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

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Message-ID: <20130918132249.GA13402@redhat.com>
Date:	Wed, 18 Sep 2013 09:22:49 -0400
From:	Dave Jones <davej@...hat.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: trinity finds ftrace/perf bug. Film at 11.

On Wed, Sep 18, 2013 at 01:34:11PM +0200, Peter Zijlstra wrote:
 > On Mon, Sep 16, 2013 at 12:44:21PM -0400, Dave Jones wrote:
 > > 
 > > may be some other option.. Try http://www.codemonkey.org.uk/junk/haswell-config
 > > 
 > >  > What kind of hardware are you running this on?
 > > 
 > > model name	: Intel(R) Core(TM) i5-4670T CPU @ 2.30GHz
 > 
 > Humpf,.. of course I don't have a hsw system :/
 > 
 > I'll try raising the -C count to 4*nr_cpus for the next few runs.
 > 
 > OK, seems I need to edit trinity for that, someone thought 64 was a big
 > number.

heh, at one time, the walk through the list of child processes in watchdog.c was
taking so long that it considered children that hadn't been scheduled for
a while as stuck. I'm not sure that's any better right now, so you might have
to modify that code too.

	Dave

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