Message-ID: <1381227252.15686.9.camel@marge.simpson.net>
Subject: Re: perf: perf sched lat segfault - bisected
From: Mike Galbraith <bitbucket@online.de>
To: Stephane Eranian <eranian@google.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
        Arnaldo Carvalho de Melo <acme@redhat.com>
Date: Tue, 08 Oct 2013 12:14:12 +0200
In-Reply-To: <CABPqkBRMa7rawfvQ2Sunc2tr87s_WqT_7GYac6+x=SNZoJSueg@mail.gmail.com>
References: <1381221715.15686.3.camel@marge.simpson.net>
	 <CABPqkBRMa7rawfvQ2Sunc2tr87s_WqT_7GYac6+x=SNZoJSueg@mail.gmail.com>
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On Tue, 2013-10-08 at 11:23 +0200, Stephane Eranian wrote: 
> On Tue, Oct 8, 2013 at 10:41 AM, Mike Galbraith <bitbucket@online.de> wrote:
> > Box: Q6600
> >
> > Reproducer:
> > perf sched record -- sleep 1
> > perf sched lat (boom)
> >
> I don't understand the test case here.
> If I do this, perf sched lat complains of no trace records
> and no kernel crash. Could you provide the full cmdline?

Hm.  That was it, just like so.

marge:/usr/local/src/kernel/linux-3.x.git/tools/perf # ./perf sched record -- sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.763 MB perf.data (~33348 samples) ]
marge:/usr/local/src/kernel/linux-3.x.git/tools/perf # ./perf sched lat
Segmentation fault
marge:/usr/local/src/kernel/linux-3.x.git/tools/perf #

	-Mike

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