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authorAlex Shi <alex.shi@intel.com>2010-11-16 17:34:02 +0800
committerIngo Molnar <mingo@elte.hu>2010-11-18 13:11:43 +0100
commitb5482cfa1c95a188b3054fa33274806add91bbe5 (patch)
treebcd6091faa23ab203ea9f6f4262a466bf3a696a1 /kernel
parent55f6561c6941713ab5ae9180525b026dd40b7d14 (diff)
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sched: Fix volanomark performance regression
Commit fab4762 triggers excessive idle balancing, causing a ~30% loss in volanomark throughput. Remove idle balancing throttle reset. Originally-by: Alex Shi <alex.shi@intel.com> Signed-off-by: Mike Galbraith <efault@gmx.de> Acked-by: Nikhil Rao <ncrao@google.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <1289928732.5169.211.camel@maggy.simson.net> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel')
-rw-r--r--kernel/sched_fair.c4
1 files changed, 0 insertions, 4 deletions
diff --git a/kernel/sched_fair.c b/kernel/sched_fair.c
index 52ab113d8bb..ba0556dc7c0 100644
--- a/kernel/sched_fair.c
+++ b/kernel/sched_fair.c
@@ -1758,10 +1758,6 @@ static void pull_task(struct rq *src_rq, struct task_struct *p,
set_task_cpu(p, this_cpu);
activate_task(this_rq, p, 0);
check_preempt_curr(this_rq, p, 0);
-
- /* re-arm NEWIDLE balancing when moving tasks */
- src_rq->avg_idle = this_rq->avg_idle = 2*sysctl_sched_migration_cost;
- this_rq->idle_stamp = 0;
}
/*