[gmx-developers] Hardware threads vs. OpenMP threads
hess at kth.se
Thu Jun 4 12:50:57 CEST 2015
I don't think anything changed in the master branch.
But we do adhere to the OpenMP environment. The value reported in the
message comes from omp_get_num_procs, which should be a report about the
hardware available. OMP_NUM_THREADS sets the number of OpenMP threads to
use, that is respected.
On 2015-06-04 11:21, David van der Spoel wrote:
> why does GROMACS in the master branch not adhere to the OpenMP
> Number of hardware threads detected (16) does not match the number
> reported by OpenMP (8).
> Consider setting the launch configuration manually!
> Reading file md.tpr, VERSION 5.1-beta1-dev-20150603-99a1e1f-dirty
> (single precision)
> Changing nstlist from 10 to 40, rlist from 1.1 to 1.1
> Using 1 MPI process
> Using 16 OpenMP threads
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