Re: anybody else OK with current CVS *and* SMP?

[Antti Boman <antti.boman@mindcom.fi>]

Takashi Iwai wrote:
> At Tue, 05 Aug 2003 23:37:01 +0300,
> Antti Boman wrote:
> 
>>This seems like the problem I've always had with my single processor 
>>with JACK and SCHED_FIFO, with 2.4.20 kernel. I haven't tried the 
>>realtime setting for a while, though.
> 
> if the exactly same problem happens on UP, the cause would be
> different from what i thought originally.  my guess was spin dead
> locks or other SMP-specific issues, possibly around the linked pcm
> streams. 

It sounded as if it's the same problem, but naturally I don't know if 
it's caused by the same thing. I don't remember if it happened without X 
running, for example, so I have to test it without X, too. The 
frustrating part is that I really cannot debug anything, as the system 
completely locks up.

>>Maybe there's some other thing causing these? Should we gather a bit 
>>more in-depth information on our computers?
> 
> yes, this will help.
> at least, we need to investigate with the same driver/lib version
> (preferably with the same kernel and gcc).

Ok. I'll gather the information, do a few more tests, and post it on the 
list. I can also upgrade/downgrade the libs and programs if you think 
it's worth the while.

> btw, the dead-lock can be related to the lowlevel part, too.
> recently i found a bug in es1968 driver which can cause a dead-lock
> with linked streams and xrun (typically as jack does).  but in this
> case, it can happen regardless of SCHED_FIFO...

If you remember, I used to have huge problems with CMI8738 based 
integrated sound... "card", but they went away when installing newer 
ALSA drivers and libraries. Except from this SCHED_FIFO, of course.

Anyway, I'll first let you know about my current configuration, and you 
can tell me what to try.

Thanks,
-a



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