linux-kernel - Re: [BUG] segfault in perf-top -- thread refcnt

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Message-ID: <5515B9E6.5020007@gmail.com>
Date:	Fri, 27 Mar 2015 14:13:26 -0600
From:	David Ahern <dsahern@...il.com>
To:	Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
CC:	Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
	Stephane Eranian <eranian@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] segfault in perf-top -- thread refcnt

On 3/27/15 2:11 PM, Arnaldo Carvalho de Melo wrote:
> Em Fri, Mar 27, 2015 at 11:31:22AM -0600, David Ahern escreveu:
>> >Hi Arnaldo:
>> >
>> >If I leave 'perf top -z' running it eventually crashes with the backtrace in
>> >the new thread refcnt code:
> Humm, tried here with:
>
> perf top -d 1 -z
>
> I.e. as you, with the --tui, and also with --stdio, so far couldn't
> reproduce.
>

2 things:
1. let run for a long time. go about using the server. do lots of 
builds, etc. it takes time

2. use a box with a LOT of cpus (1024 in my case)

Make sure ulimit is set to get the core.

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