lkml.org 
[lkml]   [2008]   [Mar]   [22]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    Subject2.6.25 regression: powertop says 120K wakeups/sec
    I noticed this with 2.6.25-rc2 (if not before), and the problem
    is still there with 2.6.25-rc6-git (as of this AM).

    System is an Athlon64 single CPU laptop, and instead of reading a
    few dozen wakeups per second, it says a many tens of thousands...
    clearly wrong. In previous kernels it gave more plausible counts;
    unfortunately high because of various un-evolved desktop tools in
    this Ubuntu system (Feisty).

    Possibly more truthful, it says that the system never enters
    C1 or C2, and spends all its time in C0. Though if I look at
    /sys/devices/system/cpu/cpu0/cpuidle/state[01]/usage, that
    seems to tell a different story ... it's C0 that's never used.
    In previous kernels it reported time in both C0 and C2. ISTR
    some patch to avoid C2, which would explain part of this.

    Comments or fixes, anyone?

    - Dave



    \
     
     \ /
      Last update: 2008-03-22 21:27    [W:0.020 / U:156.508 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site