问题
Is there a way to set number of threads in OpenMP parallel for region based on the value of a variable? Initially for the whole application number of threads = nofCores. On my AMD FX 8350, nofCores =8. For this area if the variable is 3 then I only need 3 threads. If variable>cores then number of threads should remain equal to nofCores.
I do not want to set the number of threads globally for all the application. Just for this specific parallel loop.
Sorry if this is a naive question, but I am a newbie in OpenMP.
回答1:
Sure .. just tack this on to your parallel for directive:
#pragma parallel for num_threads(variable)
for( ... )
来源：https://stackoverflow.com/questions/19248169/openmp-set-number-of-threads-for-parallel-loop-depending-on-variable