[ofa-general] ***SPAM*** mvapich 1.1 and multipath

[Matthew Koop]

Sergey,

We have answered to your similar questions on mvapich-discuss list.
Below is a copy of the reply.

Matt

***

Messages are sent based on LIDs and QPs. Right now there is no mechanism
to set output LIDs directly. If you use the VIADEV_USE_LMC=1 (MVAPICH) or
MV2_USE_HSAM=1 (MVAPICH2) it should try to spread traffic for you to
maximize performance.

What is the reason for needing this fine-grained control?

Thanks,

Matt


On Sat, 7 Mar 2009, Sergey wrote:

>  Hi,
>    Sorry to my english
>    May be anybody know about this ?
>    How mpi process addressing the message to destination (rank 0 send rank 1)? Through LID, GID, QP ID or anything else? Where from mpi sender to know destination LID ?
>    Can I strictly define outgoing LIDs for specific mpi process ?
>    For example, with LMC = 3, a sender: rank 0, lid 1 communicate with rank 1 and rank 2
>    I want strictly define using multilid 4 for sending rank 0 to rank 1 (multilid 4 = DestLID for rank0 -> rank1)
>    Thanks for all
>    With best regards
>
>
>
>
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