I am encountering a strange problem related to the performance of Cuda FFT plan creation here at my workplace. Since last week, our testing department has been reporting that the routines in our software that depend on FFT computation have slowed down significantly. We diagnosed the problem down to abnormally long times for the FFT plan creation.
What is strange is that when we disable the LAN of the PCs, the FFT plan creation becomes fast again.
So my question is: What is (if any) the dependence of CUDA FFT plan generation on network connectivity. If not, what could we possibly be doing wrong here?
We have tried using the sample CuFFT application “simpleCUFFT” and the observations are exactly the same - slow with network on, fast with network disabled.