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SubjectRe: xmms (audio) skipping in 2.5 (not 2.4)
>> >> So ... is there any easy way I can diagnose this? Does anyone else
>> >> have a similar problem?
>> >
>> > Most of us who have worked with an O(1) scheduler based kernel have
>> > found this at various times. See the previous discussion with akpm
>> > about the interactivity estimator. Akpm found that decreasing the
>> > maximum timeslice duration would blunt the effect of the interactivity
>> > estimator giving preference to the "wrong" task. In 2.4.20-ck4 I avoid
>> > this problem with the "desktop tuning" of making the max
>> > timeslice==min timeslice. Try an -mm kernel with the scheduler
>> > tunables patch and try playing with the max timeslice. Most have
>> > found that <=25 will usually stop these skips. The default max
>> > timeslice of 300ms is just too long for the desktop and interactivity
>> > estimator.
>>
>> Heh, cool. I have the same patch in my tree too, fixed it without
>> rebooting even ;-) Still a *tiny* bit of skipping, but infinitely better
>> than it was.
>
> Try decreasing prio_bonus_ratio to 15 as well

Doesn't seem to make much difference, actually.
But "waggle scrollbar a bit" isn't very scientific .. ;-)
Does contest (or anything else) measure this kind of thing more precisely?

M.

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