SCHED_ULE problem: slow single processor, realtime prio vs network stack

Andrew Reilly andrew-freebsd at
Thu Aug 28 04:04:09 UTC 2008

On Thu, Aug 28, 2008 at 04:00:46AM +0400, swell.k at wrote:
> Just curious, have you tried setting dev.pcm.%d.polling to `1'?
> from the sound(4):
> 	Experimental polling mode support where
> 	the driver operates by querying the
> 	device state on each tick using a
> 	callout(9) mechanism.  Disabled by
> 	default and currently only available
>         for a few device drivers.

I'm using the 4front-tech oss driver, rather than the native
one.  I need all of the channels on my M-Audio Delta1010 sample
synchronous, and the native driver seems to be limited to
channel pairs...

> Or turning on network driver polling(4)? Or even both?
> Does it make any difference?

Haven't tried it.  Could do, I suppose.  Will try.



More information about the freebsd-multimedia mailing list