lkml.org 
[lkml]   [2011]   [Mar]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectRe: [PATCH RFC] x86: avoid atomic operation in test_and_set_bit_lock if possible
    From
    Date
    Le jeudi 24 mars 2011 à 21:54 +0100, Ingo Molnar a écrit :

    > Does it work better if you run it as root?
    >

    I confess I always am root on my dev machines :(

    > To easiest way to debug as user is to do:
    >
    > echo -1 > /proc/sys/kernel/perf_event_paranoid
    >
    > and to put this into /etc/sysctl.conf:
    >
    > kernel.perf_event_paranoid = -1
    >


    Hmm... on one machine (HP BL460c G1 ) I do have :

    [ 0.015998] Performance Events: PEBS fmt0+, Core2 events, Broken BIOS detected, using software events only.
    [ 0.015998] [Firmware Bug]: the BIOS has corrupted hw-PMU resources (MSR 186 is 43003c)


    and the other one (HB BL460c G6)

    [ 0.122760] Performance Events: PEBS fmt1+, Nehalem events, Broken BIOS detected, using software events only.
    [ 0.123047] [Firmware Bug]: the BIOS has corrupted hw-PMU resources (MSR 38d is 330)


    Hmm.. I have latest HP BIOS.

    Version: I15
    Release Date: 10/25/2010

    and

    Version: I24
    Release Date: 09/02/2010

    I am pretty sure I used "-e ..." some time ago with same BIOS.



    --
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2011-03-24 22:05    [W:0.046 / U:59.404 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site