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Processor group limits for hyperthreaded 128 threads in Windows

Question asked by brucew on Sep 6, 2019
Latest reply on Jun 11, 2020 by windows_into_amd


We're developing a astrophysical stochastic model which is extremely hpc-intensive.  Using 24 threads, a run takes many days.  Using a 64-core, 128 thread chip would certainly speed our work.  For historical and other reasons, we are developing under Windows which apparently has a 64-thread limit.  My question: is there anything that prevents running two instances of the code, each using 64 threads, concurrently under windows 7 or 10?  Using hyperthreading gives us about a 50% speedup.  Since it is a Markov-chain-type process, summing the results from two concurrent processes works perfectly well.

Is there any definitive reference on the processor group concept for Windows?