,
XBLTMU [BLT CX,CX-1] ;MOVE CURR TO PREV
MOVE P,MPP ;RESTORE P
SETZM SLOWF
XCT MJRSTF ;RESUME MONITOR ROUTINE (NORMALLY XJRSTF FFL)
;Here when context was user at last monitor call
;Set current flags to include PCU, and simulate JSYS entry
MENT1: EXCH CX,FFL ;SAVE CX, GET NEW FLAGS
TLO CX,(PCU) ;MAKE SURE PCU IS ON LOCALLY
EXCH CX,FFL ;RESTORE CX, SAVE FLAGS WITH PCU
XSFM T1 ;GET CURRENT FLAGS
TXO T1,PCU ;MAKE USER PREVIOUS CONTEXT
MOVE T2,[MSEC1,,MENT11] ;WHERE TO PROCEED
XJRSTF T1 ;DO IT
MENT11: MOVE P,UPP ;TOP OF MON STACK
PUSH P,MONPC ;SAVE RETURN FOR PSI
PUSH P,CX ;SAVE FLAGS
PUSH P,MONPC
PUSH P,CX ;SAVE RETURN FOR OTHER USES
JRST MENT2 ;JOIN NORMAL USER ENTRY
;ENTRY TO TOP-LEVEL JSYS (I.E. FROM USER)
;Here when user executed a JSYS.
; CX/ JSYS number
MENTU:: SKIPE P1,@JTBLK ; Any JSYSes monitored for this fork?
JRST [ JUMPE CX,[ MCENTR ; Special case JSYS 0 (UUO trapping)
JRST UJSYS]
MOVE T1,FORKN ;Get fork number
MOVE T1,SYSFK(T1) ;Is this fork execute only?
TXNE T1,SFEXO ;...
JRST .+1 ;Yes, no trapping in this case
MOVE CX,JSTAB(CX) ;GET ROUTINE ADDRESS AND PCU FLAG
LOAD P2,JTJNO ; Yes, get JSYS number
IDIVI P2,^D36 ; Get word offset into bit table
MOVE P3,BITS(P3) ; And bit mask
ADDI P1,0(P2) ; Form address within bit table
TDNE P3,JTBAL(P1) ; Trapped?
HRRI CX,TRAPSI ; Yes, go trapped route
JRST MENTU1]
MOVE CX,JSTAB(CX) ;GET ROUTINE ADDRESS AND PCU FLAG
;Save on UPDL stack the flags and PC at the time of the MUUO
;Set up FFL and FPC to contain information for XJRSTF.
; CX/ flags and PC to go to
MENTU1: MOVE P,UPP ;SET UP STACK
PUSH P,KIMUPC
PUSH P,KIMUFL ;RETURN FOR PSI
PUSH P,KIMUPC
PUSH P,KIMUFL
JSLKB1:: ;TAG FOR JSLOOK (SNOOP PGM)
XSFM FFL ;STORE PCS INTO FFL
HLLM CX,FFL ;SET FLAGS
TXZ CX,EXFLBT ;CLEAR FLAGS
MOVEM CX,FPC ;SAVE NEW PC
;Common code for all JSYS entry from user
;Top of UPDL is set up. FFL and FPC are ready for XJRSTF.
MENT2: MOVEM P,MPP ;SET STACK FENCE
XCTU [DMOVE T1,T1] ;GET STANDARD 4 ARGS
XCTU [DMOVE T3,T3]
MOVEI CX,<UACB>B39-1 ;INIT AC STACK
MOVEM CX,ACBAS ;CURRENT AC'S MAY BE STORED HERE
SKIPE NSKED ;IS THIS PROCESS NOSKED?
CALL [ SKIPN PNSKDC ;YES, SHOULD IT BE?
RET ;NO. ALLOW INTS THEN
RETSKP] ;YES
SETOM INTDF ;INIT INTDF
SETZM CRSKED ;INIT CRITICAL REGION FLAG
SETZM SLOWF ;INIT SLOWF
XCT MJRSTF ;RESUME MONITOR ROUTINE (NORMALLY XJRSTF FFL)
IMCFLG==1B14 ;INTERNAL MONITOR CALL FLAG (X FIELD OF PC)
;New JSYS's go to ITRAP on error, MRETN on success
;Error returns from skipping JSYS's:
;MRETNE - invoked via RETERR. Stores error code from T1 into user's AC 1 and LSTERR
;EMRET0 - invoked via EMRETN. Stores error code into LSTERR but not to user
;EMRET1 - invoked via JRST. Assumes LSTERR already stored.
