Trailing-Edge
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PDP-10 Archives
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BB-PBDEB-BB_1990
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10,7/system/setphy.hlp
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SET PHYSICAL Command
Function
The SET PHYSICAL command sets the maximum current physical page
limit (CPPL) that your job can use, if the word LIMIT is included
in the command line. For more information about CPPL, see the
TOPS-10 Monitor Calls Manual.
By including the word GUIDELINE in the command line, the SET
PHYSICAL command is used to establish a guideline for the
page-fault handler. The page-fault handler will then use the
specified figure as a guideline in determining when a program
will go virtual.
Format
SET PHYSICAL LIMIT nP or nK
GUIDELINE nP or nK
Where: LIMIT or GUIDELINE can be used in the command line.
The default is GUIDELINE.
K can be specified within the range 1 to 256K; P can be
specified within the range 1 to 512P.
If the command SET PHYSICAL LIMIT is given with a 0
argument, the job will never go virtual.
NOTE
The monitor regards a limit as a set maximum
number. When the monitor reaches the specified
limit, it begins virtual handling. However,
the GUIDELINE argument allows the monitor to
use discretion in determining the page size.
Characteristics
Requires LOGIN.
Leaves your terminal at monitor level.
Does not destroy your core image.
Examples
1. Check your core memory assignment:
.CORE<RET>
VIRT. MEM. ASSIGNED 2P (CURRENT LIMIT: 512P MAX LIMIT: 512P)
PHYS. MEM. ASSIGNED 2P (GUIDELINE: 512P MAX LIMIT: 510P)
SWAP SPACE LEFT: 3669P
Change the physical guideline to 100 pages:
.SET PHYSICAL 100P<RET>
Show core assignment:
.CORE<RET>
VIRT. MEM. ASSIGNED 2P (CURRENT LIMIT: 512P MAX LIMIT: 512P)
PHYS. MEM. ASSIGNED 2P (GUIDELINE: 100P MAX LIMIT:510P)
SWAP SPACE LEFT: 3671P
2. Show core memory assignment:
.CORE<RET>
VIRT. MEM. ASSIGNED 2P (CURRENT LIMIT: 512P MAX LIMIT: 512P)
PHYS. MEM. ASSIGNED 2P (GUIDELINE: 512P MAX LIMIT: 510P)
SWAP SPACE LEFT: 3484P
Set your physical limit to 100 pages:
.SET PHYSICAL LIMIT 100P<RET>
Show your memory assignment:
.CORE<RET>
VIRT. MEM. ASSIGNED 2P (CURRENT LIMIT: 512P MAX LIMIT: 512P)
PHYS. MEM. ASSIGNED 2P (CURRENT LIMIT: 100P MAX LIMIT: 510P)
SWAP SPACE LEFT: 3484P