From: Andi Kleen <andi@halobates.de>
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 22:07:03 +0200 [thread overview]
Message-ID: <8739xwvq8o.fsf@basil.nowhere.org> (raw)
In-Reply-To: <4BEB03B6.6080706@mozilla.com> (Taras Glek's message of "Wed\, 12 May 2010 12\:38\:30 -0700")
Taras Glek <tglek@mozilla.com> writes:
> 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?
Some time ago I used systemtap to do this for my pbitmaps
works. This was the old systemtap script.
-Andi
probe vm.pagefault {
if (task_execname(task_current()) == "executable" && address < 0x100000000) {
printf("%u\n", address);
}
}
--
ak@linux.intel.com -- Speaking for myself only.
prev parent reply other threads:[~2010-05-12 20:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-12 19:38 Taras Glek
2010-05-12 19:59 ` Frederic Weisbecker
2010-05-12 21:18 ` Taras Glek
2010-05-12 21:29 ` Frederic Weisbecker
2010-05-12 20:07 ` Andi Kleen [this message]
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