lkml.org 
[lkml]   [2008]   [Oct]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: APIC frequency too slow on HP dv5z
    Thomas Gleixner wrote:
    > On Thu, 2 Oct 2008, Howard Chu wrote:
    >> Thomas Gleixner wrote:
    >>> On Tue, 30 Sep 2008, Howard Chu wrote:
    >>>
    >>>> More often than not, on a warm boot I see something like this
    >>>>
    >>>> msg.new:[ 1.940031] Using local APIC timer interrupts.
    >>>> msg.new:[ 1.944031] APIC timer calibration result 466046
    >>>> msg.new:[ 1.944031] Detected 0.466 MHz APIC timer.
    >>>> msg.new:[ 1.944031] APIC frequency too slow, disabling apic timer
    >>>>
    >>>> On cold boots it may see 12.5MHz, or may not...
    >>>>
    >>>> [ 2.000584] Using local APIC timer interrupts.
    >>>> [ 2.004067] APIC timer calibration result 12500236
    >>>> [ 2.004080] Detected 12.500 MHz APIC timer.
    >>>>
    >>>> I haven't figured out yet what the pattern is behind the behavior. Has
    >>>> anyone
    >>>> else seen this kind of problem before?
    >>> Hmm, strange. Which kernel version ?
    >> I only started paying attention recently. 2.6.27-rc4 thru rc7 for sure. I'm
    >> running rc7 right now, that's what those log snippets are from.
    >
    > Ok. Can you please add apic=verbose to the kernel command line so we
    > get more detailed info about that ?

    OK. Of course since you asked for it, the problem refused to show up. It took
    about a dozen reboots before it appeared again. And then it took 3-4 reboots
    to make it go away. Full dmesg output is here:
    http://www.highlandsun.com/hyc/msg.rc7.bad.gz
    http://www.highlandsun.com/hyc/msg.rc7.ok.gz

    --
    -- Howard Chu
    CTO, Symas Corp. http://www.symas.com
    Director, Highland Sun http://highlandsun.com/hyc/
    Chief Architect, OpenLDAP http://www.openldap.org/project/


    \
     
     \ /
      Last update: 2008-10-03 00:59    [W:0.025 / U:32.476 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site