perf stat problem - cycles event is not supported

[Chris J Arges]

When running with the latest Natty kernel 2.6.38-16.67, perf stat doesn't work.
For example:
# perf stat -e cycles ls
Error: cycles event is not supported.
Fatal: Not all events could be opened

The following relevant messages are found in dmesg:
[ 0.494517] Performance Events: PEBS fmt1+, Westmere events, Broken BIOS detected, using software events only.
[ 0.505676] [Firmware Bug]: the BIOS has corrupted hw-PMU resources (MSR 38d is 330)

This is related to this issue:
http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03265132&lang=en&cc=us&taskId=101&prodSeriesId=4132829&prodTypeId=3709945

[Chris J Arges (arges)]

This commit fixes the issue:
commit 45daae575e08bbf7405c5a3633e956fa364d1b4f
Author: Ingo Molnar <email address hidden>
Date: Fri Mar 25 10:24:23 2011 +0100

    perf, x86: Complain louder about BIOSen corrupting CPU/PMU state and continue

[Julian Wiedmann (jwiedmann)]

Chris,

Natty is EOL and the fix landed in 2.6.39, so all current releases should be fine. Can this bug be closed?

[Chris J Arges (arges)]

Closing.
Thanks