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Subject: Re: [OMPI users] selectively bind MPI to one HCA out of available ones
From: Rolf Vandevaart (Rolf.Vandevaart_at_[hidden])
Date: 2009-07-15 09:43:47


As Lenny said, you should use the if_include parameter. Specifically,
it would look like this depending on which ones you want to select.

-mca btl_openib_if_include mtcha0

or

-mca btl_openib_if_include mtcha1

Rolf

On 07/15/09 09:33, neeraj_at_[hidden] wrote:
>
> Thanks Ralph,
>
> i found the mca parameter. It is btl_openib_max_btls which
> controls the available HCAs.
>
> Thanks for helping.
>
> Regards
>
> Neeraj Chourasia (MTS)
> Computational Research Laboratories Ltd.
> (A wholly Owned Subsidiary of TATA SONS Ltd)
> B-101, ICC Trade Towers, Senapati Bapat Road
> Pune 411016 (Mah) INDIA
> (O) +91-20-6620 9863 (Fax) +91-20-6620 9862
> M: +91.9225520634
>
>
>
> *Ralph Castain <rhc_at_[hidden]>*
> Sent by: users-bounces_at_[hidden]
>
> 07/15/2009 06:54 PM
> Please respond to
> Open MPI Users <users_at_[hidden]>
>
>
>
> To
> Open MPI Users <users_at_[hidden]>
> cc
>
> Subject
> Re: [OMPI users] selectively bind MPI to one HCA out of available
> ones
>
>
>
>
>
>
>
>
> Take a look at the output from "ompi_info --params btl openib" and you
> will see the available MCA params to direct the openib subsystem. I
> believe you will find that you can indeed specify the interface.
>
>
> On Wed, Jul 15, 2009 at 7:15 AM, <_neeraj_at_[hidden]_
> <mailto:neeraj_at_[hidden]>> wrote:
>
> Hi all,
>
> I have a cluster where both HCA's of blade are active, but
> connected to different subnet.
> Is there an option in MPI to select one HCA out of available
> one's? I know it can be done by making changes in openmpi code, but i
> need clean interface like option during mpi launch time to select mthca0
> or mthca1?
>
> Any help is appreciated. Btw i just checked Mvapich and feature
> is there inside.
>
> Regards
>
> Neeraj Chourasia (MTS)
> Computational Research Laboratories Ltd.
> (A wholly Owned Subsidiary of TATA SONS Ltd)
> B-101, ICC Trade Towers, Senapati Bapat Road
> Pune 411016 (Mah) INDIA
> (O) +91-20-6620 9863 (Fax) +91-20-6620 9862
> M: +91.9225520634
>
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