Re: [LAD] FLTK vs GTKmm

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To: Steve Harris <steve@...>
Cc: The Linux Audio Developers' Mailing List <linux-audio-dev@...>
Date: Tuesday, August 11, 2009 - 2:23 pm

On Tue, 2009-08-11 at 14:10 +0100, Steve Harris wrote:

No, youd have to do your "stiching" ..

> Going really hightech, with access to the source you could compile the

.. at compile-time to get wildly diferent thing running simultaniosly on
each processor. At least the code must be present and then you could do
the final choice at kernel launch sending some parameter to the GPU to
ponder on:

switch(someArgument[blockID]) // we know where we are
{
case STRIP: ...; // do the channel strip thingie
case MOOG: ...; // do classic synth
case REVERB ...
case FAIRLIGHT: ...
case ...

Well, almost that simple at least. There is still the 192 thread rule
saying that you need at least 192 threads on each processor to fully
hide pipeline latencies. Each "warp" - which is a group of 32 threads -
can still take diferent codepaths though, as long as the programmer
takes care that all paths will evt arrive at any synchronisation barrier
issued by some other path. You'll get hung otherwise.

Furthermore, all processor configurations will be the same. If one
processor is configured for two blocks each having 128 threads, then
that is how the world looks like for all codepaths on all processors.

Still with me? In that case you are invited to do something wonderful
for one (or more) multiprocessors, each having 256 threads divided
between two blocks (128 threads per block) that will not use more than
the available 16K registers defined by Compute Model 1.2 so that both
blocks will run concurrently, hiding latencies as well as sync barriers.

Figuring out where to read and write shared in/out in an organized way
would in theory be the first minor obstacle, but nobody will notice
before the individual parts of the project is eventually stiched
together. Also, nobody knows yet what kind of processing will be
available either or why anybody would like to read any other data, so ..

Just to get going, say the kernel will be called every 128 samples at a
samplerate suitable for the processor at hand. Assume something like a
rate of 96K @1.2GHz

> Sure, but it doesn't sound like it's as useful as a GP CPU.

Bah!