MRETNE::UMOVEM 1,1 ;RETURN ERROR CODE IN AC1
EMRET0::MOVEM 1,LSTERR ;SAVE ERROR CODE IN STANDARD PLACE
EMRET1::MOVE P,MPP ;RESTORE STACK PTR
DMOVE T1,-1(P) ;GET RETURN PC
EXCH T1,T2 ;IN PROPER ORDER
CALL ITRSIM ;ERJMP/ERCAL PRESENT?
JRST MRETN ;NO, NORMAL RETURN
MOVEM T3,-1(P) ;YES, SETUP RETURN
JRST MRETN
;SKMRTN IS STANDARD SKIP RETURN FROM JSYS
;Invoked via SMRETN
SKMRTN::MOVE P,MPP ;SET UP THE STACK POINTER
AOS -1(P) ;THEN INCREMENT THE RETURN ADDRESS
;Standard return from JSYS. MPP is stack pointer at time of entry.
;Make FFL and FPC point to caller's return address
MRETN:: SETOM SLOWF ;RESET FLAG
IFN SKEDSW,<
AOSGE INTDF ;CHECK STATE OF INTDF
BUG(IDFOD2)
> ;END OF IFN SKEDSW
MOVE P,MPP ;GO BACK TO LAST STACK FENCE
POP P,CX ;RETURN PC
TXZ CX,QUOTAB ;FLUSH "QUOTA" BIT
TLNN CX,(UMODF) ;RETURN TO USER?
JRST MRETN1 ;NO
;JSYS was called from user context. Set up FFL and FPC from the stack
MOVEM CX,FFL ;SET UP FLAGS
POP P,FPC ;RESTORE PC
JSLKB2:: ;TAG FOR JSLOOK (SNOOP PGM)
SKIPGE FKLOCK ;FORK LOCK FREE?
IFSKP.
HRRZ CX,FORKN ;GET US
CAME CX,FLKOWN ;ARE WE THE OWNER?
ANSKP.
BUG (INCFLK) ;YES. COMPLAIN THEN
SETOM FKLOCK ;FREE IT
SETZM FLKCNT ;AND FREE THIS TOO
ENDIF.
;ALL TRANSFERS TO USER MODE COME HERE. THE SCHEDULER RECOGNIZES
;THE PC AT GOUSR+1 AS A SINGULARITY (USER AC BLOCK BUT MONITOR PC)
;AND CORRECTS FOR IT.
GOUSR::
DATAO PAG,SETUSR ;SETUP USER AC BLOCK AS CURRENT
XCT MJRSTF ;RETURN TO USER (NORMALLY XJRSTF FFL)
;Here if returning to monitor context. Check for returning from IMCALL.
MRETN1: POP P,FPC ;RESTORE PC
MOVEM CX,FFL ;STORE FLAGS
TXZE CX,IMCFLG ;INTERNAL CALL FLAG?
JRST IMCLL1 ;YES, DIFFERENT RETURN SEQUENCE
;Copy "previous" AC's to "current". Restore "previous" AC's, which were stored
;in PSB at JSYS entry.
SETZ CX, ;MOVE PREV AC TO CURRENT
XBLTUM [BLT CX,CX-1]
HRLZ CX,ACBAS ;POP AC STACK
LSH CX,4
XBLTMU [BLT CX,17]
SOS CX,ACBAS ;DECREMENT ACBAS PTR
CAIGE CX,<UACB>B39-1
BUG(OPOPAC)
;Restore variables stored on UPDL stack at JSYS entry.
POP P,MPP ;RESTORE VARIABLES
POP P,INTDF
; POP P,FLKCNT ;RESTORE NEXT COUNT
; POP P,FKLOCK ;AND LOCK VALUE AS WELL
SETZM SLOWF
XCT MJRSTF ;RETURN TO CALLER (NORMALLY XJRSTF FFL)
;CKMMOD - CHECK FOR MONITOR MODE
CALL CKMMOD
;RETURNS +1: CALLER CAME FROM USER CONTEXT
; +2: CALLER CAME FROM MONITOR CONTEXT
;CLOBBERS NO AC'S
;THIS ROUTINE IS CALLED BY A JSYS (TTMSG, FOR EXAMPLE), WHEN IT
;REQUIRES THE CALLER TO BE PRIVILEGED EXCEPT WHEN THE CALLER IS IN
;MONITOR CONTEXT. THIS ALLOWS A NON-PRIVILEGED JSYS LIKE DTACH
;TO DO A PRIVILEGED FUNCTION LIKE TTMSG
CKMMOD::ACVAR <W1> ;GET A WORK AC
MOVE W1,MPP ;GET STACK POINTER ON ENTRY TO THE JSYS
MOVE W1,0(W1) ;GET THE FLAGS WORD FROM THE STACK
TLNE W1,(UMODF) ;IS IT USER MODE?
