lkml.org 
[lkml]   [2005]   [Jun]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [patch] Real-Time Preemption, -RT-2.6.12-rc6-V0.7.48-00
    On Thu, 23 Jun 2005, Ingo Molnar wrote:

    > yes, very likely hardware (or system BIOS, e.g. SMM) induced.

    Running -50-17 on the Xeon/HT box, now with the ICH5 USB controller
    disabled in BIOS.

    The strangely regular ~200us idle jumps for both CPUs went away. Now I'm
    seeing one CPU at a time disappear (often completely absent) in the
    traces, with a the maximum wakeup generally hitting between 150us and
    300us. While compiling a kernel and running vlc (which would skip frames
    like mad, even with RR scheduling) I was able to get one trace of 2556us.

    There's also BUG warnings for update_out_trace(). I'm not quite sure if
    the trace behavior I'm seeing is related to this bug, but judging by the
    behavior of vlc, I wouldn't bet on it.

    Since the 2556us trace is quite large all the info is posted at:

    http://sysex.net/testing/2.6.12-RT-V0.7.50-17/xeonht/


    --ww
    -
    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: 2005-06-24 00:29    [W:0.021 / U:0.256 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site