SPMD Optimization

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A

Hello,

 

I want to start an SPMD Optimization (DDM) with 6 physical cores/Domains (-np 6) and two threads per core (-nt 2?). I have a system with 6 sockets, due to hyperthreading I have 12 cores. With the following I only get an optimization with 6 domains and 1 thread per core:

 

optistruct.bat -mpi -ddm -np 6 'xxxx\xxxx\xxx.fem' -nt 2 -core in -check

 

How do I fix this? It keeps saying 1 thread per core and it works, but I want to try the hybrid SPMD with SMP (-np 6 -nt 2). Even with deactivated hyperthreading (6 cores) and -np 3 -nt 2 I get 3 domains and 1 thread.

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