linux-kernel - Re: perf: odd event scheduling issue

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Message-ID: <20150520071138.GD26714@krava.redhat.com>
Date:	Wed, 20 May 2015 09:11:38 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Vince Weaver <vincent.weaver@...ne.edu>,
	LKML <linux-kernel@...r.kernel.org>,
	Stephane Eranian <eranian@...gle.com>,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ingo Molnar <mingo@...hat.com>,
	Paul Mackerras <paulus@...ba.org>
Subject: Re: perf: odd event scheduling issue

On Wed, May 20, 2015 at 09:00:57AM +0200, Peter Zijlstra wrote:
> On Tue, May 19, 2015 at 11:07:09PM -0400, Vince Weaver wrote:
> > Hello
> > 
> > so I'm running 4.1-rc4 on my Haswell machine and a lot of my perf_event 
> > testsuite is failing.  There seems to be weird event scheduling issues.
> > 
> > I can reproduce it with plain perf; simple event groups that should work 
> > fine can't be scheduled.
> > 
> > vince@...well:~$ perf stat -e \{cycles,instructions\} sleep 1
> > 
> 
> Hmm indeed, my ivb-ep does the same thing. Lemme go poke at that.

snb is ok

jirka
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