Radioss jobs not being run in parallel correctly during multi-execution

User: "Ingeniorator"
New Altair Community Member
Updated by Ingeniorator

Hi everyone,

 

I'm running a very basic Radioss crash model in conjunction with morphing in Hyperstudy to find the optimal shape of a lattice. The model results are as expected, however when trying to run several of them at the same time with the solver arguments ${file} -np 2 -nt 1, I find that only two cores out of 32 are used at 100% regardless of the specified number of parallel runs. If, however, 16 jobs are run with ${file} -np 2, then all 32 cores are working at 100% but without any noticeable speedup whatsoever compared to 32 consecutive single job runs. I don't suspect the storage write speed to be an issue as it sits between 0-2% load, and there's plenty of RAM left.

 

The use of the solver arguments -np x -nt 1 turned out to be the fastest in stand-alone Radioss jobs, so it's odd that it does not work as expected with Hyperstudy. Would anyone have any insight?

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