[Pw_forum] a strange behavior for QE-v4 compared with QE-v3

[Lorenzo Paulatto]

JR Schmidt ha scritto:
> I ran into this same issue.  Let me say that (for whatever reason) 
> setting OMP_NUM_THREADS, or MKL_NUM_THREADS did not seem to fix the 
> problem.  MKL was still creating many threads per process, though 
>   

If you are running a job on several nodes it may be tricky to ensure
the  OMP_NUM_THREADS variable is set correctly on all of them. Using the
-x option of mpirun can be a solution, if you use open-mpi

bye

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