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-   -   SU2 7.1.1 Test Case Aeroelastic Simulation slow in parallel ? (https://www.cfd-online.com/Forums/su2/237912-su2-7-1-1-test-case-aeroelastic-simulation-slow-parallel.html)

EternalSeekerX August 12, 2021 00:24

SU2 7.1.1 Test Case Aeroelastic Simulation slow in parallel ?
 
Hello everyone,


So I noticed that if i compile SU2 with support for AD forward, the aeroelastic test case runs awefully slow in parallel, seems like the process goes to sleep and then wakes up and runs a bit and sleeps again. However i ran it with a version compiled without AD forward support and it runs fine? Anyone know why?


Im using Fedora 34 with gcc 11 and openmpi 4.1.1.

EternalSeekerX August 12, 2021 05:07

I figured it out..
 
Well I found out why it was happening. I accidently compiled one with mpi+threads. That's why my system was spawning many threads and half of them were sleeping. I guess that would be good for over network with shared memory.


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