From: George Bosilca
Sent: Saturday, February 12, 2022 7:38:02 AM
To: Bertini, Denis Dr.
Cc: Open MPI Users; Joseph Schuchart
Subject: Re: [OMPI users] Using OSU benchmarks for checking Infiniband network
I am not sure I understand the comment about MPI_T.
Each network card has internal
11, 2022 4:25:42 PM
> *To:* Open MPI Users
> *Cc:* Joseph Schuchart; Bertini, Denis Dr.
> *Subject:* Re: [OMPI users] Using OSU benchmarks for checking Infiniband
> network
>
> Collecting data during execution is possible in OMPI either with an
> external tool, such as mpiP, or the in
From: George Bosilca
Sent: Friday, February 11, 2022 4:25:42 PM
To: Open MPI Users
Cc: Joseph Schuchart; Bertini, Denis Dr.
Subject: Re: [OMPI users] Using OSU benchmarks for checking Infiniband network
Collecting data during execution is possible in OMPI either
uot;
>
> But i do not know what it is meant with "modified" openMPI ?
>
>
> Cheers,
>
> Denis
>
>
> --
> *From:* Joseph Schuchart
> *Sent:* Friday, February 11, 2022 3:02:36 PM
> *To:* Bertini, Denis Dr.; Open MPI Users
> *Subje
I ?
Cheers,
Denis
From: Joseph Schuchart
Sent: Friday, February 11, 2022 3:02:36 PM
To: Bertini, Denis Dr.; Open MPI Users
Subject: Re: [OMPI users] Using OSU benchmarks for checking Infiniband network
I am not aware of anything similar in Open MPI. Maybe OSU-INAM can
@lists.open-mpi.org
*Cc:* Joseph Schuchart
*Subject:* Re: [OMPI users] Using OSU benchmarks for checking
Infiniband network
Hi Denis,
Sorry if I missed it in your previous messages but could you also try
running a different MPI implementation (MVAPICH) to see whether Open MPI
is at fault
users
Sent: Tuesday, February 8, 2022 4:02:53 PM
To: users@lists.open-mpi.org
Cc: Joseph Schuchart
Subject: Re: [OMPI users] Using OSU benchmarks for checking Infiniband network
Hi Denis,
Sorry if I missed it in your previous messages but could you also try
running a different MPI implementation
:02:53 PM
To: users@lists.open-mpi.org
Cc: Joseph Schuchart
Subject: Re: [OMPI users] Using OSU benchmarks for checking Infiniband network
Hi Denis,
Sorry if I missed it in your previous messages but could you also try
running a different MPI implementation (MVAPICH) to see whether Open MPI
*From:* users on behalf of Gus
Correa via users
*Sent:* Monday, February 7, 2022 9:14:19 PM
*To:* Open MPI Users
*Cc:* Gus Correa
*Subject:* Re: [OMPI users] Using OSU benchmarks for checking
Infiniband network
This may have changed
*Sent:* Monday, February 7, 2022 9:14:19 PM
*To:* Open MPI Users
*Cc:* Gus Correa
*Subject:* Re: [OMPI users] Using OSU benchmarks for checking Infiniband
network
This may have changed since, but these used to be relevant points.
Overall, the Open MPI FAQ have lots of good suggestions:
https://ww
Do also check whether there are any performance measurements available
from your infiniband switch provider that will allow checking of correct
functionality at the single switch level.
>
>
> Best
>
> Denis
>
> ------------------------
> *From:* users on behal
e switch level.
Best
Denis
*From:* users on behalf of Gus Correa
via users
*Sent:* Monday, February 7, 2022 9:14:19 PM
*To:* Open MPI Users
*Cc:* Gus Correa
*Subject:* Re: [OMPI users] Using OSU benchmarks for checking Infiniband
network
This may have changed since, but these used to be rele
Denis
From: users on behalf of Gus Correa via
users
Sent: Monday, February 7, 2022 9:14:19 PM
To: Open MPI Users
Cc: Gus Correa
Subject: Re: [OMPI users] Using OSU benchmarks for checking Infiniband network
This may have changed since, but these used to be relevant
run mpi in verbose mode in order
> >
> > to further investigate this behaviour?
> >
> > Best
> >
> > Denis
> >
> > ----
> > *From:* users on behalf of Benson
> > Muite via u
-
> *From:* users on behalf of Benson
> Muite via users
> *Sent:* Monday, February 7, 2022 2:27:34 PM
> *To:* users@lists.open-mpi.org
> *Cc:* Benson Muite
> *Subject:* Re: [OMPI users] Using OSU benchmarks for checking Infiniband
> network
> Hi,
> Do you get sim
rs on behalf of Benson
> Muite via users
> *Sent:* Monday, February 7, 2022 2:27:34 PM
> *To:* users@lists.open-mpi.org
> *Cc:* Benson Muite
> *Subject:* Re: [OMPI users] Using OSU benchmarks for checking Infiniband
> network
> Hi,
> Do you get similar results when you rep
crepancy at the
message size of 16384.
May be there is a way to run mpi in verbose mode in order
to further investigate this behaviour?
Best
Denis
*From:* users on behalf of Benson
Muite via users
*Sent:* Monday, Febru
, February 7, 2022 2:27:34 PM
To: users@lists.open-mpi.org
Cc: Benson Muite
Subject: Re: [OMPI users] Using OSU benchmarks for checking Infiniband network
Hi,
Do you get similar results when you repeat the test? Another job could
have interfered with your run.
Benson
On 2/7/22 3:56 PM, Bertini, Denis Dr
Hi,
Do you get similar results when you repeat the test? Another job could
have interfered with your run.
Benson
On 2/7/22 3:56 PM, Bertini, Denis Dr. via users wrote:
Hi
I am using OSU microbenchmarks compiled with openMPI 3.1.6 in order to
check/benchmark
the infiniband network for our
Hi
I am using OSU microbenchmarks compiled with openMPI 3.1.6 in order to
check/benchmark
the infiniband network for our cluster.
For that i use the collective all_reduce benchmark and run over 200 nodes,
using 1 process per node.
And this is the results i obtained
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