Networking has a lot of latency and jitter, so not so good for
realtime audio. As for manually managing pd~, I mean just manually
creating as many pd~ instances as you have cores.
.hc
On Sep 9, 2009, at 5:06 AM, fred-ordi wrote:
Sorry if this question is obvious, may be an alternate for live
audio processing with clusters: does it exist some netsend/netreceive for audio in Puredata ? I remember having using one (experimental) few years ago but was
within MaxMSP...fred
IOhannes m zmoelnig wrote:
Phil Stone wrote:
Hi Hans,
Thanks for replying. I don't quite understand what you mean by
"manually manage". As far as I know, without something like
[pd~], there's no way to divide up and assign the Pd audio process
to more than one core. Half of the cores on a quad-core are
therefore useless to Pd (accounting for the fact that the
graphical process gets its own core).the problem is, that poly-class objects are usually meant for
_many_ objects (10+; i'm only repeating here what hans has already
said). [pd~] will fork a new thread for each of it's instances. when doing multi-core processing (and this is really the only thing
pd~ is good for; e.g .it's not good if you want to have different
priorities / asynchronous processing), you usually don't want to
create more threads than you have cores. why? performance reasons! if you create e.g. 1000 threads for 1000
instances of [doodle~] on a quad-core machine, your computer will
spend more time handling context-switches and the like (that is:
the overhead for managing the threads) than doing the actual job. as a rule of thumb, the optimum number of threads is about the
number of cores you want to use. since what is sold to customers as "multi-core" processors usually
does not involve more than 4 cores, the "best" (though probably not
the most comfortable) way to assign work to the cores from within
Pd is doing it "manually" fmgasdr.# IOhannes
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