lkml.org 
[lkml]   [2003]   [Mar]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: xmms (audio) skipping in 2.5 (not 2.4)
Per chance, do you have an NVidia graphics card and Maestro 3 or USB audio? 
If so, you're possibly getting DMA starvation. There are games you can
play with the PCI latency timers to help with this, but I cannot recall the
details; searching around for Dell Inspiron laptop audio issues might find
them. I just replaced the machine I saw this on, so I can't help anymore.

Andrew

--On Tuesday, 4 March 2003 7:15 p.m. +1100 Con Kolivas <kernel@kolivas.org>
wrote:

> On Tue, 4 Mar 2003 06:48 pm, Martin J. Bligh wrote:
>> >> >> 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?
>
> Last time I tried to do a whole swag of tunables it was showing
> differences but I was plagued by memory leaks ruining the data. I'll try
> again in the near future. Also Bill Davidsen's trivial response
> benchmark may show something too.
>
> Con
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
> Please read the FAQ at http://www.tux.org/lkml/
>
>
>


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [W:0.041 / U:0.132 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site