SU2 7.1.1 Test Case Aeroelastic Simulation slow in parallel ?

EternalSeekerX · August 12, 2021, 00:24

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

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.

August 12, 2021, 00:24	SU2 7.1.1 Test Case Aeroelastic Simulation slow in parallel ?	#1
EternalSeekerX Senior Member Sultan Islam Join Date: Dec 2015 Location: Canada Posts: 143 Rep Power: 11	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.

August 12, 2021, 05:07	I figured it out..	#2
EternalSeekerX Senior Member Sultan Islam Join Date: Dec 2015 Location: Canada Posts: 143 Rep Power: 11	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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