Performance Issues with AMD64 3000+, 1.5GB RAM, FreeBSD 5.4-RELEASE

Ariff Abdullah skywizard at
Fri Aug 26 20:38:11 GMT 2005

On Fri, 26 Aug 2005 14:17:05 -0500
Mark Kane <mark at> wrote:
> Ariff Abdullah wrote:
> > I've been following this thread, yet I still don't know what is
> > your soundcard. To tell you the truth, much of these issues relies
> > heavily on your spesific sound driver, whether it has been freed
> > from Giant or not. At least:
> Well the thing that makes me think it's not entirely related to
> sound is  because when the sound problem happens, other things
> happen as well. As  I have said, the mouse locks up and freezes at
> the precise time that the  audio starts stuttering. If I was playing
> video, it would freeze/stutter  at the same time too.
> > 1) What is your soundcard?
> Sound Blaster Augidy 2 Platinum with the emu10k1 driver compiled
> into  the kernel.
> > 2) What type of scheduler you use? (I can see that is SCHED_4BSD)
> Right, SCHED_4BSD in the GENERIC kernel.
> > 3) Is PREEMPTION enabled?
> No, not that I know of. I don't see it in GENERIC, and I haven't
> added it.

These are my suggestions:
1) enable 'options PREEMPTION'. This is a MUST.
2) use SCHED_ULE instead of SCHED_4BSD. ULE is pretty stable on me,
   but I can't guarantee (especially combining with PREEMPTION).
   It doesn't hurt to give it a try.
3) Apply these patches:


Ariff Abdullah
MyBSD (IPv6/IPv4) (IPv6/IPv4) (IPv6/IPv4)

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