Am 10.01.2018 um 16:55 schrieb Jeff Squyres (jsquyres):
> See https://www.open-mpi.org/faq/?category=tuning#setting-mca-params for a
> little more info on how to set MCA params.
Thanks!
> In terms of physical vs. logical -- are you talking about hyperthreading?
Yes.
> If so, Open MPI uses the
See https://www.open-mpi.org/faq/?category=tuning#setting-mca-params for a
little more info on how to set MCA params.
In terms of physical vs. logical -- are you talking about hyperthreading?
If so, Open MPI uses the number of *cores* (by default), because that's what
"most" HPC users want (I p
Set the MCA param “rmaps_base_oversubscribe=1” in your default MCA param file,
or in your environment
> On Jan 10, 2018, at 4:42 AM, Florian Lindner wrote:
>
> Hello,
>
> a recent openmpi update on my Arch machine seems to have enabled
> --nooversubscribe, as described in the manpage. Since I
Hello,
a recent openmpi update on my Arch machine seems to have enabled
--nooversubscribe, as described in the manpage. Since I
regularly test on my laptop with just 2 physical cores, I want to set
--oversubscribe by default.
How can I do that?
I am also a bit surprised, that openmpi takes the
