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Move repeated MAXSLP definition from machine/vmparam.h to sys/vmmeter.h.

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Update the outdated comments describing MAXSLP and the process
selection algorithm for swap out.

Comments wording and reviewed by:	alc
This commit is contained in:
Konstantin Belousov 2011-01-09 12:50:44 +00:00
parent da2fcff746
commit 50a57dfbec
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=217192
12 changed files with 14 additions and 90 deletions
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1
bin/ps/print.c
View File

@ -45,6 +45,7 @@ __FBSDID("$FreeBSD$");
#include <sys/mac.h>
#include <sys/user.h>
#include <sys/sysctl.h>
#include <sys/vmmeter.h>
#include <err.h>
#include <grp.h>

11
sys/amd64/include/vmparam.h
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@ -69,17 +69,6 @@
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* We provide a machine specific single page allocator through the use
* of the direct mapped segment. This uses 2MB pages for reduced

1
sys/arm/include/vmparam.h
View File

@ -146,7 +146,6 @@
#define DFLSSIZ (2*1024*1024)
#define MAXSSIZ (8*1024*1024)
#define SGROWSIZ (128*1024)
#define MAXSLP 20
#ifdef ARM_USE_SMALL_ALLOC
#define UMA_MD_SMALL_ALLOC

12
sys/i386/include/vmparam.h
View File

@ -63,18 +63,6 @@
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* The physical address space is densely populated.
*/

11
sys/ia64/include/vmparam.h
View File

@ -69,17 +69,6 @@
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* We need region 7 virtual addresses for pagetables.
*/

11
sys/mips/include/vmparam.h
View File

@ -69,17 +69,6 @@
#define SGROWSIZ (128UL*1024) /* amount to grow stack */
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* Mach derived constants
*/

11
sys/powerpc/include/vmparam.h
View File

@ -57,17 +57,6 @@
#define MAXSSIZ (64*1024*1024) /* max stack size */
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* Would like to have MAX addresses = 0, but this doesn't (currently) work
*/

11
sys/sparc64/include/vmparam.h
View File

@ -65,17 +65,6 @@
#define SGROWSIZ (128*1024) /* amount to grow stack */
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* The physical address space is sparsely populated.
*/

11
sys/sun4v/include/vmparam.h
View File

@ -65,17 +65,6 @@
#define SGROWSIZ (128*1024) /* amount to grow stack */
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* The physical address space is densely populated.
*/

6
sys/sys/vmmeter.h
View File

@ -33,6 +33,12 @@
#ifndef _SYS_VMMETER_H_
#define _SYS_VMMETER_H_
/*
* This value is used by ps(1) to change sleep state flag from 'S' to
* 'I' and by the sched process to set the alarm clock.
*/
#define MAXSLP 20
/*
* System wide statistics counters.
* Locking:

16
sys/vm/vm_glue.c
View File

@ -94,8 +94,6 @@ __FBSDID("$FreeBSD$");
#include <vm/vm_pager.h>
#include <vm/swap_pager.h>
extern int maxslp;
/*
* System initialization
*
@ -770,7 +768,7 @@ scheduler(dummy)
* Nothing to do, back to sleep.
*/
if ((p = pp) == NULL) {
tsleep(&proc0, PVM, "sched", maxslp * hz / 2);
tsleep(&proc0, PVM, "sched", MAXSLP * hz / 2);
goto loop;
}
PROC_LOCK(p);
@ -819,12 +817,12 @@ SYSCTL_INT(_vm, OID_AUTO, swap_idle_threshold2, CTLFLAG_RW,
&swap_idle_threshold2, 0, "Time before a process will be swapped out");
/*
* Swapout is driven by the pageout daemon. Very simple, we find eligible
* procs and swap out their stacks. We try to always "swap" at least one
* process in case we need the room for a swapin.
* If any procs have been sleeping/stopped for at least maxslp seconds,
* they are swapped. Else, we swap the longest-sleeping or stopped process,
* if any, otherwise the longest-resident process.
* First, if any processes have been sleeping or stopped for at least
* "swap_idle_threshold1" seconds, they are swapped out. If, however,
* no such processes exist, then the longest-sleeping or stopped
* process is swapped out. Finally, and only as a last resort, if
* there are no sleeping or stopped processes, the longest-resident
* process is swapped out.
*/
void
swapout_procs(action)

2
sys/vm/vm_meter.c
View File

@ -54,8 +54,6 @@ __FBSDID("$FreeBSD$");
struct vmmeter cnt;
int maxslp = MAXSLP;
SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
CTLFLAG_RW, &cnt.v_free_min, 0, "");
SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,