diff options
| author |   art <art@openbsd.org> | 2009-04-20 08:48:17 +0000 |
|---|---|---|
| committer | art <art@openbsd.org> | 2009-04-20 08:48:17 +0000 |
| commit | 25a90001359e034406cc5220b299558bbb680c74 (patch) | |
| tree | 8c4e84c8cd78bcc099a51ba05c0a0a57cfbbb6f5 /sys/kern/kern_sched.c | |
| parent | restore tagged user packages to functionality (for now) (diff) | |
| download | wireguard-openbsd-25a90001359e034406cc5220b299558bbb680c74.tar.xz wireguard-openbsd-25a90001359e034406cc5220b299558bbb680c74.zip | |
Make pegging a proc work when there are idle cpus that are looking for
something to do. Walk the highest priority queue looking for a proc
to steal and skip those that are pegged.
We could consider walking the other queues in the future too, but this
should do for now.
kettenis@ guenther@ ok
Diffstat (limited to 'sys/kern/kern_sched.c')
| -rw-r--r-- | sys/kern/kern_sched.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/sys/kern/kern_sched.c b/sys/kern/kern_sched.c index 7205832b79f..f7b58cd0b43 100644 --- a/sys/kern/kern_sched.c +++ b/sys/kern/kern_sched.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kern_sched.c,v 1.11 2009/04/14 09:13:25 art Exp $ */ +/* $OpenBSD: kern_sched.c,v 1.12 2009/04/20 08:48:17 art Exp $ */ /* * Copyright (c) 2007, 2008 Artur Grabowski <art@openbsd.org> * @@ -407,19 +407,24 @@ sched_steal_proc(struct cpu_info *self) while ((ci = cpuset_first(&set)) != NULL) { struct proc *p; + int queue; int cost; cpuset_del(&set, ci); spc = &ci->ci_schedstate; - p = TAILQ_FIRST(&spc->spc_qs[ffs(spc->spc_whichqs) - 1]); - KASSERT(p); - cost = sched_proc_to_cpu_cost(self, p); + queue = ffs(spc->spc_whichqs) - 1; + TAILQ_FOREACH(p, &spc->spc_qs[queue], p_runq) { + if (p->p_flag & P_CPUPEG) + continue; - if (best == NULL || cost < bestcost) { - best = p; - bestcost = cost; + cost = sched_proc_to_cpu_cost(self, p); + + if (best == NULL || cost < bestcost) { + best = p; + bestcost = cost; + } } } if (best == NULL) |