[PlanetCCRMA] Qs about CCRMA Kernel

Fernando Pablo Lopez-Lezcano nando@ccrma.Stanford.EDU
Wed Dec 4 15:12:01 2002

> > > I am very new to PlanetCCRMA.  I am wondering where can I find more
> > > detailed info on  the  "the optimized kernel" also called Planet
> > > CCRMA kernel matching set of ALSA sound driver. Is it a  real-time
> > > kernel ?  where can I find its source codes ?  Your reply is highly
> > > appreciated. Thanks.
> > 
> > Its sort of soft real time. Its a stock linux kernel with some patches
> > applied to ensure that the sheduler delays are as small as possible.
> > The source can be found in the kernel src RPM on the website.
> > 
> > Maximum sheduler delays are usually in the order of 1ms, but certain
> > things will cause problems.
> Has this been compared in any way to the stock RH kernel (which is quite
> heavily patched)?

The last redhat kernel I looked at had a partial low latency patch
applied (and always enabled). Its performance for low latency audio was
worse than kernels with the full low latency patch. It's in my list of
things to do to get some benchmarks to the Planet CCRMA pages. 

-- Fernando