Re: [PATCH] perf: fix assertion failure in x86_pmu_start()

From: Eric Dumazet
Date: Tue Feb 07 2012 - 06:24:49 EST

Le mardi 07 fÃvrier 2012 Ã 11:40 +0100, Stephane Eranian a Ãcrit :
> Eric,
> How do you deal with that:
> [ 0.019998] Performance Events: PEBS fmt0+, Core2 events, Broken
> BIOS detected, complain to your hardware vendor.
> [ 0.019998] [Firmware Bug]: the BIOS has corrupted hw-PMU resources
> (MSR 186 is 43003c)
> Your BIOS is using a counter to count cycles for power savings tricks.
> That is conflicting
> with perf_events.

This was already discussed last year.

Apparently all HP blades I have in my labs have the problem, whatever
option is chosen in BIOS.

On my machines, I set the BIOS to 'High performance', and cpus are on
highest available frequencies.

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