Jim,
You can
mpirun --use-hwthread-cpus ...
to have one slot = one hyperthread (default is slot = core)
Note you always have the opportunity to
mpirun --oversubscribe ...
Cheers,
Gilles
- Original Message -
I've just compiled my own version of ompi on Ubuntu 20.04 linux fo
I've just compiled my own version of ompi on Ubuntu 20.04 linux for use
with R and Rmpi etc. It works ok but the maximum number of slaves I can
get is number of cores (20). I used to be able to get the number of
hyperthreaded slots (40). What is the most likely cause of my new problem
and/or how
