#1964: Binary neutron star sample has poor OpenMP parallelization ------------------------------------+--------------------------------------- Reporter: anonymous | Owner: Type: enhancement | Status: new Priority: unset | Milestone: Component: EinsteinToolkit thorn | Version: development version Resolution: | Keywords: NsNs ------------------------------------+---------------------------------------
Comment (by anonymous):
This was run on a single node using
OMP_NUM_THREADS=16 mpirun -np 2 cactus ns.par
It seemed that most of the time it was using 200% only.
Later doing "the same" run again it suddenly did full 1600%, so there seems to be no issue.
It was during the evolution, while the iterations incremented, so that suggested that it was that low during the whole iteration, which seemed weird.
I tried it again and it was fine!