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cufftXtMemcpy device to device would change data value(simpleCUFFT_2d_MGPU)? #197

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xiuyangleiasp opened this issue Apr 24, 2023 · 0 comments

xiuyangleiasp commented Apr 24, 2023 •

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Hi,
When I run the simpleCUFFT_2d_MGPU, after the call the result = cufftXtMemcpy(planComplex, d_d_f, d_f, CUFFT_COPY_DEVICE_TO_DEVICE);,I copyData d_f、d_d_f from gpus to host memory, like this,

In host Memory, d_f_out!=d_d_f_out. But according to the cuda docs

cufftXtMemcpy Device to Device just change the order of data in gpus,

So Is there something I do wrong?
Thanks.

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