/jma

> - Steve

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Messages in current thread:
[LAD] FLTK vs GTKmm, Christian, (Mon Aug 10, 7:41 am)
[LAD] GTK+ vs QT for new Open Source Project., Ken Dawber, (Thu Aug 13, 6:35 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., Luis Garrido, (Thu Aug 13, 9:06 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., Paul Davis, (Thu Aug 13, 10:34 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., Pedro Lopez-Cabanillas, (Fri Aug 14, 10:51 am)
Re: [LAD] GTK+ vs QT for new Open Source Project., Gabriel M. Beddingfield, (Fri Aug 14, 4:30 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., David Robillard, (Fri Aug 14, 4:01 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., Harry Van Haaren, (Fri Aug 14, 4:21 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., Ray Rashif, (Fri Aug 14, 1:37 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., Chris Cannam, (Fri Aug 14, 1:41 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., Julien Claassen, (Thu Aug 13, 7:25 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., David Robillard, (Thu Aug 13, 7:29 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., Chris Cannam, (Fri Aug 14, 4:14 pm)
Re: [LAD] GTK+ vs QT for new Open Source Project., Paul Davis, (Thu Aug 13, 7:20 pm)
Re: [LAD] FLTK vs GTKmm, Thorsten Wilms, (Mon Aug 10, 9:52 am)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 11:29 am)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 11:33 am)
Re: [LAD] FLTK vs GTKmm, Raymond Martin, (Mon Aug 10, 10:44 am)
Re: [LAD] FLTK vs GTKmm, Christian, (Mon Aug 10, 11:13 am)
Re: [LAD] FLTK vs GTKmm, Raymond Martin, (Mon Aug 10, 12:04 pm)
Re: [LAD] FLTK vs GTKmm, Luis Garrido, (Mon Aug 10, 1:08 pm)
Re: [LAD] FLTK vs GTKmm, Pedro Lopez-Cabanillas, (Tue Aug 11, 9:21 am)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Tue Aug 11, 5:30 pm)
Re: [LAD] FLTK vs GTKmm, Christian, (Mon Aug 10, 10:09 am)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Mon Aug 10, 4:10 pm)
Re: [LAD] FLTK vs GTKmm, Ralf Mardorf, (Tue Aug 11, 4:45 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 4:32 pm)
Re: [LAD] FLTK vs GTKmm, Ralf Mardorf, (Tue Aug 11, 4:53 pm)
Re: [LAD] FLTK vs GTKmm, Vincent Torri, (Tue Aug 11, 5:06 pm)
Re: [LAD] FLTK vs GTKmm, Ralf Mardorf, (Tue Aug 11, 5:47 pm)
Re: [LAD] FLTK vs GTKmm, Vincent Torri, (Tue Aug 11, 6:00 pm)
Re: [LAD] FLTK vs GTKmm, Ralf Mardorf, (Tue Aug 11, 6:36 pm)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Mon Aug 10, 5:57 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 6:06 pm)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Mon Aug 10, 6:49 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 7:10 pm)
Re: [LAD] FLTK vs GTKmm, Patrick Shirkey, (Mon Aug 10, 6:16 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 6:43 pm)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Mon Aug 10, 7:00 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 7:17 pm)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Mon Aug 10, 7:22 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 7:26 pm)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Mon Aug 10, 7:41 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 8:05 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 9:10 pm)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Mon Aug 10, 9:14 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 9:36 pm)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Mon Aug 10, 9:40 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Mon Aug 10, 10:45 pm)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Tue Aug 11, 1:44 am)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Tue Aug 11, 6:17 am)
Re: [LAD] FLTK vs GTKmm, Steve Harris, (Tue Aug 11, 6:45 am)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Tue Aug 11, 7:06 am)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Tue Aug 11, 5:32 pm)
Re: [LAD] FLTK vs GTKmm, Steve Harris, (Tue Aug 11, 10:26 am)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Tue Aug 11, 11:55 am)
Re: [LAD] FLTK vs GTKmm, Steve Harris, (Tue Aug 11, 1:10 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Tue Aug 11, 2:23 pm)
Re: [LAD] FLTK vs GTKmm, Adrian Knoth, (Tue Aug 11, 12:44 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Fri Nov 6, 8:10 pm)
Re: [LAD] FLTK vs GTKmm, Adrian Knoth, (Sun Nov 8, 10:01 am)
[LAD] audio@CUDA, Jens M Andreasen, (Sun Nov 8, 9:50 pm)
Re: [LAD] FLTK vs GTKmm, Loki Davison, (Tue Aug 11, 2:33 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Tue Aug 11, 4:54 pm)
Re: [LAD] FLTK vs GTKmm, Fons Adriaensen, (Tue Aug 11, 5:55 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Tue Aug 11, 6:57 pm)
Re: [LAD] FLTK vs GTKmm, Fons Adriaensen, (Tue Aug 11, 8:15 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Wed Aug 12, 8:00 am)
Re: [LAD] FLTK vs GTKmm, Fons Adriaensen, (Wed Aug 12, 10:11 am)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Wed Aug 12, 6:52 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Tue Aug 11, 4:01 pm)
Re: [LAD] FLTK vs GTKmm, Jens M Andreasen, (Tue Aug 11, 12:33 pm)
Re: [LAD] FLTK vs GTKmm, David Robillard, (Mon Aug 10, 9:01 pm)
Re: [LAD] FLTK vs GTKmm, Patrick Shirkey, (Mon Aug 10, 6:47 pm)
Re: [LAD] FLTK vs GTKmm, Ralf Mardorf, (Tue Aug 11, 5:04 pm)
Re: [LAD] FLTK vs GTKmm, Paul Davis, (Mon Aug 10, 10:15 am)
Re: [LAD] FLTK vs GTKmm, Christian, (Mon Aug 10, 10:27 am)