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CUDA 4.1 FFT 50% Performance Drop #1

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kspaff opened this issue Feb 29, 2012 · 1 comment

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bug

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kspaff commented Feb 29, 2012

With the new LLVM compiler backend, CUDA FFT performance dropped by 50% on Keeneland. OpenCL performance stayed the same.

I suspect this might be due to loops being unrolled differently (the unroll option that used to go to the old compiler is now ignored).

kspaff mentioned this issue

GEMM Hangs Cypress on AMD OCL 2.6 #8

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Contributor Author

kspaff commented Apr 13, 2014

Fixed some time ago, FFT can now be built to use cufft

kspaff closed this as completed

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