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

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Message-ID: <20130916164421.GA17568@redhat.com>
Date:	Mon, 16 Sep 2013 12:44:21 -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 Mon, Sep 16, 2013 at 11:37:19AM +0200, Peter Zijlstra wrote:
 > On Fri, Sep 13, 2013 at 10:16:38AM -0400, Dave Jones wrote:
 > > without the diff, it'll use all kinds of fds. this diff hardwires it to just use
 > > fd's from perf_event_open.  I'll hack up a command line switch to do this in a better
 > > way at some point.
 > > 
 > > 	Dave
 > > 
 > > 
 > > diff --git a/fds.c b/fds.c
 > > index cc1ca6d..f48c95e 100644
 > > --- a/fds.c
 > > +++ b/fds.c
 > > @@ -119,6 +119,8 @@ static int get_new_random_fd(void)
 > >  retry:
 > >  	i = rand() % 6;
 > >  
 > > +	i = 3;
 > > +
 > >  	if (do_specific_proto == TRUE)
 > >  		i = 1;
 > 
 > I'm just not having much luck it seems, even after actually enabling
 > list debugging (D0H).

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

	Dave

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