Commit 05ca62c6 authored Jan 21, 2011 by Paul Turner Committed by Ingo Molnar Jan 26, 2011

sched: Use rq->clock_task instead of rq->clock for correctly maintaining load averages



The delta in clock_task is a more fair attribution of how much time a tg has
been contributing load to the current cpu.

While not really important it also means we're more in sync (by magnitude)
with respect to periodic updates (since __update_curr deltas are clock_task
based).

Signed-off-by: Paul Turner <pjt@google.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <20110122044852.007092349@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent b815f196

kernel/sched_fair.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -725,7 +725,7 @@ static void update_cfs_load(struct cfs_rq *cfs_rq, int global_update)
		if (cfs_rq->tg == &root_task_group)
		return;

		now = rq_of(cfs_rq)->clock;
		now = rq_of(cfs_rq)->clock_task;
		delta = now - cfs_rq->load_stamp;

		/* truncate load history at 4 idle periods */

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