release/18x: [OpenMP][AIX] Affinity implementation for AIX (#84984) #86695
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This patch implements
affinity
for AIX, which is quite different from platforms such as Linux.bindprocessor()
is used to bind a thread to one CPU per call.get_system_affinity()
for AIX gets the mask of all available CPUs, to be used as the full mask only.This patch has run through the libomp LIT tests successfully with
affinity
enabled.(cherry picked from commit d394f3a)
Note: We need to include this patch in the libomp of the next IBM OpenXL for AIX compiler deliverable which is built off LLVM v18. This cherry-pick has been re-based on
release/18.x
. Changes in this patch are guarded for AIX and should not affect other platforms.