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Make ULE process usage (%CPU) accounting usable again by keeping track

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of the last tick we incremented on.

Submitted by:	matthew.fleming/at/isilon.com, is/at/rambler-co.ru
Reviewed by:	jeff (who thinks there should be a better way in the future)
Approved by:	gnn (mentor)
MFC after:	3 weeks
This commit is contained in:
Ivan Voras 2009-11-24 19:57:41 +00:00
parent 5eaf27d8ff
commit cbc4ea28e2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=199764
1 changed files with 4 additions and 1 deletions
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5
sys/kern/sched_ule.c
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@ -103,6 +103,7 @@ struct td_sched {
u_int ts_slptime; /* Number of ticks we vol. slept */
u_int ts_runtime; /* Number of ticks we were running */
int ts_ltick; /* Last tick that we were running on */
int ts_incrtick; /* Last tick that we incremented on */
int ts_ftick; /* First tick that we were running on */
int ts_ticks; /* Tick count */
#ifdef KTR
@ -1991,6 +1992,7 @@ sched_fork_thread(struct thread *td, struct thread *child)
*/
ts2->ts_ticks = ts->ts_ticks;
ts2->ts_ltick = ts->ts_ltick;
ts2->ts_incrtick = ts->ts_incrtick;
ts2->ts_ftick = ts->ts_ftick;
child->td_user_pri = td->td_user_pri;
child->td_base_user_pri = td->td_base_user_pri;
@ -2182,11 +2184,12 @@ sched_tick(void)
* Ticks is updated asynchronously on a single cpu. Check here to
* avoid incrementing ts_ticks multiple times in a single tick.
*/
if (ts->ts_ltick == ticks)
if (ts->ts_incrtick == ticks)
return;
/* Adjust ticks for pctcpu */
ts->ts_ticks += 1 << SCHED_TICK_SHIFT;
ts->ts_ltick = ticks;
ts->ts_incrtick = ticks;
/*
* Update if we've exceeded our desired tick threshhold by over one
* second.