Does EPYC 7H12 Support MPI simulation (ANSYS CFX, FLUENT, ICEPAK )?
Recently, I tried to run a CFD calclation (16 threads chosed for parallel computation )on a worksation with EPYC 7H12 *2 , 256GB RAM.
In the task management , I found that ONLY 0.5% usage was occupied for each thead?
How can I fix this problem? Is there anyone facing the same kind of problem now?
Judging by the ratio of the share of employment per core, Hyper Transport is enabled for both processors, a quite expected value with the number of threads 100/2*64*2=0.4% (Windows10 or Server2019 and later slightly overestimates the thread's core/thread usage).
Both in the case of AMD and in the case of Intel for 2 or more processor systems, it is necessary to turn off HyperTrasport/HyperTreating for efficient calculation, otherwise there will be no gain in comparison with a single CPU. OS exclusively windows server, no windows 10.
From my experience, it is based on a 2-processor LGA-3647 system. There should be the same regularity for 2 processor AMD systems.