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    SubjectRe: Serious performance regression in Wine applications and Linux 2.6.24.*
    Date

    On Sat, 22 Mar 2008 21:47:52 -0700, "Ray Lee" <ray-lk@madrabbit.org>
    said:
    > On Sat, Mar 22, 2008 at 7:49 PM, Kai <epimetreus@fastmail.fm> wrote:
    > > Performance degrades by about 60% when I run Wine under any of the
    > > 2.6.24.* kernels. Attached are the output of lspci -vv and the two
    > > config files of each kernel.
    > >
    > > I upgraded to 2.6.24, back to 2.6.23.(not sure), then tried 2.6.24.1 and
    > > 2.6.24.3 and the issue is present in both; it's severe enough that Wine
    > > apps are virtually unusable for me with this version of the kernel; I'm
    > > having to use 2.6.23 until this somehow is resolved.
    > >
    > > I'd like some help figuring out why this performance regression exists,
    > > and what can be done to mitigate it.
    >
    > As wine has a 'wineserver' running in a separate process, it may be
    > related to scheduler changes.
    >
    > Regardless, if you have the time, please retest using he latest git
    > head (or nightly snapshot), and see if the performance regression is
    > still there, and report back. (There have been a lot of changes
    > between 2.6.24 and current git head that impact the scheduler.)
    >
    > Please ensure that the fair group scheduler is disabled in your tests
    > (just as you have in your 2.6.24 config you attached).

    As mentioned in another response, it was happening as recently as
    2.6.25-rc6-git7; I'm currently performing a git bisect between 2.6.23
    and 2.6.24, unless someone has a better idea; it seems my best option,
    as I'm not really very experienced with kernel hacking or debugging.


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