[mvapich-discuss] MVAPICH+IB] mvapich2-1.0.1 in IB network when openSM with LASH is running

[Dhabaleswar Panda]

On Wed, 28 Nov 2007, Keshetti Mahesh wrote:

> Has anyone in the list ever tested MVAPICH in infiniband network
> in which openSM is running with LASH routing algorithm enabled?

We have not studied this combination completely.

Thanks,

DK

> I also haven't tested the above case but i can foresee a problem
> because LASH routing algorithm in openSM uses virtual
> lanes (VL) which are directly mapped with service levels (SL)
> of infiniband network.And LASH routing algorithm assigns different
> VLs ( thus SLs) to different paths in the network. This SL <-> path association
> information is available only through the subnet manager (openSM) during
> connection establishment.But AFAIK, mvapich don't use the services of subnet
> manager for connection establishment between nodes. So I want to know
> whether anyone thought about it and working on it or not.
>
> regards,
> Mahesh
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