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    SubjectRe: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2
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    Hi Con,

    On Sun, 2007-03-11 at 14:57 +1100, Con Kolivas wrote:
    > What follows this email is a patch series for the latest version of the RSDL
    > cpu scheduler (ie v0.29). I have addressed all bugs that I am able to
    > reproduce in this version so if some people would be kind enough to test if
    > there are any hidden bugs or oops lurking, it would be nice to know in
    > anticipation of putting this back in -mm. Thanks.
    >
    > Full patch for 2.6.21-rc3-mm2:
    > http://ck.kolivas.org/patches/staircase-deadline/2.6.21-rc3-mm2-rsdl-0.29.patch

    I'm seeing a cpu distribution problem running this on my P4 box.

    Scenario:
    listening to music collection (mp3) via Amarok. Enable Amarok
    visualization gforce, and size such that X and gforce each use ~50% cpu.
    Start rip/encode of new CD with grip/lame encoder. Lame is set to use
    both cpus, at nice 5. Once the encoders start, they receive
    considerable more cpu than nice 0 X/Gforce, taking ~120% and leaving the
    remaining 80% for X/Gforce and Amarok (when it updates it's ~12k entry
    database) to squabble over.

    With 2.6.21-rc3, X/Gforce maintain their ~50% cpu (remain smooth), and
    the encoders (100%cpu bound) get whats left when Amarok isn't eating it.

    I plunked the above patch into plain 2.6.21-rc3 and retested to
    eliminate other mm tree differences, and it's repeatable. The nice 5
    cpu hogs always receive considerably more that the nice 0 sleepers.

    -Mike

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