RET ;YES. TAKE NONSKIP RETURN
RETSKP ;NO. TAKE SKIP RETURN
ENDAV. ;END ACVAR
;INTERNAL MONITOR CALL LOGIC
; JSP CX,IMCLL0
; ADDRESS
;THIS EFFECTS A CALL TO 'ADDRESS' (PRESUMABLY A JSYS ENTRY POINT)
;JUST AS THOUGH A JSYS HAD BEEN DONE BUT WITHOUT CHANGING THE
;PREVIOUS CONTEXT. THUS PREVIOUS CONTEXT REFERENCES IN THE CALLEE
;WILL NOT REFERENCE THE CURRENT CONTEXT OF THE CALLER BUT RATHER
;THE PREVIOUS CONTEXT OF THE CALLER. USED WHERE ARGUMENTS
;(E.G. BLOCK POINTERS, STRINGS) MUST BE PASSED TO LOWER LEVEL
;ROUTINES. NOTE THAT ALL ACS ARE AUTOMATICALLY SAVED AND RESTORED,
;THE THE AC CONTEXT IS NOT CHANGED, SO ARGUMENTS MUST GENERALLY
;BE SETUP IN THE PREVIOUS CONTEXT ACS.
IMCLL0::SETOM SLOWF ;HERE VIA JSP CX,IMCLL0, INHIBIT PSI
XSFM FFL ;SAVE FLAGS
TXZ CX,EXFLBT ;MASK OFF FLAGS FROM JSP
MOVEM CX,FPC ;SAVE RETURN
ADD P,[CX,,CX] ;ALLOCATE STACK SPACE FOR ACS
MOVEI CX,-CX+1(P) ;MOVE ACS TO STACK
BLT CX,0(P)
; PUSH P,FKLOCK ;SAVE VALUE OF FKLOCK
; PUSH P,FLKCNT ;AND NEXT COUNT AS WELL
PUSH P,INTDF ;ESTABLISH USUAL STACK CONTEXT
PUSH P,MPP
AOS FPC ;BUMP RETURN PAST CALL ADDRESS WORD
PUSH P,FPC
MOVE CX,FFL ;PICK UP FLAGS
TXO CX,IMCFLG ;FLAG INTERNAL CALL
PUSH P,CX ;STACK RETURN
MOVE CX,FPC ;RESTORE PC
MOVE CX,-1(CX) ;GET CALL ADDRESS
TXC CX,<JSYS> ;SEE IF A JSYS
TXCE CX,<JSYS> ;IS IT?
IFSKP.
TLNE CX,<-<JSYS+1>>B53 ;MAYBE. STILL?
ANSKP.
HRRZS CX ;YES. GET INDEX
LDB CX,[POINT ^D23,JSTAB(CX),35] ;GET DISPATCH ADDRESS
ENDIF.
MOVEM CX,FPC ;SET UP TRANSFER TO PROPER SECTION,,OFFSET
MOVEM P,MPP ;SAVE STACK FENCE
XCTU [DMOVE T1,T1] ;GET STANDARD 4 ARGS
XCTU [DMOVE T3,T3]
SETZM SLOWF ;ENABLE PSI
XCT MJRSTF ;JUMP TO CALL ADDRESS
;HERE WHEN INTERNAL CALL FLAG DETECTED IN RETURN PC
IMCLL1: POP P,MPP ;RESTORE CONTEXT VARIABLES
POP P,INTDF
; POP P,FLKCNT ;RESTORE NEST COUNT
; POP P,FKLOCK ;AND LOCK AS WELL
MOVSI CX,-CX+1(P) ;RESTORE ACS
BLT CX,CX-1
SUB P,[CX,,CX] ;DEALLOCATE STACK SPACE
XCTU [DMOVE T1,T1] ;SETUP RETURN VALUES
XCTU [DMOVE T3,T3]
SETZM SLOWF ;ENABLE PSI
XCT MJRSTF ;RETURN
;CHECK FOR PRESENCE OF SPECIAL INSTRUCTIONS FOLLOWING JSYS WHICH
;FAILED.
;COMMON ROUTINE TO CHECK FOR ERJMP/ERCAL AND DO
;CORRECT SIMULATION.
