linux-kernel - perf event group siblings not counting in mainline

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Message-ID: <20111224125415.GA14559@mudshark.cambridge.arm.com>
Date:	Sat, 24 Dec 2011 12:54:16 +0000
From:	Will Deacon <will.deacon@....com>
To:	a.p.zijlstra@...llo.nl
Cc:	mingo@...e.hu, linux-kernel@...r.kernel.org
Subject: perf event group siblings not counting in mainline

Hi Peter,

If I try using perf with event groups on a mainline kernel, only the group
leader counts:


linaro@...hed-potato:~$ perf stat --no-scale -g -e task-clock -e cpu-clock -e cs -- ls
hwb  linux

 Performance counter stats for 'ls':

         17.545541 task-clock                #    0.634 CPUs utilized
          0.000000 cpu-clock
                 0 cs                        #    0.000 M/sec

       0.027684984 seconds time elapsed


This is fixed by b79387ef ("perf: Fix enable_on_exec for sibling events")
in -next (20111222) but I can't see this queued anywhere for 3.2 (I thought
I might see it in -rc7).

Is this going in for the final cut, or will groups just be borked until 3.3?

Cheers,

Will
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