Where do openmp private variables get allocated? On each thread stack, dynamically or through some shared array or something?
Where do openmp private variables get allocated? On each thread stack, dynamically or through
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Where do openmp private variables get allocated? On each thread stack, dynamically or through some shared array or something?
The OpenMP specification doesn’t specify if those variables are to be allocated on the stack or on the heap (and if they are on the heap if it is in a shared array or if there is one object allocated for each thread). Generally I would assume that private variables are allocated on the stack (there is no reason not to and it’s generally more efficient). According to the manual that is the behaviour used in libgomp (the implemention used by gcc) at least, no clue about other implemantations though (although I see little reason why those shouldn’t do the same thing).