Am Tue, 7 May 2013 23:11:40 +0200 schrieb Stéphane Letz <[email protected]>:
> Hi Marc, > > Just answering some of your questions, hoping Yann will then follow... > > > > > - Related to the above performance complaint: are the -cuda/-opencl options > > in > > FAUST2 related to code generation (parallelisation?), or does the FAUST > > compiler itself then make use of CUDA/OpenCL? I suspect the former, but the > > --help output isn't quite clear to me. If it does speed up compilation, > > that > > might be a reason to upgrade my GPU (my Radeon HD 4650, using the r700 > > driver, will only partially support OpenCL, see [1]). > > -cuda/-opencl was an experiment to generate CUDA and OpenCL code to be run > on GPU. It appeared that the performance we could obtain are quite poor, > since basically the audio DSP code is not (in general…) adapted to this fined > grained kind of data parallelism GPU offers. So the development is "stalled" > right now. > > So it won't help at all in your case. > > Stéphane Ah, that does sound interesting. Actually, your message somewhat prompted a conversation with a friend a few days ago about the current developments in CPUs and my understanding is that the "Larrabee" family of CPUs (and other related efforts) will have (or are at least supposed to have) a fast enough connection to their built-in GPGPU that the -cuda/-opencl options might actually be useful in the semi-near future for some DSP algorithms. -- Marc Joliet -- "People who think they know everything really annoy those of us who know we don't" - Bjarne Stroustrup
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