[PlanetCCRMA] another kernel patch

Alex Timmer mijn_troep@yahoo.com
Sat Jul 5 09:19:01 2003

i haven't used these patches, but after quickly glancing over the
site a few tings come to mind....

desktop responsiveness is great, but when i'm recording i want
*every* sample to arrive on my harddisk on time, and i have no
problems getting a less responsive desktop instead. 

i guess you can't have it all at the same time especially with
single-processor systems, so i personally would choose a kernel which
can keep up with my audio stream(s) at any time, at any cost (e.g.
freezing my desktop for a split second to write audio to disk)
p.s. for me the CCRMA kernel has done exactly that  =)

 --- Florin Andrei <florin@andrei.myip.org> wrote: > Anyone else
played with the Con Kolivas kernel on a multimedia
> workstation?
> http://members.optusnet.com.au/ckolivas/kernel/
> In my experience, this kernel has the best responsiveness under all
> kinds of loads. No matter what you do, the system remains
> responsive.
> This is probably a result of the O(1) batch scheduler, the VM
> improvements, the read latency and the scheduler tuning.
> (That read latency thing is awesome! Even when you do a "cat
> /dev/zero >
> /testfile" you can still read files easily; the read and the write
> operations become "decoupled" almost completely.)
> When i compare it to CK, the PlanetCCRMA kernel seems to have a
> somewhat
> poorer interactivity, especially under heavy load. Things like
> switching
> desktops or unminimizing windows are slower under the PlanetCCRMA
> kernel, when compared to the Con Kolivas kernel (or even compared
> to the
> Red Hat kernel).
> OTOH, i'm not sure how good the CK kernel is to do things like
> digital
> audio recording (a la Ardour), if you compare it to the PlanetCCRMA
> kernel. Sure, it still has the low latency patch, but i wonder what
> happens if you don't include the DRM, the ALSA RTC and the
> capabilities
> patches (which are included in the PlanetCCRMA kernel but not in
> the CK
> kernel).
> (What is this DRM thing anyway?)
> Ideally, i'd like to use a combination of the PlanetCCRMA kernel
> and the
> Con Kolivas kernel, but i'm not sure how well all those things
> would go
> together.
> Anyone can shed some light please?
> -- 
> Florin Andrei
> http://florin.myip.org/
> _______________________________________________
> PlanetCCRMA mailing list
> PlanetCCRMA@ccrma.stanford.edu
> http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma

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