Article: Parallelism at HotPar 2010
By: ajensen (.delete@this..), August 23, 2010 12:37 am
Room: Moderated Discussions
Anon (no@thanks.com) on 8/22/10 wrote:
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>It does however look to me like Intel is playing the same game people seem incensed
>at NVidia for doing here, unless I have missed something their base C implementation
>is running single threaded on a single core, versus 4/8 SMD units for their OpenCL version..
On page 14 they show the most interesting scenarios including handtuned C with MT and SSE, which is of course for this platform, shown to be faster than OpenCL. They don't show handtuned single thread C with SSE, which might be of some interest in academia, but in practice no one spends that much time for an implementation that will be slow vs. MT.
Also they don't show "naive-C-with-MT", but that is really an oxymoron.
So IMO they don't claim OpenCL to be the silver bullet for execution speed, but close enough to best implementation. And that much more portable and fast to write. In time I'm sure compilers will beat humans anyway for execution speed. It, is just a mater of complexity. When was the last time humans could beat computers for CPU layout?
---------------------------
>It does however look to me like Intel is playing the same game people seem incensed
>at NVidia for doing here, unless I have missed something their base C implementation
>is running single threaded on a single core, versus 4/8 SMD units for their OpenCL version..
On page 14 they show the most interesting scenarios including handtuned C with MT and SSE, which is of course for this platform, shown to be faster than OpenCL. They don't show handtuned single thread C with SSE, which might be of some interest in academia, but in practice no one spends that much time for an implementation that will be slow vs. MT.
Also they don't show "naive-C-with-MT", but that is really an oxymoron.
So IMO they don't claim OpenCL to be the silver bullet for execution speed, but close enough to best implementation. And that much more portable and fast to write. In time I'm sure compilers will beat humans anyway for execution speed. It, is just a mater of complexity. When was the last time humans could beat computers for CPU layout?
