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Subject: Re: [OMPI users] Performance question about OpenMPI and MVAPICH2 on IB
From: Terry Dontje (Terry.Dontje_at_[hidden])
Date: 2009-08-07 07:40:37


Hi Neeraj,

Were there specific collectives that were slower? Also what kind of cluster were you running on? How many nodes and cores per node?

thanks,

--td
> Message: 3
> Date: Fri, 7 Aug 2009 16:51:05 +0530
> From: neeraj_at_[hidden]
> Subject: Re: [OMPI users] Performance question about OpenMPI and
> MVAPICH2 on IB
> To: Open MPI Users <users_at_[hidden]>
> Cc: users_at_[hidden], users-bounces_at_[hidden]
> Message-ID:
> <OF62A95E62.D6758124-ON6525760B.003E2874-6525760B.003E1A66_at_[hidden]>
>
> Content-Type: text/plain; charset="us-ascii"
>
> Hi Terry,
>
> I feel hierarchical collectives are slower compare to tuned one. I
> had done some benchmark in the past specific to collectives, and this is
> what i feel based on my observation.
>
> Regards
>
> Neeraj Chourasia (MTS)
> Computational Research Laboratories Ltd.
> (A wholly Owned Subsidiary of TATA SONS Ltd)
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