Re: CONFIG_PREEMPT and server workloads

[Takashi Iwai]

At Thu, 18 Mar 2004 11:18:07 -0800,
Andrew Morton wrote:
> 
> Takashi Iwai <tiwai@xxxxxxx> wrote:
> >
> > oh, sorry, maybe i forgot to tell you that it has been already there
> >  :)
> > 
> >  	# echo 1 > /proc/asound/card0/pcm0p/xrun_debug
> > 
> >  this will show the stacktrace when a buffer overrun/underrun is
> >  detected in the irq handler.  it's not perfect, though.
> 
> heh, you just shrunk my todo list by 0.01%.
> 
> Have you had any useful reports from this feature?

not much yet.  i should write this feature in documentation now :)

also, the total buffer underrun/overrun problem doesn't happen *so*
often (except for the heavy i/o load, etc).


Takashi
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