%T Beauty And The Beast: Exploiting GPUs In Haskell
%A Alex Cole, Alistair A. McEwan, Geoff Mainland
%E Peter H. Welch, Frederick R. M. Barnes, Kevin Chalmers, Jan Bækgaard Pedersen, Adam T. Sampson
%B Communicating Process Architectures 2012
%X In this paper we compare a Haskell system that exploits a
GPU back end using Obsidian against a number of other
GPU/parallel processing systems. Our examples demonstrate
two major results. Firstly they show that the Haskell
system allows the applications programmer to exploit GPUs in
a manner that eases the development of parallel code
by abstracting from the hardware. Secondly we show that the
performance results from generating the GPU code from
Haskell are acceptably comparable to expert hand written GPU
code in most cases; and permit very significant performance
benefits over single and multi\-threaded implementations
whilst maintaining ease of development. Where our results
differ from expert hand written GPU (CUDA) code we consider
the reasons for this and discuss possible developments that
may mitigate these differences. We conclude with a
discussion of a domain specific example that benefits
directly and significantly from these results.
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