; T1,T2/ FLAGS AND PC
;
; RETURNS +1 IF NONE FOUND OR PDL OV ON ERCAL
; RETURNS +2 WITH RETURN ADDRS IN C(T3)
;NOTE: ALL REFERENCES TO PREVIOUS CONTEXT SHOULD BE PROTECTED WITH
;ERJMPS IN CASE USER HAS BAD PROTECTIONS, NONX SECTIONS, ETC.
ITRSIM::TXNN T1,UMODF ;CALL FROM MONITOR?
SKIPA T3,0(T2) ;YES, FETCH FROM CURRENT CONTEXT
UMOVE T3,0(T2) ;NO, FETCH FROM PREVIOUS CONTEXT
ERJMP R ;RETURN IF REF FAILS
LDB T4,[POINT 13,T3,12] ;GET OPCODE AND AC
CAIN T4,<ERJMP>B58 ;AN ERJMP?
JRST ITRSX ;YES
CAIE T4,<ERCAL>B58 ;AN ERCAL?
RET ;NO
;Found an ERCAL. Fix up user's stack to simulate a call.
HRRI T2,1(T2) ;YES, GET INCREMENTED PC
UMOVE T4,P ;LOOK AT STACK PTR
TXNE T2,VSECNO ;PC IN SECTION 0?
JUMPGE T4,[MOVEI T4,1 ;NO, DIFFERENT RULES
XCTU [ADDB T4,P] ;BUMP PTR, NO OV CHECK
JRST ITRSY] ;GO FINISH UP JUMP
MOVE T4,[1,,1]
XCTU [ADDB T4,P] ;BUMP PTR
TLNN T4,377777 ;PDL OVERFLOW?
CALL [SAVET ;YES
MOVE T1,BITS+.ICPOV ;CHANNEL 9 INTERRUPT
CALL IICSLF
RET]
TXNN T2,VSECNO ;IF NOT EXT ADR,
HLL T2,T1 ;INCLUDE FLAGS WITH PC
ITRSY: UMOVEM T2,0(T4) ;STORE PC FROM JSYS
ERJMP [SAVET
MOVE T1,BITS+.ICIWR ;ILLEGAL MEMORY WRITE
CALL IICSLF ;GIVE INTERRUPT
RET] ;AND RETURN
;Get 30-bit address to go to, and return it to caller.
ITRSX: TLZ T3,777740 ;GET RID OF INSTRUCTION PART
TXO T3,<XMOVEI T3,0> ;FORM INST FETCH
XCTUU T3 ;GET PREV CONTEXT ADDRESS
ERJMP R ;GIVE UP IF E CALC FAILS
RETSKP ;GIVE GOOD RETURN
;SET PREVIOUS CONTEXT VARIABLES
;CALLED WHEN CHANGING CONTEXT IN SOME UNUSUAL WAY, E.G. POPPING UPDL
; T1/ FLAGS
; T2/ PC
; CALL SETPCV
; RETURN +1 ALWAYS, ARGS PRESERVED
SETPCV::XSFM T3 ;GET CURRENT FLAGS
TXZ T3,PCU ;CLEAR VARIABLES
TXNE T1,UMODF ;PREVIOUS CONTEXT WAS USER?
TXO T3,PCU ;YES
LOAD T4,VSECNO,T2 ;GET PREVIOUS PC SECTION
STOR T4,EXPCS,T3
POP P,T4 ;GET LOCAL RETURN
ANDX T4,EXPCBT ;BUT ONLY THE GOOD BITS
XJRSTF T3 ;RETURN AND SET PREV CONTEXT VARIABLES
;ROUTINE TO CHECK IF THERE IS AN ERJMP OR AN ERCAL AFTER A JSYS
;ACCEPTS IN T1/ RETURN FLAGS
; T2/ RETURN PC
; CALL CHKERT
;RETURNS +1: NO ERJMP OR ERCAL
; +2: THERE IS AN ERJMP OR AN ERCAL
CHKERT::TXNE T1,IMCFLG ;INTERNAL CALL?
SKIPA T1,0(T2) ;YES, FETCH FROM CURRENT CONTEXT
UMOVE T1,0(T2) ;NO, FETCH FROM PREVIOUS CONTEXT
LDB T1,[POINT 13,T1,12] ;GET OP AND AC FIELDS
CAIE T1,<ERJMP>B58 ;IS IT AN ERJMP?
CAIN T1,<ERCAL>B58 ; OR AN ERCAL?
