how to set the number cpus in FFTW mpi

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how to set the number cpus in FFTW mpi #298

Open ztdepztdep opened 2 years ago

ztdepztdep commented 2 years ago

I can botain correct results when i set the number of cpu is 1 , 2 ,4 for N = 40. but when I set the cpu=8 or 10, it gives me totally wrong results. Could you please give me some advices aboub thow to set the number of cpus.