d that? Thanks.
>Ray
>
>
> From: users on behalf of Ralph Castain via
> users
> Sent: Monday, October 11, 2021 1:49 PM
> To: Open MPI Users
> Cc: Ralph Castain
> Subject: Re: [OMPI users] [External] Re: cpu bi
Yes, I understand. I use mpirun for my self as I want to have more
control. However, when trying to provide our developed code to normal
users, I think I should change all the "mpirun" to "srun" in the batch
scripts, so that the users will not encounter unexpected behavior, as
they use slurm to
Oh my - that is a pretty strong statement. It depends on what you are trying to
do, and whether or not Slurm offers a mapping pattern that matches. mpirun
tends to have a broader range of options, which is why many people use it. It
also means that your job script is portable and not locked to a
OK thank you. Seems that srun is a better option for normal users.
Chang
On 10/11/21 1:23 PM, Ralph Castain via users wrote:
Sorry, your output wasn't clear about cores vs hwthreads. Apparently,
your Slurm config is setup to use hwthreads as independent cpus - what
you are calling "logical cor
Sorry, your output wasn't clear about cores vs hwthreads. Apparently, your
Slurm config is setup to use hwthreads as independent cpus - what you are
calling "logical cores", which is a little confusing.
No, mpirun has no knowledge of what mapping pattern you passed to salloc. We
don't have any
This is not what I need. The cpu can run 4 threads per core, so
"--bind-to core" results in one process occupying 4 logical cores.
I want one process to occupy 2 logical cores, so two processes sharing a
physical core.
I guess there is a way to do that by playing with mapping. I just want
to
You just need to tell mpirun that you want your procs to be bound to cores, not
socket (which is the default).
Add "--bind-to core" to your mpirun cmd line
On Oct 10, 2021, at 11:17 PM, Chang Liu via users mailto:users@lists.open-mpi.org> > wrote:
Yes they are. This is an interactive job from
Yes they are. This is an interactive job from
salloc -N 1 --ntasks-per-node=64 --cpus-per-task=2 --gpus-per-node=4
--gpu-mps --time=24:00:00
Chang
On 10/11/21 2:09 AM, Åke Sandgren via users wrote:
On 10/10/21 5:38 PM, Chang Liu via users wrote:
OMPI v4.1.1-85-ga39a051fd8
% srun bash -c
On 10/10/21 5:38 PM, Chang Liu via users wrote:
> OMPI v4.1.1-85-ga39a051fd8
>
> % srun bash -c "cat /proc/self/status|grep Cpus_allowed_list"
> Cpus_allowed_list: 58-59
> Cpus_allowed_list: 106-107
> Cpus_allowed_list: 110-111
> Cpus_allowed_list: 114-115
> Cpus_allowed_lis
OMPI v4.1.1-85-ga39a051fd8
% srun bash -c "cat /proc/self/status|grep Cpus_allowed_list"
Cpus_allowed_list: 58-59
Cpus_allowed_list: 106-107
Cpus_allowed_list: 110-111
Cpus_allowed_list: 114-115
Cpus_allowed_list: 16-17
Cpus_allowed_list: 36-37
Cpus_allowed_list:
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