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Commit d5ad140b authored by Nikhil Rao's avatar Nikhil Rao Committed by Ingo Molnar
Browse files

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: default avatarAlex Shi <alex.shi@intel.com>
Signed-off-by: default avatarNikhil Rao <ncrao@google.com>
Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1290022924-3548-1-git-send-email-ncrao@google.com>
Signed-off-by: default avatarIngo 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);