<br><br><div class="gmail_quote">On Fri, Jan 30, 2009 at 2:35 AM, Fernando Lopez-Lezcano <span dir="ltr"><<a href="mailto:nando@ccrma.stanford.edu">nando@ccrma.stanford.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="Ih2E3d">On Thu, 2009-01-29 at 22:24 +0300, alex stone wrote:<br>
> I've done a bit of googling, but can't seem to find or understand<br>
> information about linux (audio and vid specific, for example writing<br>
> for film) and multicore, multi processors.<br>
><br>
> Example being a Mobo that supports quadcore/ 4 cpu. (Tyan)<br>
<br>
</div>You mean one quadcore processor or 4 quad core processors?<br>
<div class="Ih2E3d"><br>
> Anyone using one of these monsters for audio/video, with linux?<br>
<br>
</div>We have one Supermicro H8QM3 with 4 quad core opteron 8356 processors<br>
(16 cores in all!). Mostly for multi-threading and sound server<br>
experimental stuff. Works fine so far but it is in the server room (very<br>
noisy! :-)<br>
<div class="Ih2E3d"><br>
> If so, what's the performance/compatibility like? Driver/module<br>
> issues, things not working, etc..<br>
<br>
</div>On this particular mobo I've had problems with newer kernels (won't boot<br>
correctly) that I have not debugged - I just keep using an older one.<br>
<br>
The performance depends on the software. Very little stuff out there is<br>
properly multithreaded and can use more than one core. AFAIK pd,<br>
supercollider, chuck, etc, etc, use only one core. CLM in its newer S7<br>
Scheme incarnation does use multiple cores and Bill has reported very<br>
good speedups in non-realtime synthesis. Faust can also generate<br>
multithreaded code that scales very well. Stuff like mpeg encoders also<br>
have parameters to enable more than one thread of execution.<br>
<font color="#888888"><br>
-- Fernando</font></blockquote><div><br><br>Fernando, thanks for the information.<br><br>I was thinking about multicore multiprocessor, and your example fits the bill.<br><br>Can i ask, how does it perform with Ardour, RG, LSampler, Jackmp, etc?<br>
<br>Are all cores recognised and used with these apps?<br><br>And which distro and version did you have a problem with?<br><br>Alex.<br></div></div><br>