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Message-ID: <CABPqkBRM1u=+5gKs1i02LSDMGrZDoDiDkBxVrjtsQYkVCRkFsw@mail.gmail.com> Date: Tue, 7 Feb 2012 12:27:34 +0100 From: Stephane Eranian <eranian@...gle.com> To: Eric Dumazet <eric.dumazet@...il.com> Cc: Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org, peterz@...radead.org, markus@...ppelsdorf.de, paulus@...ba.org Subject: Re: [PATCH] perf: fix assertion failure in x86_pmu_start() On Tue, Feb 7, 2012 at 12:24 PM, Eric Dumazet <eric.dumazet@...il.com> wrote: > Le mardi 07 février 2012 à 11:40 +0100, Stephane Eranian a écrit : >> 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. > > https://lkml.org/lkml/2011/3/24/552 > > 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. > > Yeah, it's an old problem (> 4years). And if I recall correctly, there is no option in the BIOS to turn it off. You'd have to talk to HP directly. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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