RETSKP ;YES
RET ;NO
UPP:: IOWD NUPDL,UPDL ;MONITOR BASE STACK POINTER
UPP1: XWD -NUPDL+3,UPDL-1+3 ;STK PTR AT ENTRY TO TOP LEVEL JSYS
SUBTTL SKED JSYS
;JSYS TO DO SCHEDULER CONTROLS
;JSYS TO READ/SET SCHEDULER PARAMETERS.
SWAPCD ;START UP IS SWAPPABLE
.SKED:: MCENT ;GET INTO MONITOR
SKIPLE T1 ;VALIDATE FUNCTION
CAILE T1,MAXFUN ;VALID FUNCTION
ITERR (ARGX02) ;INVALID
SKIPL FNCTBL-1(T1) ;PRIVILEGED FUNCTION?
JRST SKED1 ;NO
MOVX T4,SC%WHL!SC%OPR ;MUST BE PRIVILEGED
TDNN T4,CAPENB ;IS IT?
ITERR (CAPX1) ;NO. BOMB THEN
SKED1: HRRZ T1,FNCTBL-1(T1) ;GET DISPATCH
JRST 0(T1) ;DO FUNCTION
FNCTBL: SKDRNB ;READ KNOB
IFIW!SKDSNB ;SET KNOB
SKDRCS ;READ CLASS SHARES
IFIW!SKDSCS ;SET CLASS SHARE
IFIW!SKDSCL ;START CLASS SCHEDULING
SKDSJC ;SET JOB CLASS
SKDRTJ ;READ THIS JOB'S UTILIZATION AND SHARE
SKDRCB ;READ CLASS SETTING FOR BATCH JOBS
IFIW!SKDSCB ;SET BATCH CLASS
IFIW!SKDRDQ ;RUN BATCH JOBS ON DREGS QUEUE
IFIW![ITERR (ARGX02)] ;UNUSED SLOT
SKDRCP ;READ CLASS PARAMETERS
MAXFUN==.-FNCTBL
;ACTION ROUTINES FOR EACH FUNCTION
;READ MICRO-CONTROL KNOB
SKDRNB: XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
CAIG T3,1 ;ROOM TO STORE VALUE?
ITERR (ARGX04) ;NO. ERROR THEN
LOAD T1,CLSKV ;GET KNOB VALUE
UMOVEM T1,.SAKNB(T2) ;RETURN TO USER
MRETNG ;AND DONE
;SET MICRO-CONTROL VALUE
SKDSNB: UMOVE T3,.SACNT(T2) ;GET COUNT
CAIG T3,1 ;HAVE VALUE TO SET?
ITERR (ARGX04) ;NO.
UMOVE T2,.SAKNB(T2) ;YES. GET IT
SKIPLE T2
CAILE T2,NSKFLV ;VALID SETTING?
ITERR (ARGX30) ;INVALID KNOB
STOR T2,CLSKV ;STORE KNOB VALUE
MOVE T2,SKFLGV-1(T2) ;GET NEW FLAGS
MOVEM T2,SCHFLG ;NEW FLAGS
MRETNG ;AND DONE
;READ CLASS SHARE
SKDRCS: XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
CAIG T3,2 ;ROOM FOR DATA?
ITERR (ARGX04) ;NO
SUBI T3,2 ;REMOVE HEADER
MOVNS T3
HRLZS T3 ;GET VALUE TO LH
HRRI T3,2(T2) ;START OF DATA
UMOVE P1,1(T2) ;GET CLASS I.D.
SKIPL P1 ;GOOD CLASS?
CAIL P1,MAXCLS ;STILL?
ITERR (ARGX25) ;NO
MOVE T4,CLSSHR(P1) ;GET CLASS' SHARE
UMOVEM T4,0(T3) ;RETURN TO CALLER
AOBJP T3,SKDONE ;WANT MORE?
MOVE T4,CLSUTL(P1) ;YES. GET UTILIZATION
UMOVEM T4,0(T3) ;RETURN TO CALLER
AOBJP T3,SKDONE ;WANT MORE?
IMULI P1,3 ;LOAD AVERAGES *3
MOVE T4,CLSRJA(P1) ;GET FIRST AVERAGE
UMOVEM T4,0(T3) ;STORE IT
AOBJP T3,SKDONE ;WANT MORE?
MOVE T4,CLSRJA+1(P1) ;GET SECOND AVERAGE
UMOVEM T4,0(T3) ;STORE IT
AOBJP T3,SKDONE ;LAST ONE TOO?
