Hello,
Up to now, I have been using numerous ways of binding with wrappers
(numactl, taskset) whenever I wanted to play with core placing. Another way
I have been using is via -rankfile, however I notice that some ranks jump
from thread 0 to thread 1 on SMT chips. I can control this with numactl f
Luis,
you can pass the --bind-to hwthread option in order to bind on the first
thread of each core
Cheers,
Gilles
On Fri, Sep 8, 2023 at 8:30 PM Luis Cebamanos via users <
users@lists.open-mpi.org> wrote:
> Hello,
>
> Up to now, I have been using numerous ways of binding with wrappers
> (numa
In addition to what Gilles mentioned, I'm curious: is there a reason you have
hardware threads enabled? You could disable them in the BIOS, and then each of
your MPI processes can use the full core, not just a single hardware thread.
From: users on behalf of Lui
