Commit 34f28ecd authored by Peter Zijlstra's avatar Peter Zijlstra Committed by Ingo Molnar
Browse files

sched: optimize update_curr() 



Impact: micro-optimization

Skip the hard work when there is none.

Signed-off-by: default avatarPeter Zijlstra <a.p.zijlstra@chello.nl>
Acked-by: default avatarMike Galbraith <efault@gmx.de>
Signed-off-by: default avatarIngo 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;