MOVE T4,CLSRJA+2(P1) ;GET THIRD AVERAGE
UMOVEM T4,0(T3) ;STORE THIRD AVERAGE
JRST SKDON0 ;AND DONE
;READ THIS JOB'S UTILIZATION AND SHARE
SKDRTJ: XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
CAIG T3,2 ;ROOM FOR ANY DATA?
ITERR (ARGX04) ;NO
SUBI T3,2 ;YES. GET NUMBER OF WORDS WANTED
MOVNS T3 ;MAKE IT NEG
HRLZS T3 ;GET IT IN THE LH
HRRI T3,.SAJCL(T2) ;FORM AOBJP POINTER
UMOVE T1,1(T2) ;GET JOB NUMBER
CAMN T1,[-1] ;THIS JOB?
MOVE T1,JOBNO ;YES. GET THE JOB NUMBER THEN
SKIPL T1 ;VALID JOB NUMBER?
CAIL T1,NJOBS ;STILL?
ITERR (ARGX08) ;NO
SKIPGE JOBRT(T1) ;LOGGED IN?
ITERR (ARGX15) ;NO
HRRZ P1,JOBCLS(T1) ;GET CLASS OF JOB
UMOVEM P1,0(T3) ;RETURN CLASS NUMBER
AOBJP T3,SKDONE ;WANT MORE?
MOVE T4,CLSSHI(P1) ;YES. GET JOB'S SHARE
UMOVEM T4,0(T3) ;AND RETURN TO USER
AOBJP T3,SKDONE ;WANT MORE?
MOVE T4,JOBUTL(T1) ;YES. GET UTILIZATION
UMOVEM T4,0(T3) ;AND RETURN IT TO THE USER
AOBJP T3,SKDONE ;WANT MORE?
MOVE T4,CLSSHR(P1) ;YES. GET CLASS SHARE
UMOVEM T4,0(T3) ;AND RETURN TO USER
AOBJP T3,SKDONE ;WANT MORE?
MOVE T4,CLSUTL(P1) ;YES. GET CLASS UTILIZATION
UMOVEM T4,0(T3) ;AND RETURN TO USER
SKDON0: ADD T3,BHC+1 ;ACCOUNT FOR LAST ONE
SKDONE: HLRES T3 ;GET REMAINING COUNT
XCTU [HRRZ T4,0(T2)] ;GET ORIGINAL COUNT
ADD T3,T4 ;COMPUTE WORDS PROCESSED
XCTU [HRLM T3,0(T2)] ;AND RETURN THIS AS WELL
MRETNG ;AND DONE
;SET CLASS SHARE FOR CLASS N
RESCD ;MUST BE RESIDENT TO AVOID PAGE FAULTS
SKDSCS: XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
CAIG T3,.SACLS+1 ;ENOUGH ARGS GIVEN?
ITERR (ARGX04)
SETOM P2 ;ASSUME WA SETTING IN ON
CAILE T3,.SAWA ;SPECIFIED SWITCH SETTING?
UMOVE P2,.SAWA(T2) ;YES. GET IT
SKIPE P2 ;ON?
SETOM P2 ;YES. SWITCH IT THEN
XCTU [DMOVE T1,.SACLS(T2)] ;GET ARGS
SKIPL T1
CAILE T1,MAXCLS-1 ;VALID CLASS?
ITERR (ARGX25)
NOSKED ;OWN MACHINE FOR A WHILE
PUSH P,CLSSHR(T1) ;SAVE OLD CLASS VALUE
MOVEM T2,CLSSHR(T1) ;SET NEW CLASS
SETZM P1 ;GET ACCUMULATOR
MOVEI T3,MAXCLS-1
SKDSC1: FAD P1,CLSSHR(T3) ;GET TOTAL SHARES ALLOCATED
SOJGE T3,SKDSC1
POP P,CLSSHR(T1) ;PUT BACK OLD VALUE
JUMPE T2,SKDS11 ;ALLOW 0 ALWAYS
CAML T2,[SHRMIN] ;AT LEAST THE MINIMUM?
CAMLE P1,[1.0] ;VALID NUMBER?
ITERR (ARGX29,<OKSKED>) ;NO
SKDS11: MOVEM P2,WA(T1) ;SET WA VECTOR VALUE
EXCH T1,T2 ;ORDER ARGS
CALL CRTSHR ;MAKE SHARE
OKSKED ;RESTORE MACHINE
MRETNG ;AND DONE
;SET CLASS FOR JOB
SKDSJC: TMNN CLSAC ;DOING CLASS BY ACCOUNT?
