linux-kernel - Re: trinity finds ftrace/perf bug. Film at 11.

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Message-ID: <20130916164526.GB17568@redhat.com>
Date:	Mon, 16 Sep 2013 12:45:26 -0400
From:	Dave Jones <davej@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: trinity finds ftrace/perf bug. Film at 11.

On Mon, Sep 16, 2013 at 12:43:49PM +0200, Peter Zijlstra wrote:
 > On Mon, Sep 16, 2013 at 12:25:35PM +0200, Ingo Molnar wrote:
 > > Also, Dave, do you run a single copy of Trinity, or multiple ones? Any 
 > > special options for Peter to reproduce your crashes?
 > 
 > Trinity seems to spawn a process for each cpu available. So I get to run
 > 24 copies -- I presume they're all seeded differently.

They are. And I can trip up that bug with just a single instance of trinity.
(I was running more processes than cpu count though, with -C32)

	Dave

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