Messages in this thread | | | Date | Tue, 04 Mar 2003 23:00:46 +1300 | From | Andrew McGregor <> | Subject | Re: xmms (audio) skipping in 2.5 (not 2.4) |
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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/ > > >
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