Hi
I am trying to build qe 7 for windows and to use OpenMP parallelization.
I use cygwin64 and gpfortran ...
>From the manual I understand OpenMP builds should be done by
configure --enable-openmp --disable-parallel
This will enable OpenMP and disable MPI parallelization , correct ?
I have an old binary of QE 6.4.1. made by others witch state in the header:
Parallel version (MPI & OpenMP), running on 4 processor cores
Number of MPI processes: 1
Threads/MPI process: 4
MPI processes distributed on 1 nodes
And it run very fast utilizing really 4 cores ...
My QE 7 build reports:
Serial multi-threaded version, running on 4 processor cores
0 MiB available memory on the printing compute node when the environment
starts
And it runs very slow (more than 8x than the 6.4.1 build ) ...
Why QE 7 does not report OpenMP usage in the header ?
Does anybody have experiences with making a good Windows QE build
utilizing OpenMP ?
Michal Husak
UCT Prague
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