On Sun, 2006-09-10 at 14:24 +0200, Dominique Dumont wrote:
> Takashi Iwai <[EMAIL PROTECTED]> writes:
> 
> > Then check whether XRUN occurs at next.  Make sure that you compiled
> > the driver with debug option (--with-debug=full configure option),
> > then do the following as root:
> >
> >     # echo 2 > /proc/asound/card0/pcm2p/xrun_debug
> >
> > then play the ac3 file.  You'll get stacktraces in kernel messages if
> > XRUN is detected by the sound driver.  It's not perfect but an easy
> > way.
> 
> Since alsa site is down, I've tried to get XRUN traces with the
> kernel. I've enabled SND_DEBUG and CONFIG_SND_PCM_XRUN_DEBUG.
> 
> Note that I got a few XRUN while I got a *lot* of ac3 ... err
> ... hiccups (for lack of a better word). 
> 
> Here's what I got (with your patch) with a recompiled 2.6.17 kernel:
> (I started ac3dec, then md5sum)
> 
> Sep 10 13:55:57 gandalf kernel: XRUN: pcmC0D2p
> Sep 10 13:55:57 gandalf kernel:  <f0987cdd> 
> snd_pcm_period_elapsed+0x1ef/0x27d [snd_pcm]  <f0b060ad> 
> snd_emu10k1_fx8010_interrupt+0x37/0x57 [snd_emu10k1]
> Sep 10 13:55:57 gandalf kernel:  <f0affda5> snd_emu10k1_interrupt+0x2ad/0x390 
> [snd_emu10k1]  <b0123e04> do_timer+0x3a/0x2e2

I see your kernel uses the ACPI PM timer for timing.  Is it a dual core
AMD by any chance?

If you use an SMP kernel, do you get different results with a UP kernel?

Lee


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