An Introduction to hpxMP...
summary
HPXMP is a drop-in OpenMP runtime that replaces libgomp via LD_PRELOAD the HPXMP shared library and delegates threading and synchronization to the HPX asynchronous many‑task system. It implements pragmas like OpenMP 5 task groups and reductions, supports parallel for and tasks, and runs on multiple OS threads. Microbenchmarks show poor performance at very fine grain sizes, parity or better than GCC at larger grains, but still lags Clang’s runtime.
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