From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Wragg Subject: LLC-* events not working on sandybridge Date: Sun, 29 Apr 2012 00:03:14 +0100 Message-ID: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mail-wg0-f44.google.com ([74.125.82.44]:63932 "EHLO mail-wg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752068Ab2D1XDS (ORCPT ); Sat, 28 Apr 2012 19:03:18 -0400 Received: by wgbdr13 with SMTP id dr13so1883965wgb.1 for ; Sat, 28 Apr 2012 16:03:17 -0700 (PDT) Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: linux-perf-users@vger.kernel.org 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