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
next 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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