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Re: [Swarm-Modelling] ABMs on Graphical Processor Units
From: |
Russell Standish |
Subject: |
Re: [Swarm-Modelling] ABMs on Graphical Processor Units |
Date: |
Fri, 28 Dec 2007 18:01:38 +1100 |
User-agent: |
Mutt/1.4.2.3i |
On Thu, Dec 27, 2007 at 10:56:55PM -0700, Marcus G. Daniels wrote:
> Russell Standish wrote:
> >The blocks need to be implementable in SIMD hardware, which pretty
> >much rules out the sort of higher level functionality you're talking
> >about.
> Not really, the Cell SDK has a complete GCC target (e.g. working
> Objective C and C++) for both the front end (PPU) and back end (SPU)
> processors. As far as RPC infrastructure goes, it happens that when a C
> routine is called on a SPU for a Unix system call, that system call is
> actually a RPC back to the PPU. Unfortunately, OpenMP in GCC (gomp)
> doesn't work out of the box because there are two different instruction
> sets (one 64 bit for the PPU) and (32 bit for the SPU). But there's a
> low level library for messaging (libspe) and even a IDL stubber for
> higher level stuff:
>
> http://moss.csc.ncsu.edu/~mueller/cluster/ps3/idl.pdf
You are probably right on the Cell. I haven't studied the
architecture, nor the software environment. There is a possibility of
me getting involved in a Cell based project at CSU Bathurst - depends
on funds, that is one problem with the private sector, you often need
to do what your customers want :(
It sounds like one could do MPI on the Cell, however, which would allow
Graphcode-based applications written in EcoLab to work.
>
> Of course, additional runtime support would be needed to implement the
> idea I mentioned, but it's not like it is necessary to use only assembly
> or compiler intrinsics to get off the ground. Even NVidia GPUs now have
> a C-like language (CUDA).
>
GPUs are a different kettle of fish, as they are definitely SIMD based
(apply the same instruction to an array of pixels).
> >Other possibilities include artificial neural networks,
> >or fuzzy logic inference engines that could be used to implement agent
> >behaviour.
> >
> I was thinking some kind of optimization package would make a lot of
> sense for GPUs or the Cell. Any kind of procedure that had lots of
> candidates at once -- like a genetic program or a parallel tempering
> procedure.
That too. The problem is that optimisation usually involves callbacks
into the optimisation function, which may be a full blown ABM.
>
> Marcus
> _______________________________________________
> Modelling mailing list
> address@hidden
> http://www.swarm.org/mailman/listinfo/modelling
--
----------------------------------------------------------------------------
A/Prof Russell Standish Phone 0425 253119 (mobile)
Mathematics
UNSW SYDNEY 2052 address@hidden
Australia http://www.hpcoders.com.au
----------------------------------------------------------------------------
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, (continued)
Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Russell Standish, 2007/12/09
[Swarm-Modelling] ABMs on Graphical Processor Units, Roshan D'Souza, 2007/12/27
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Marcus G. Daniels, 2007/12/27
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Russell Standish, 2007/12/27
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Marcus G. Daniels, 2007/12/27
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Russell Standish, 2007/12/27
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Marcus G. Daniels, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units,
Russell Standish <=
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Roshan D'Souza, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Marcus G. Daniels, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Roshan D'Souza, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Marcus G. Daniels, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Russell Standish, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Marcus G. Daniels, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Russell Standish, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Marcus G. Daniels, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Steven H. Rogers, 2007/12/28
- Re: [Swarm-Modelling] ABMs on Graphical Processor Units, Marcus G. Daniels, 2007/12/31