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- Add sysctls to show number of stats scans.

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MFC after:	2 weeks
This commit is contained in:
Andrey Zonov 2013-01-28 12:20:20 +00:00
parent 4a36532940
commit 536368691a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=246030
1 changed files with 12 additions and 2 deletions
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14
sys/vm/vm_pageout.c
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@ -152,7 +152,9 @@ MTX_SYSINIT(vm_daemon, &vm_daemon_mtx, "vm daemon", MTX_DEF);
#endif
static int vm_max_launder = 32;
static int vm_pageout_stats_max;
static int vm_pageout_stats;
static int vm_pageout_stats_interval;
static int vm_pageout_full_stats;
static int vm_pageout_full_stats_interval;
static int vm_pageout_algorithm;
static int defer_swap_pageouts;
@ -175,12 +177,18 @@ SYSCTL_INT(_vm, OID_AUTO, max_launder,
SYSCTL_INT(_vm, OID_AUTO, pageout_stats_max,
CTLFLAG_RW, &vm_pageout_stats_max, 0, "Max pageout stats scan length");
SYSCTL_INT(_vm, OID_AUTO, pageout_full_stats_interval,
CTLFLAG_RW, &vm_pageout_full_stats_interval, 0, "Interval for full stats scan");
SYSCTL_INT(_vm, OID_AUTO, pageout_stats,
CTLFLAG_RD, &vm_pageout_stats, 0, "Number of partial stats scans");
SYSCTL_INT(_vm, OID_AUTO, pageout_stats_interval,
CTLFLAG_RW, &vm_pageout_stats_interval, 0, "Interval for partial stats scan");
SYSCTL_INT(_vm, OID_AUTO, pageout_full_stats,
CTLFLAG_RD, &vm_pageout_full_stats, 0, "Number of full stats scans");
SYSCTL_INT(_vm, OID_AUTO, pageout_full_stats_interval,
CTLFLAG_RW, &vm_pageout_full_stats_interval, 0, "Interval for full stats scan");
#if defined(NO_SWAPPING)
SYSCTL_INT(_vm, VM_SWAPPING_ENABLED, swap_enabled,
CTLFLAG_RD, &vm_swap_enabled, 0, "Enable entire process swapout");
@ -1532,11 +1540,13 @@ vm_pageout_page_stats(void)
pcount = cnt.v_active_count;
fullintervalcount += vm_pageout_stats_interval;
if (fullintervalcount < vm_pageout_full_stats_interval) {
vm_pageout_stats++;
tpcount = (int64_t)vm_pageout_stats_max * cnt.v_active_count /
cnt.v_page_count;
if (pcount > tpcount)
pcount = tpcount;
} else {
vm_pageout_full_stats++;
fullintervalcount = 0;
}