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| author | jeff <jeff@FreeBSD.org> | 2004-10-30 12:19:15 +0000 |
|---|---|---|
| committer | jeff <jeff@FreeBSD.org> | 2004-10-30 12:19:15 +0000 |
| commit | 917f19c0393a0e4d1ae58b3ae9c9dfedd9aaa20f (patch) | |
| tree | 9cac6ff120ac2e0487e21dbb3b2735c334e73e31 | |
| parent | f7da0c44ca54a4a7a7288fb1562aa85cc4ec9058 (diff) | |
| download | FreeBSD-src-917f19c0393a0e4d1ae58b3ae9c9dfedd9aaa20f.zip FreeBSD-src-917f19c0393a0e4d1ae58b3ae9c9dfedd9aaa20f.tar.gz | |
- When choosing a thread on the run queue, check to see if its nice is
outside of the nice threshold due to a recently awoken thread with a
lower nice value. This further reduces the amount of time a positively
niced thread gets while running in conjunction with a workload that has
many short sleeps (ie buildworld).
| -rw-r--r-- | sys/kern/sched_ule.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/sys/kern/sched_ule.c b/sys/kern/sched_ule.c index fed9c29..a494bcd 100644 --- a/sys/kern/sched_ule.c +++ b/sys/kern/sched_ule.c @@ -867,8 +867,9 @@ migrate: static struct kse * kseq_choose(struct kseq *kseq) { - struct kse *ke; struct runq *swap; + struct kse *ke; + int nice; mtx_assert(&sched_lock, MA_OWNED); swap = NULL; @@ -891,7 +892,8 @@ kseq_choose(struct kseq *kseq) * TIMESHARE kse group and its nice was too far out * of the range that receives slices. */ - if (ke->ke_slice == 0) { + nice = ke->ke_proc->p_nice + (0 - kseq->ksq_nicemin); + if (ke->ke_slice == 0 || nice > SCHED_SLICE_NTHRESH) { runq_remove(ke->ke_runq, ke); sched_slice(ke); ke->ke_runq = kseq->ksq_next; |
