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Re: giga rays on intel phi

Posted: Sat Sep 14, 2013 5:39 pm
by Zelcious
What percentage of the inner loops use double precision? Can you give a rough estimate?

Re: giga rays on intel phi

Posted: Sat Sep 14, 2013 5:41 pm
by mpeterson
keep in mind that the titan has 2x the horsepower of phi. so phi
is not a bad platform for rt/pt.

Re: giga rays on intel phi

Posted: Mon Sep 16, 2013 1:40 am
by graphicsMan
Yeah, raw FLOPS definitely has little to do with how well a processor will compute specific tasks. I'll be interested to see how these two processors compete as you develop similar specialized kernels for the Titan platform. I think a key thing about Phi is that it has more memory than GPUs have, and going forward memory will likely be a main factor for which platform to choose.

Re: giga rays on intel phi

Posted: Mon Sep 16, 2013 6:22 am
by Dade
graphicsMan wrote:I think a key thing about Phi is that it has more memory than GPUs have, and going forward memory will likely be a main factor for which platform to choose.


There is a Quadro card with 12GB of ram, what is the larger memory configuration available for Xeon Phi ?

Re: giga rays on intel phi

Posted: Mon Sep 16, 2013 10:06 am
by voxelium
Dade wrote:There is a Quadro card with 12GB of ram, what is the larger memory configuration available for Xeon Phi ?

16 GB: http://ark.intel.com/products/75799/Int ... Hz-61-core