diff options
| author | Martin Pieuchot <mpi@cvs.openbsd.org> | 2019-05-25 18:11:11 +0000 |
|---|---|---|
| committer | Martin Pieuchot <mpi@cvs.openbsd.org> | 2019-05-25 18:11:11 +0000 |
| commit | 4fe3ad0705acbd827d55d19802904e6d401c4d6e (patch) | |
| tree | e6c4ebaae53788861df9a04371a97253698185fc /sys/kern | |
| parent | bebbfbcf65120b91c8551bbe1c2bc8d91f7d0882 (diff) | |
Do not account spinning time as running time when a thread crosses a
tick boundary of schedlock().
This reduces the contention on the SCHED_LOCK() when the current thread
is already spinning.
Prompted by deraadt@, ok visa@
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/sched_bsd.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/kern/sched_bsd.c b/sys/kern/sched_bsd.c index 00a08861b59..95c3bc23ef0 100644 --- a/sys/kern/sched_bsd.c +++ b/sys/kern/sched_bsd.c @@ -1,4 +1,4 @@ -/* $OpenBSD: sched_bsd.c,v 1.50 2019/02/26 14:24:21 visa Exp $ */ +/* $OpenBSD: sched_bsd.c,v 1.51 2019/05/25 18:11:10 mpi Exp $ */ /* $NetBSD: kern_synch.c,v 1.37 1996/04/22 01:38:37 christos Exp $ */ /*- @@ -542,7 +542,7 @@ schedclock(struct proc *p) struct schedstate_percpu *spc = &ci->ci_schedstate; int s; - if (p == spc->spc_idleproc) + if (p == spc->spc_idleproc || spc->spc_spinning) return; SCHED_LOCK(s); |