[mvapich-discuss] MPI with service level

[Guay Wei Lin]

Hi Hari, 

Thanks for helping. I've managed to get my answer from linux-rdma.
MV2_USE_RDMA_CM is the environment variable that I need.  

Thanks,
Wei Lin

-----Original Message-----
From: Hari Subramoni [mailto:subramon at cse.ohio-state.edu] 
Sent: Wednesday, June 09, 2010 7:42 AM
To: Guay Wei Lin
Cc: mvapich-discuss at cse.ohio-state.edu
Subject: Re: [mvapich-discuss] MPI with service level 

Hi Wei,

Yes, you can tell the MVAPICH2 library to use a particular service level
by setting the environment variable MV2_DEFAULT_SERVICE_LEVEL to the
desired value.

eg: mpirun_rsh -np <num_procs> <host_list>
               MV2_DEFAULT_SERVICE_LEVEL=<desired SL> <path to executable>

Please let us know if you require further help on this regard.

Thx,
Hari.

On Tue, 8 Jun 2010, Guay Wei Lin wrote:

> Hi all,
>
> I'm interested in the MPI traffic that take into the consideration of the
> SL(service level)-Path mapping (as decided by SA/SM). For e.g LASH routing
> algorithm that uses SL/VL as the deadlock avoidance for routing. Is there
> any way that I can make MPI traffic that uses the SL that as indicated by
> the SA/SM? Any help/hints would be appreciated. Thanks again.
>
> Thanks,
> Wei Lin
> PhD student
> Simula Research Laboratory
>
>
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