From mboxrd@z Thu Jan  1 00:00:00 1970
From: Namhyung Kim <namhyung.kim@lge.com>
Subject: Re: [BUG] perf top -G is broken
Date: Fri, 04 May 2012 13:09:19 +0900
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In-Reply-To: <20120502160250.GB5745@infradead.org> (Arnaldo Carvalho de Melo's
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To: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Cc: linux-perf-users@vger.kernel.org, Frederic Weisbecker <fweisbec@gmail.com>

Hi,

On Wed, 2 May 2012 13:02:50 -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, May 02, 2012 at 11:50:45AM +0900, Namhyung Kim escreveu:
>> Some guy reported me that perf top -G is broken with segment fault. I
>> can reproduce it on my system easily but the time is vary - few seconds
>> to 30 minutes. I ran it with --stdio to get a core file:
>
> Does it help to increase --mmap-pages from its default, 128, to
> something like 512 or more?
>
> Also try running with -r 90.
>
> - Arnaldo

Testing both options with current tip/perf/core gives me the same result. :(

Thanks,
Namhyung