Commit 54f44076 authored Oct 22, 2009 by Soeren Sandmann Committed by Ingo Molnar Oct 23, 2009

perf events: Don't generate events for the idle task when exclude_idle is set



Getting samples for the idle task is often not interesting, so
don't generate them when exclude_idle is set for the event in
question.

Signed-off-by: Søren Sandmann Pedersen <sandmann@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
LKML-Reference: <ye8pr8fmlq7.fsf@camel16.daimi.au.dk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 721a669b

kernel/perf_event.c

+3 −2

Original line number	Diff line number	Diff line
		@@ -3959,6 +3959,7 @@ static enum hrtimer_restart perf_swevent_hrtimer(struct hrtimer *hrtimer)
		regs = task_pt_regs(current);

		if (regs) {
		if (!(event->attr.exclude_idle && current->pid == 0))
		if (perf_event_overflow(event, 0, &data, regs))
		ret = HRTIMER_NORESTART;
		}