Sent: Thursday, February 18, 2010 3:33 AM
To: Open MPI Users
Subject: Re: [OMPI users] Bad Infiniband latency with subounce
Hey,
I only may to add the XRC and RC have the same latency.
What is the command line that you use to run this benchmark ?
What is the system configuration (one hc
.org] On Behalf
Of Pavel Shamis (Pasha)
Sent: Thursday, February 18, 2010 3:33 AM
To: Open MPI Users
Subject: Re: [OMPI users] Bad Infiniband latency with subounce
Hey,
I only may to add the XRC and RC have the same latency.
What is the command line that you use to run this benchmark ?
What is the s
microsecs...
Steve
-Original Message-
From: users-boun...@open-mpi.org [mailto:users-boun...@open-mpi.org] On Behalf
Of Ralph Castain
Sent: Monday, February 15, 2010 11:21 PM
To: Open MPI Users
Subject: Re: [OMPI users] Bad Infiniband latency with subounce
On Feb 15, 2010, at 8:44 PM, Te
1-2 microsecs...
>
> Steve
>
>
> -Original Message-
> From: users-boun...@open-mpi.org [mailto:users-boun...@open-mpi.org] On
> Behalf Of Ralph Castain
> Sent: Monday, February 15, 2010 11:21 PM
> To: Open MPI Users
> Subject: Re: [OMPI users] Bad Infiniban
en-mpi.org] On Behalf
Of Ralph Castain
Sent: Monday, February 15, 2010 11:21 PM
To: Open MPI Users
Subject: Re: [OMPI users] Bad Infiniband latency with subounce
On Feb 15, 2010, at 8:44 PM, Terry Frankcombe wrote:
> On Mon, 2010-02-15 at 20:18 -0700, Ralph Castain wrote:
>> Did you run
On Feb 15, 2010, at 8:44 PM, Terry Frankcombe wrote:
> On Mon, 2010-02-15 at 20:18 -0700, Ralph Castain wrote:
>> Did you run it with -mca mpi_paffinity_alone 1? Given this is 1.4.1, you can
>> set the bindings to -bind-to-socket or -bind-to-core. Either will give you
>> improved performance.
>
On Mon, 2010-02-15 at 20:18 -0700, Ralph Castain wrote:
> Did you run it with -mca mpi_paffinity_alone 1? Given this is 1.4.1, you can
> set the bindings to -bind-to-socket or -bind-to-core. Either will give you
> improved performance.
>
> IIRC, MVAPICH defaults to -bind-to-socket. OMPI defaults
Did you run it with -mca mpi_paffinity_alone 1? Given this is 1.4.1, you can
set the bindings to -bind-to-socket or -bind-to-core. Either will give you
improved performance.
IIRC, MVAPICH defaults to -bind-to-socket. OMPI defaults to no binding.
On Feb 15, 2010, at 6:51 PM, Repsher, Stephen J
