Hi, I am trying to accelerate FVCOM by cudaFortran. But it is slower than CPU. I found that data copying took up most of the time. How can I improve it? Host code: SUBROUTINE N2E2D(NVAR,EVAR) use cudafor use cuda_N2E2D IMPLICIT NONE REAL(SP), DIMENSION(0:MT), INTENT(IN) :: N…

Why CudaMemcpyH2D cost a lot of time?

Robert_Crovella November 15, 2023, 2:22pm 2

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