MPI traffic with service Level

MPI traffic with service Level

[Guay Wei Lin]

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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RE: MPI traffic with service Level

[Hefty, Sean]

> 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.

If MPI is set to use the rdma_cm, it will obtain SL information from the SA.  I believe most MPIs support this option through some means.  Beyond that, there may be other ways to do this based on the MPI that you're using.

- Sean
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RE: MPI traffic with service Level

[Guay Wei Lin]

Thanks, Sean! It's working for me now. 

-----Original Message-----
From: linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
[mailto:linux-rdma-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org] On Behalf Of Hefty, Sean
Sent: Wednesday, June 09, 2010 12:16 AM
To: Guay Wei Lin; linux-rdma-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: RE: MPI traffic with service Level 

> 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.

If MPI is set to use the rdma_cm, it will obtain SL information from the SA.
I believe most MPIs support this option through some means.  Beyond that,
there may be other ways to do this based on the MPI that you're using.

- Sean
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