Thread safety: single-threaded FFTs in parallel

[jj-du-plessis]

I am running multiple single-threaded Julia programs on a multi-threaded CPU. Each program runs an FFT plan and then executes that plan many times. While each program applies the FFT to different arrays, all the arrays are of the same size and type.

Is this approach thread safe? If not, I can of course generate an FFT plan first on a single thread, but how do I save an existing FFT plan and import it into a different Julia program?

[giordano]

Is this approach thread safe?

Thread safety is a concept relevant to shared-memory applications. As far as I understand, you're running independent Julia processes which share nothing, so there should be no concerns about thread safety.