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From: David Wragg <david@wragg.org>
To: linux-perf-users@vger.kernel.org
Subject: LLC-* events not working on sandybridge
Date: Sun, 29 Apr 2012 00:03:14 +0100	[thread overview]
Message-ID: <sa7r4v7foi5.fsf@wragg.org> (raw)

Hi,

I've run into a problem with perf on an Intel Sandybridge machine: The
LLC-* events never seem to trigger.

For example:

$ perf stat -e LLC-load-misses ls /
[...]
                 0 LLC-load-misses

       0.001082639 seconds time elapsed

Non-LLC events work fine:

$ perf stat -e cache-misses ls /
[...]
             4,272 cache-misses

       0.002945606 seconds time elapsed

This is on a Intel i5 machine (i5-2520M), running a fully updated Fedora
16 ('perf --version': 3.3.2-6.fc16.x86_64, 'uname -r':
3.3.2-6.fc16.x86_64).

Any ideas?

David

             reply	other threads:[~2012-04-28 23:03 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-04-28 23:03 David Wragg [this message]
2012-04-30  8:43 ` LLC-* events not working on sandybridge Namhyung Kim
2012-04-30 17:50   ` David Wragg
2012-05-02  0:53     ` Namhyung Kim
2012-05-05 23:48       ` David Wragg

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