From: Frederic Weisbecker <fweisbec@gmail.com>
To: Taras Glek <tglek@mozilla.com>
Cc: lkml <linux-kernel@vger.kernel.org>
Subject: Re: How to use perf to log page faults
Date: Wed, 12 May 2010 23:29:44 +0200 [thread overview]
Message-ID: <20100512212942.GI10028@nowhere> (raw)
In-Reply-To: <4BEB1B10.40200@mozilla.com>
On Wed, May 12, 2010 at 02:18:08PM -0700, Taras Glek wrote:
> On 05/12/2010 12:59 PM, Frederic Weisbecker wrote:
>> On Wed, May 12, 2010 at 12:38:30PM -0700, Taras Glek wrote:
>>
>>> Hi,
>>> From the docs it seems that perf may be useful for logging page faults.
>>> I tried
>>> perf record -g -d -f -e page-faults<mycommand>
>>> but all I got were PERF_RECORD_MMAP events.
>>>
>>> I'm using 2.6.32. Ideally I'd like to collect fault addresses and
>>> userspace stacks that caused them. Isn't this what the page-fault event
>>> is for?
>>>
>>> Taras
>>>
>>
>> Could you try with -c 1 ?
>>
>> Otherwise, does that work on the latest kernel?
>>
> this just gets me PERF_RECORD_SAMPLE events which don't seem to be
> related to page-faults(ie they show up with/without -e page-faults).
>
> I don't have the latest kernel installed here. Can you get perf
> page-fault events on your system?
Yeah, no problem on 2.6.34-rc7.
next prev parent reply other threads:[~2010-05-12 21:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-12 19:38 How to use perf to log page faults Taras Glek
2010-05-12 19:59 ` Frederic Weisbecker
2010-05-12 21:18 ` Taras Glek
2010-05-12 21:29 ` Frederic Weisbecker [this message]
2010-05-12 20:07 ` Andi Kleen
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