I've got a few different ones: emu10k1 on a 1G P3, ymfpci on a P4, that Maestro on a couple of Dell laptops, and a gaggle of crappier P3's with ens1371's and i810_audio's.
They all work fine now, but I had a bitchin' time getting them that way. Hadn't noticed the hdparm thing, but I had that set up right from the getgo anyway. I've found with sched(O1), rmap (possibly irrelevant), preempt, lockbreak, and the IDE patch, I can whale the tar out of it. Random app loads, 5-6 OpenGL screen saver windows, kernel build + kernel rpm rebuild + XFree rebuild, keep going... I have yet to cause a single skip on either the P3 or P4 with that combination. This does argue that the long-held kernel locks are the problem. Scheduling efficiency would seem to make up for that somewhat. On Wed, 2002-03-20 at 07:03, [EMAIL PROTECTED] wrote: > > Message: 2 > Date: Tue, 19 Mar 2002 12:48:08 -0800 > From: Christian Lambert <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > cc: [EMAIL PROTECTED] > Subject: [Alsa-devel] Re: Playback stutters > > > I am also having this problem with both my ensoniq es1371 and my > audiophile 2496 with kernel 2.4.18 and alsa 0.9beta12. It seems > to be way worse in mplayer and also when playing tribes2 where it > just constanly shutters. I have an es1371 at work where I installed > the same version of alsa but there it's working fine with the game, > the difference is that I'm running kernel 2.4.8 so I'm wondering if > something broke in kernel 2.4.18 that causes this? > > I would really like to be able to get this running stable at home. > My machine config at work and home is almost identical in both > hardware and software except for the kernel version. > > Each soundcard have their own IRQ so I'm pretty sure the hardware > I have at home is ok. With OSS/free and OSS/commercial the sound is fine > so it's something between alsa and kernel 2.4.18. > > When I was listening to music in xmms, if I move windows around or > just click buttons in netcape for example it seems to shutters everytime > I do that. > > Anybody else seeing this? > > > Hey, > > > > audio playback stutters on my system. All playback programms I have tested > > have this problem (with and without artsd). I use alsa driver 0.9.0beta12. > > The soundcard is a no-name ALS4000 soundcard. My system: Linux 2.4.18, > > Debian testing, Dual Athlon, Tyan S2460. I have read that often IRQ > > problems cause those kind of problems, but I already tried to disable as > > much as possible hardware to free up interrups. I also changed the order of > > the PCI cards and I tried it with and without MP Interrupts. > > The playback stutters if e.g. I drag around windows or a programm starts > > (even if the load is very low). It doesn't stutter if I do heavy > > calcualtion (like running kfract multiple times) and the load is above 4. > > What else should I try to narrow down the problem? > > > > regards, > > Roland Schulz > > > > > Message: 7 > Date: Wed, 20 Mar 2002 15:05:03 +1100 > From: Zenaan Harkness <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Cc: [EMAIL PROTECTED] > Subject: [Alsa-devel] Re: Playback stutters > > I am getting the same with stock 2.4.18, DELL Inspiron laptop (Maestro > 3i), my test is: > > copy a cd image file from one partition to another, while trying to play > an mp3 using mpg123. > > The mp3 skips all over the place. > > I haven't applied any alsa patches yet - just been trying to set up this > laptop since I got it at work a week ago. At first I thought it was the > loop driver - I'd been loopback mounting my cd image, but that's not the > case. > > I've tried: > - low latency patch against 2.4.18 > - preempt + lockbreak patches against 2.4.18 > - preempt patch against 2.4.19-pre3-ac3 (lockbreak doesn't apply) > > all have same problem. Since