Commit b5482cfa authored Nov 16, 2010 by Alex Shi Committed by Ingo Molnar Nov 18, 2010

sched: Fix volanomark performance regression



Commit fab47622 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>

parent 55f6561c

kernel/sched_fair.c

+0 −4

Original line number	Diff line number	Diff line
		@@ -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;
		}

		/*