Getting the number of workers used by opencilk

[yiansu]

I'm writing a manually optimized program using opencilk and need to know the number of threads used by the runtime.

I know how to set the number of worker threads used by opencilk through the environment variable CILK_NWORKERS=... However, does opencilk provide any facility/built-in function to get this number inside the program?

[neboat]

Yes, a program can get the number of Cilk workers by calling __cilkrts_get_nworkers(), which is declared in cilk/cilk_api.h.

Does that resolve your issue?

[yiansu]

Yes I'm able to extract the number of workers using that function. Thanks for the help!