Great. Thanks.
Gerry
On 6/16/2017 2:13 PM, Ben Barsdell on CASPER mailing list wrote:
In vanilla xGPU this is not necessary. I believe it is needed in the
dp4a branch though, and there it's done as a pre-processing step in
GPU memory.
On 16 June 2017 at 12:48, Gerald Harp <gh...@seti.org
<mailto:gh...@seti.org>> wrote:
Hi David, or whomever
We have found that to make best use of vector operations in the
Xeon Phi machines that we have to de-interleave the complex data.
That is a single long array of length 2N
[re1, im1, re2, im2, ....,reN, imN]
gets de-interleaved into two arrays
[re1, re2, ....,reN]
[im1, im2,..., imN]
before the data are loaded into the vector registers. Is this
done in XGPU, or is it not necessary?
If de-interleaving is done, then where is it done? In the GPU? Or
in memory prior to GPU?
Thanks
Gerry
--
Gerald (Gerry) R. Harp, PhD
Director, SETI Research / Senior Scientist
SETI Institute
189 Bernardo, Ste. 200
Mountain View, CA 94043
650-960-4576 <tel:650-960-4576>
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