Subject: Re: 2.6.14-rt1: oprofile doesn't work anymore
From: Lee Revell <rlrevell@joe-job.com>
To: linux-kernel <linux-kernel@vger.kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
In-Reply-To: <1131053974.23154.9.camel@mindpipe>
References: <1131053974.23154.9.camel@mindpipe>
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Date: Thu, 03 Nov 2005 18:22:12 -0500
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On Thu, 2005-11-03 at 16:39 -0500, Lee Revell wrote:
> I am using the simple "profile" script that Andrew Morton posted several
> months ago.  But no matter what I do, all I get is:
> 
> opreport error: No sample file found: try running opcontrol --dump
> or specify a session containing sample files
> 
> (Of course I have tried running opcontrol --dump, it has absolutely no
> effect)
> 
> Examining the log files I see that it does not collect any samples.

I just tested this with oprofile both built into the kernel and as a
module, and with oprofile userspace tools 0.9.1 and from CVS.  No
change.  I have verified that /dev/oprofile is mounted.  It looks like
the profiler never sees any samples.

rlrevell@mindpipe:~$ cat /dev/oprofile/stats/cpu0/sample_received 
0

Could one of the ktimers changes have broken the timer interrupt based
profiling?

Lee 

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