d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Make vmdaemon timeout configurable

Browse Source 
Make vmdaemon timeout configurable, so that one can adjust
how often it runs.

Here's a trick: set this to 1, then run 'limits -m 0 sh',
then run whatever you want with 'ktrace -it XXX', and observe
how the working set changes over time.

Reviewed By:	kib
Sponsored By:	EPSRC
Differential Revision:	https://reviews.freebsd.org/D22038
This commit is contained in:
Edward Tomasz Napierala 2021-10-17 13:48:50 +01:00
parent 70774c637b
commit 0f559a9f09
1 changed files with 9 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
sys/vm/vm_swapout.c
View File

@ -153,6 +153,11 @@ SYSCTL_INT(_vm, OID_AUTO, swap_idle_threshold2, CTLFLAG_RW,
&swap_idle_threshold2, 0,
"Time before a process will be swapped out");
static int vm_daemon_timeout = 0;
SYSCTL_INT(_vm, OID_AUTO, vmdaemon_timeout, CTLFLAG_RW,
&vm_daemon_timeout, 0,
"Time between vmdaemon runs");
static int vm_pageout_req_swapout; /* XXX */
static int vm_daemon_needed;
static struct mtx vm_daemon_mtx;
@ -374,17 +379,15 @@ vm_daemon(void)
int breakout, swapout_flags, tryagain, attempts;
#ifdef RACCT
uint64_t rsize, ravailable;
if (racct_enable && vm_daemon_timeout == 0)
vm_daemon_timeout = hz;
#endif
while (TRUE) {
mtx_lock(&vm_daemon_mtx);
msleep(&vm_daemon_needed, &vm_daemon_mtx, PPAUSE, "psleep",
#ifdef RACCT
racct_enable ? hz : 0
#else
0
#endif
);
vm_daemon_timeout);
swapout_flags = vm_pageout_req_swapout;
vm_pageout_req_swapout = 0;
mtx_unlock(&vm_daemon_mtx);