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perf_event_open.2: Clarify exclude_idle 

It turns out no one is really sure what the perf_event_open.2
exclude_idle field is supposed to do, and a recent thread on the
linux-kernel list:
	[RFC] perf/core: what is exclude_idle supposed to do
did not really clarify things.

I think the following adjustment to the page clarifies things
at least a little.

Signed-off-by: Vince Weaver <vincent.weaver@maine.edu>
Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Vince Weaver 2018-06-12 12:12:31 -04:00 committed by Michael Kerrisk
parent d134c42971
commit 38b581e851
1 changed files with 3 additions and 1 deletions
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man2/perf_event_open.2
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@ -961,7 +961,9 @@ Extra support is needed for handling hypervisor measurements on most
machines.
.TP
.IR "exclude_idle"
If set, don't count when the CPU is idle.
If set, don't count when the CPU is running the idle task.
While you can currently enable this for any event type, it is ignored
for all but software events.
.TP
.IR "mmap"
The