[asterisk-dev] nVidia Cuda
anthony at petabit.net
Sun Mar 4 15:59:05 MST 2007
the paper *Audio and the Graphics Processing Unit *(
http://www.node99.org/projects/gpuaudio/ ) may be of some usefulness to you,
it's not the most positive paper considering what you want to do but eh,
it's something... http://www.gpgpu.org/ also has a lot of resources that you
might want to check out as well.
On 3/4/07, Matthew Rubenstein <email at mattruby.com> wrote:
> Compression algorithms have generally not been ported to GPUs like
> G80. They're usually more logic and branch oriented than just brute
> force multiply-accumulates that GPUs specialize in. I also haven't seen
> any of the popular Asterisk codecs, like G.729 or GSM, ported to any
> GPU. Is there a source for codecs ported to GPUs? Or any research
> showing a good approach?
> On Sun, 2007-03-04 at 10:12 -0700, asterisk-dev-request at lists.digium.com
> > Date: Sat, 03 Mar 2007 22:05:19 -0500
> > From: Wai Wu <wkwu at calltrol.com>
> > Subject: [asterisk-dev] nVidia Cuda
> > To: asterisk-dev at lists.digium.com
> > Message-ID: <B0430B20D208514CB2AFF57E81645C3101B970 at k3-1.Calltrol.com>
> > Content-Type: text/plain; charset="iso-8859-1"
> > Hi devs,
> > Has any one looked into cuda to see if cpu intensive part of
> > asterisk(like codecs and conference) can be moved to the G80
> > processor? I found that the GF8800 cards are very inexpensive (around
> > 400 USDs per). I have ported some of our financial applications to
> > this board and found almost 10x performance improvement over the 3GHz
> > C2D host processor. I would like to do the same for asterisk.
> > To start. I have been looking into the asterisk code and have no crew
> > how it is structured except the addon applications. Here I have two
> > questions.
> > 1) Is each channel use their own thread if a codec is used?
> > 2) Which part of the asterisk code actually makes the call to the
> > necessary codec? I notice in the applications. They save and set the
> > frame format, then read from the channel. So I trace the read
> > function, but all it does is reading from a file descriptor. So I need
> > some help here.
> (C) Matthew Rubenstein
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