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Code Issues Releases Activity

- When migrating a kse from one kseq to the next actually insert it onto

Browse Source 
the second kseq's run queue so that it is referenced by the kse when
   it is switched out.
 - Spell ksq_rslices properly.

Reported by:	Ian Freislich <ianf@za.uu.net>
This commit is contained in:
Jeff Roberson 2003-04-11 18:37:34 +00:00
parent cc59b11e0f
commit c36ccfa22b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=113370
1 changed files with 19 additions and 22 deletions
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41
sys/kern/sched_ule.c
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@ -924,7 +924,7 @@ sched_clock(struct kse *ke)
*/
ke->ke_slice--;
#ifdef SMP
kseq->ksq_rslice--;
kseq->ksq_rslices--;
#endif
if (ke->ke_slice > 0)
@ -991,16 +991,11 @@ sched_choose(void)
{
struct kseq *kseq;
struct kse *ke;
#ifdef SMP
int steal;
steal = 0;
#endif
kseq = KSEQ_SELF();
#ifdef SMP
retry:
#endif
kseq = KSEQ_SELF();
ke = kseq_choose(kseq);
if (ke) {
runq_remove(ke->ke_runq, ke);
@ -1011,28 +1006,30 @@ sched_choose(void)
ke, ke->ke_runq, ke->ke_slice,
ke->ke_thread->td_priority);
}
#ifdef SMP
/*
* If we've stolen this thread we need to kill the pointer
* to the run queue and reset the cpu id.
*/
if (steal) {
kseq_rem(kseq, ke);
ke->ke_cpu = PCPU_GET(cpuid);
kseq_add(KSEQ_SELF(), ke);
}
#endif
return (ke);
}
#ifdef SMP
if (ke == NULL && smp_started) {
if (smp_started) {
/*
* Find the cpu with the highest load and steal one proc.
*/
steal = 1;
if ((kseq = kseq_load_highest()) != NULL)
goto retry;
if ((kseq = kseq_load_highest()) == NULL)
return (NULL);
/*
* Remove this kse from this kseq and runq and then requeue
* on the current processor. Then we will dequeue it
* normally above.
*/
ke = kseq_choose(kseq);
runq_remove(ke->ke_runq, ke);
ke->ke_state = KES_THREAD;
kseq_rem(kseq, ke);
ke->ke_cpu = PCPU_GET(cpuid);
sched_add(ke);
goto retry;
}
#endif