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From: Eric Dumazet <dada1@cosmosbay.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Mikael Pettersson <mikpe@it.uu.se>,
	Robert Richter <robert.richter@amd.com>,
	oprofile-list@lists.sf.net, Ingo Molnar <mingo@elte.hu>,
	Jiri Kosina <jkosina@suse.cz>, Jiri Benc <jbenc@suse.cz>,
	Vilem Marsik <vmarsik@suse.cz>,
	Pekka Enberg <penberg@cs.helsinki.fi>,
	linux-kernel@vger.kernel.org
Subject: Re: Oprofile : need to adjust PC by 16 bytes
Date: Sat, 15 Nov 2008 17:30:58 +0100	[thread overview]
Message-ID: <491EF942.1090709@cosmosbay.com> (raw)
In-Reply-To: <20081114175056.GK3810@one.firstfloor.org>

Andi Kleen a écrit :
>>> And no, blindly subtracting 16 from IP is not a fix.
>> Who mentioned a fix ? I am only giving more fuel to Intel guys so they
>> hopefully can give us a working oprofile.
> 
> You would need to implement PEBS support to avoid that problem. But it's a big
> task. perfmon2 implements it already.
> 

Thanks for the information.

Hum, so I grabbed perfmon2 git tree, installed various tools...

I am quite new to pfmon and tried :

# pfmon --system-wide
sizeof=64 44
<press ENTER to stop session>

Then started "tbench 8", and got a kernel panic after 6 seconds.


I was using oprofile like this

opcontrol --vmlinux=/path/vmlinux --start
// doing some benchmarking...
opreport -l vmlinux | head -n 40


What would be a working equivalent for perfmon2 based tools ?

Thanks



  reply	other threads:[~2008-11-15 16:31 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-13 20:57 Oprofile [still] doesn't work on 2.6.28-rc4 on certain CPU Jiri Kosina
2008-11-13 21:24 ` Ingo Molnar
2008-11-13 21:27   ` Jiri Kosina
2008-11-13 21:37     ` Ingo Molnar
2008-11-13 21:49       ` Eric Dumazet
2008-11-14 15:25         ` Oprofile : need to adjust PC by 16 bytes Eric Dumazet
2008-11-14 15:59           ` Andi Kleen
2008-11-14 16:02             ` Eric Dumazet
2008-11-14 17:01           ` Mikael Pettersson
2008-11-14 17:21             ` Eric Dumazet
2008-11-14 17:50               ` Andi Kleen
2008-11-15 16:30                 ` Eric Dumazet [this message]
2008-11-15 18:36                   ` Andi Kleen
2008-11-17 15:02                     ` stephane eranian
2008-11-17 15:16                       ` Eric Dumazet
2008-11-17 15:24                       ` Andi Kleen
2008-11-14 10:09     ` Oprofile [still] doesn't work on 2.6.28-rc4 on certain CPU Robert Richter
2008-11-14 11:12       ` Jiri Kosina
2008-11-13 21:33   ` Maynard Johnson

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