SKIPN CLASSF ;NO. ACCOUNTING OFF?
ITERR (SKDX1) ;YES. CAN'T DO THIS THEN
XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
CAIGE T3,3 ;ENOUGH ROOM?
ITERR (ARGX04) ;NO
XCTU [DMOVE T1,.SAJOB(T2)] ;GET DATA
CAME T1,[-1] ;THIS JOB?
CAMN T1,JOBNO ;NO. OR THIS WAY?
SKIPA T1,JOBNO ;YES. DO IT
JRST [ MOVX T3,SC%WHL!SC%OPR ;NO. MUST BE PRIVILEGED
TDNN T3,CAPENB ;IS IT?
ITERR (CAPX1) ;NO. ERROR THEN
JRST SKDSJ0] ;YES. PROCEED
SKDSJ0: SKIPL T1
CAIL T1,NJOBS ;VALID JOB
ITERR (ARGX08) ;NO
SKIPGE JOBRT(T1) ;LOGGED IN?
ITERR (ARGX15) ;NO
SKIPL T2 ;IS NEW CLASS IN RANGE
CAIL T2,MAXCLS ;??
ITERR (ARGX25) ;NOPE, USER LOSES, BAD ARGS
; MOVX T3,SC%WHL ;SEE IF THIS JOB IS WHEELED
; TDNE T3,CAPENB ;IS IT?
; JRST SKDSJ1 ;YES. SKIP GETOK THEN
GTOKM (.GOCLS,<T1,T2>) ;VERIFY REQUEST. ITRAP IF DENIED
SKDSJ1: EXCH T1,T2 ;ARRANGE ARGS PROPERLY
NOSKED
CALL CHGCLS ;DO CHANGE
OKSKED
MRETNG ;AND DONE
;START UP THE CLASS SCHEDULER
SKDSCL: XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
CAIG T3,1 ;ENOUGH WORDS?
ITERR (ARGX04) ;NO
NOSKED
UMOVE P1,.SACTL(T2) ;GET CONTROL WORD
TXNE P1,SK%STP ;STOP?
JRST [ SETZM CLASSF ;YES
CALL QBIAS ;SET UP QUANTS PROPERLY
JRST SKDSC0] ;DONE
SKIPE CLASSF ;NO. IS IT NOW ON?
ITERR (ARGX31,<OKSKED>) ;YES. CAN'T DO IT THEN
CALL QCLASS ;SET UP CLASS QUANTS
CALL STRCLS ;START UP CLASS SCHEDULER
MOVEI T1,0
TXNE P1,SK%ACT ;WANT CLASS BY ACCOUNTS?
MOVEI T1,1 ;YES.
STOR T1,CLSAC ;STORE VALUE
MOVEI T1,1
TXNE P1,SK%WDF ;WITHHOLD WINDFALL?
MOVEM T1,CLASSF ;YES. STATE THIS THEN
SKDSC0: OKSKED ;RESTORE MACHINE
MRETNG ;AND DONE
;FUNCTIONS TO SET/READ DEFAULT INFORMATION
;READ CLASS SETTING FOR BATCH JOBS
SWAPCD ;BACK TO SWAPPABLE CODE
SKDRCB: XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
CAIG T3,1 ;ROOM TO STORE VALUE?
ITERR (ARGX04) ;NO. CAN'T DO IT THEN
LOAD T1,CLSBT ;GET BATCH CLASS
SUBI T1,1 ;ONE LESS
UMOVEM T1,.SABCL(T2) ;RETURN GOOD DATA
MRETNG ;AND DONE
;SET BATCH CLASS
SKDSCB: STKVAR <CLASS>
XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
CAIG T3,1 ;HAVE AN ARG?
ITERR (ARGX04) ;NO
UMOVE T1,.SABCL(T2) ;GET SETTING
AOSL T1 ;VALID?
CAILE T1,MAXCLS+1 ;STILL?
ITERR (ARGX25) ;NO
STOR T1,CLSBT ;SAVE IT
SOS T1 ;DECREMENT CLASS
MOVEM T1,CLASS ;SAVE CLASS
MOVSI T4,-NTTPTY ;SET UP AOBJN POINTER
SKDSB1: MOVEI T2,(T4) ;GET NEXT PTY NUMBER
CALL PTYJOB ;GET A JOB NUMBER
JRST SKDSB2 ;NO JOB
MOVE T2,T3 ;GET JOB NUMBER
MOVE T1,CLASS ;GET BACK CLASS
NOSKED
SKIPE JOBDIR(T2) ;JOB STILL LOGGED IN?
