Commit d5ad140b authored Nov 17, 2010 by Nikhil Rao Committed by Ingo Molnar Nov 18, 2010

sched: Fix idle balancing



An earlier commit reverts idle balancing throttling reset to fix a 30%
regression in volanomark throughput. We still need to reset idle_stamp
when we pull a task in newidle balance.

Reported-by: Alex Shi <alex.shi@intel.com>
Signed-off-by: Nikhil Rao <ncrao@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1290022924-3548-1-git-send-email-ncrao@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent b5482cfa

kernel/sched_fair.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -3215,9 +3215,11 @@ static void idle_balance(int this_cpu, struct rq *this_rq)
		interval = msecs_to_jiffies(sd->balance_interval);
		if (time_after(next_balance, sd->last_balance + interval))
		next_balance = sd->last_balance + interval;
		if (pulled_task)
		if (pulled_task) {
		this_rq->idle_stamp = 0;
		break;
		}
		}

		raw_spin_lock(&this_rq->lock);

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