I've only recently tried setting up this > laptop, I don't know whether or not an earlier kernel works or not. Does > anyone know the earliest kernel that works for them without skipping, when > copying a large file, etc? > > thanks > zen > > > --- > I am also having this problem with both my ensoniq es1371 and my > audiophile 2496 with kernel 2.4.18 and alsa 0.9beta12. It seems > to be way worse in mplayer and also when playing tribes2 where it > just constanly shutters. I have an es1371 at work where I installed > the same version of alsa but there it's working fine with the game, > the difference is that I'm running kernel 2.4.8 so I'm wondering if > something broke in kernel 2.4.18 that causes this? > > I would really like to be able to get this running stable at home. > My machine config at work and home is almost identical in both > hardware and software except for the kernel version. > > Each soundcard have their own IRQ so I'm pretty sure the hardware > I have at home is ok. With OSS/free and OSS/commercial the sound is fine > so it's something between alsa and kernel 2.4.18. > > When I was listening to music in xmms, if I move windows around or > just click buttons in netcape for example it seems to shutters everytime > I do that. > > Anybody else seeing this? > > > Hey, > > > > audio playback stutters on my system. All playback programms I have tested > > have this problem (with and without artsd). I use alsa driver 0.9.0beta12. > > The soundcard is a no-name ALS4000 soundcard. My system: Linux 2.4.18, > > Debian testing, Dual Athlon, Tyan S2460. I have read that often IRQ > > problems cause those kind of problems, but I already tried to disable as > > much as possible hardware to free up interrups. I also changed the order of > > the PCI cards and I tried it with and without MP Interrupts. > > The playback stutters if e.g. I drag around windows or a programm starts > > (even if the load is very low). It doesn't stutter if I do heavy > > calcualtion (like running kfract multiple times) and the load is above 4. > > What else should I try to narrow down the problem? > > > > regards, > > Roland Schulz > > > > > --__--__-- > > Message: 8 > Date: Wed, 20 Mar 2002 15:08:18 +1100 > From: Zenaan Harkness <[EMAIL PROTECTED]> > To: [EMAIL PROTECTED] > Cc: [EMAIL PROTECTED] > Subject: [Alsa-devel] Re: Playback stutters > > Please CC me: > > [EMAIL PROTECTED] > > ta > zen > > > On Wed, Mar 20, 2002 at 03:05:03PM +1100, Zenaan Harkness wrote: > > I am getting the same with stock 2.4.18, DELL Inspiron laptop (Maestro > > 3i), my test is: > > > --__--__-- > > Message: 9 > To: Zenaan Harkness <[EMAIL PROTECTED]> > cc: [EMAIL PROTECTED], [EMAIL PROTECTED] > Subject: Re: [Alsa-devel] Re: Playback stutters > Date: Tue, 19 Mar 2002 23:15:12 -0500 > From: Paul Davis <[EMAIL PROTECTED]> > > >I am getting the same with stock 2.4.18, DELL Inspiron laptop (Maestro > >3i), my test is: > > > >copy a cd image file from one partition to another, while trying to play > >an mp3 using mpg123. > > > >The mp3 skips all over the place. > > since you almost certainly have IDE drivers, have you configured them > correctly using hdparm? these are source of considerable scheduling > latency, in ways that AFAIK are not improved by any of the "latency > reducing" patches available. don't ask me how to configure them - i > only use SCSI drives - but a quick google search should reveal > relevant advice. > > --p > > > --__--__-- > > Message: 10 > Date: Wed, 20 Mar 2002 16:32:15 +1100 > From: Zenaan Harkness <[EMAIL PROTECTED]> > To: Paul Davis <[EMAIL PROTECTED]> > Cc: [EMAIL PROTECTED], [EMAIL PROTECTED] > Subject: Re: [Alsa-devel] Re: Playback stutters > > On Tue, Mar 19, 2002 at 11:15:12PM -0500, Paul Davis wrote: > > >I am getting the same with stock 2.4.18, DELL Inspiron