CALL CHGCLS ;YES - SET ITS CLASS
OKSKED
SKDSB2: AOBJN T4,SKDSB1 ;NEXT PTY NUMBER
MRETNG ;AND DONE
;RUN ALL BATCH JOBS ON DREGS QUEUE
SKDRDQ: STKVAR <OPRIOR,NPRIOR,JOBN>
XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
SKIPE T2 ;HAVE A COUNT?
CAIG T3,1 ;BIG ENOUGH?
TROA T1,1 ;NO. SET IT THEN
UMOVE T1,.SADRG(T2) ;YES. GET IT
SKIPE T1 ;SET OR CLEAR?
MOVEI T1,1 ;SET
STOR T1,CLSBD ;DO IT
SETZ T4, ;CLEAR DREGS STATE FIRST
SKIPE T1 ;ARE WE SETTING OR CLEARING THE STATE
MOVX T4,DREGS ;SETTING, GET PRIORITY WORD
MOVEM T4,NPRIOR ;AND SAVE NEW PRIORITY
MOVSI T4,-NTTPTY ;GET AOBJN POINTER OVER PTYSTS TABLE
SKDDQ1: MOVEI T2,0(T4) ;GET PTY NUMBER
CALL PTYJOB ;GET CONTROLLING JOB NUMBER
JRST SKDDQ2 ;TERMINAL NOT ACTIVE, SHOULD NOT HAPPEN
MOVEM T3,JOBN ;SAVE JOB NUMBER
MOVE T1,JOBN ;GET JOB NUMBER INTO AC1
CALL MAPJSB ;MAP IN THE JOBS JSB
JRST SKDDQ2 ;NO JOB? FORGET IT
MOVE T2,JOBSKD(T1) ;GET OLD PRIORITY WORD.
MOVEM T2,OPRIOR ;SAVE OLD PRIORITY WORD
CALL CLRJSB ;NOW CLEAR THE MAPPING OF THE JSB
SKIPE T2,OPRIOR ;WAS A PRIORITY SET?
CAIN T2,DREGS ;EITHER 0 OR DREGS?
SKIPA ;YES, OKAY TO CHANGE
JRST SKDDQ2 ;NO, CHANGED PRIORITY, SKIP IT
MOVE T1,JOBN ;GET BACK JOB NUMBER
MOVE T2,NPRIOR ;AND GET NEW PRIORITY WORD
SJPRI ;SET IT
ERJMP SKDDQ2 ;SHOULD NOT GENERATE AN ERROR
SKDDQ2: AOBJN T4,SKDDQ1 ;LOOP OVER ALL PTYS
MRETNG ;AND DONE
;ROUTINE TO CONVERT FROM A PTY NUMBER TO CONTROLLING JOB NUMBER IF A BATCH JOB
;ACCEPTS IN T2/ PTY NUMBER
; CALL PTYJOB
;RETURNS +1: NOT A BATCH JOB OR NOT A JOB
; +2: JOB NUMBER IN T3
PTYJOB: STKVAR <TTYN>
CALL PTYTTY ;CONVERT FROM PTY NUMBER TO TTY
MOVE T1,T2 ;GET TTY NUMBER
MOVEM T2,TTYN ;SAVE TTY NUMBER
CALL CHKBCH ;SEE IF A BATCH JOB
RET ;NOPE
MOVE T2,TTYN ;GET TTY NUMBER
CALL GTCJOB ;GET CONTROLLING JOB NUMBER
RET ;NO JOB
RETSKP ;SUCCESS
;READ CLASS PARAMETERS
SKDRCP: XCTU [HRRZ T3,.SACNT(T2)] ;GET COUNT
CAIG T3,1 ;ROOM FOR DATA?
ITERR (ARGX04) ;NO
SKIPN CLASSF ;CLASS SCHEDULER ON?
JRST [ MOVX T1,SK%STP ;NO. SAY STOPPED
JRST SKDRC0] ;AND FINISH UP
SETZM T1 ;INIT VALUE
TMNE CLSAC ;DOING ACCOUNTS?
TXO T1,SK%ACT ;YES
SKIPL CLASSF ;WINDFALL WITHHELD?
TXO T1,SK%WDF ;YES.
SKDRC0: LOAD T3,CLSBD ;SEE IF BATCH ON DREGS
STOR T3,SK%DRG,T1 ;0 IF SO, 1 IF NOT
UMOVEM T1,.SACTL(T2) ;RETURN DATA
MRETNG ;AND DONE
TNXEND
END