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    SubjectRe: 2.6 vs 2.4 regression when running gnomemeeting
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    On Fri, 2003-12-19 at 21:32, William Lee Irwin III wrote:
    > On Fri, Dec 19, 2003 at 09:11:50PM +0100, Christian Meder wrote:
    > > I've got a longstanding regression in gnomemeeting usage when switching
    > > between 2.4 and 2.6 kernels.
    > > Phenomenon:
    > > Without load gnomemeeting VOIP connections are fine. As soon as some
    > > load like a kernel compile is put on the laptop the gnomemeeting audio
    > > stream is cut to pieces and gets unintelligible . On 2.4.2x I don't get
    > > even the slightest distortion in the audio stream under load. I played
    > > around with different nice levels with no success. The problem persisted
    > > during the whole 2.6.0-test series no matter whether I used -mm kernels
    > > or pristine Linus kernels. Even when nicing the kernel compile to +19
    > > the distortions start right away. I tried Nick Piggin's scheduler which
    > > fared slightly better after changing the nice level of gnomemeeting to
    > > -10 but it's still a far cry from the 2.4.2x feeling without any
    > > fiddling with nice values.
    > > Any hints where to start looking are greatly appreciated.
    >
    > Please instrument your workload with the following, and send logs of the
    > output (preferably compressed) to me and possibly others:
    >
    > top b d 5
    > vmstat 5
    > while true; do cat /proc/vmstat; sleep 5; done
    > while true; do cat /proc/meminfo; sleep 5; done
    >
    > A good way to log commands like this is:
    >
    > (command) > /home/foo.log.1 2>&1 &
    >
    > where parentheses surround the command in the actual shell input.

    Hi,

    I've attached the tarred output of a gnomemeeting run without load and
    without distortions and another tarred output of a gnomemeeting run
    while compiling a kernel with severe distortions in the audio stream.


    Christian Meder
    --
    Christian Meder, email: chris@onestepahead.de

    What's the railroad to me ?
    I never go to see
    Where it ends.
    It fills a few hollows,
    And makes banks for the swallows,
    It sets the sand a-blowing,
    And the blackberries a-growing.
    (Henry David Thoreau)




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