Commit 34f28ecd authored Dec 16, 2008 by Peter Zijlstra Committed by Ingo Molnar Dec 16, 2008

sched: optimize update_curr()



Impact: micro-optimization

Skip the hard work when there is none.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 03e89e45

kernel/sched_fair.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -492,6 +492,8 @@ static void update_curr(struct cfs_rq *cfs_rq)
		* overflow on 32 bits):
		*/
		delta_exec = (unsigned long)(now - curr->exec_start);
		if (!delta_exec)
		return;

		__update_curr(cfs_rq, curr, delta_exec);
		curr->exec_start = now;