laptop (Maestro > > >3i), my test is: > > > > > >copy a cd image file from one partition to another, while trying to play > > >an mp3 using mpg123. > > > > > >The mp3 skips all over the place. > > > > since you almost certainly have IDE drivers, have you configured them > > correctly using hdparm? these are source of considerable scheduling > > latency, in ways that AFAIK are not improved by any of the "latency > > reducing" patches available. don't ask me how to configure them - i > > only use SCSI drives - but a quick google search should reveal > > relevant advice. > > thanks > > hdparm improves the situation, but I still get some (minimal) skips now: > > zen8100a:~# hdparm /dev/hda > > /dev/hda: > multcount = 16 (on) > I/O support = 1 (32-bit) > unmaskirq = 1 (on) > using_dma = 1 (on) > keepsettings = 0 (off) > nowerr = 0 (off) > readonly = 0 (off) > readahead = 8 (on) > geometry = 7296/255/63, sectors = 117210240, start = 0 > busstate = 1 (on) > > > My current 'test': > - playing an mp3 > - running make clean && make bzImage > - copying a cd image between two partitions > - loading up the odd application (eg. mozilla) > > With hdparm settings I've tried: > - 2.4.18 + preempt + lockbreak > - 2.4.18 + lowlatency > - 2.4.19-pre3-ac3 + preempt > > These seem to all give the same minimal skips with above activities. > > No skips with only the kernel compile (not doing the large copy). > > ta > zen > > > --__--__-- > > Message: 11 > Date: Wed, 20 Mar 2002 16:48:38 +1100 > From: Zenaan Harkness <[EMAIL PROTECTED]> > To: Paul Davis <[EMAIL PROTECTED]> > Cc: [EMAIL PROTECTED], [EMAIL PROTECTED] > Subject: Re: [Alsa-devel] Re: Playback stutters - Correction > > On Wed, Mar 20, 2002 at 04:32:15PM +1100, Zenaan Harkness wrote: > > On Tue, Mar 19, 2002 at 11:15:12PM -0500, Paul Davis wrote: > > > >I am getting the same with stock 2.4.18, DELL Inspiron laptop (Maestro > > > >3i), my test is: > > > > > > > >copy a cd image file from one partition to another, while trying to play > > > >an mp3 using mpg123. > > > > > > > >The mp3 skips all over the place. > > > > > > since you almost certainly have IDE drivers, have you configured them > > > correctly using hdparm? these are source of considerable scheduling > > > latency, in ways that AFAIK are not improved by any of the "latency > > > reducing" patches available. don't ask me how to configure them - i > > > only use SCSI drives - but a quick google search should reveal > > > relevant advice. > > > > thanks > > > > hdparm improves the situation, but I still get some (minimal) skips now: > > > > zen8100a:~# hdparm /dev/hda > > > > /dev/hda: > > multcount = 16 (on) > > I/O support = 1 (32-bit) > > unmaskirq = 1 (on) > > using_dma = 1 (on) > > keepsettings = 0 (off) > > nowerr = 0 (off) > > readonly = 0 (off) > > readahead = 8 (on) > > geometry = 7296/255/63, sectors = 117210240, start = 0 > > busstate = 1 (on) > > > > > > My current 'test': > > - playing an mp3 > > - running make clean && make bzImage > > - copying a cd image between two partitions > > - loading up the odd application (eg. mozilla) > > > > With hdparm settings I've tried: > > - 2.4.18 + preempt + lockbreak > > - 2.4.18 + lowlatency > > - 2.4.19-pre3-ac3 + preempt > > > > These seem to all give the same minimal skips with above activities. > > > > No skips with only the kernel compile (not doing the large copy). > > CORRECTION: > Just retested with full hdparm (added -u setting) settings on > 2.4.19-pre3-ac+preempt, and no skipping with above activities. This > seems pretty good. > > I could generate skips when switching from X to text console. Could not > generate skip when cycling virtual desktops within X (at high key repeat > rate). Again this seems pretty good. > > thanks > zen > >
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