Re: [mvapich-discuss] [mvapich-discuss] [mpich-discuss] mvapich 1.1 and multipath

[Sergey]

Hi
Thanks for answer
 It need for set specific route for specific source-dest. I study in post graduate and it parts of my scientific work.
 Can I take destLIDs for mpi sender process and exchange it to my specific destLIDs ? I assume it placed in enviroments ? 
 Can MPI process use more than one LID to transmit message to destination rank or sender may use only one LID to transmit ?
 
 Sorry for my english language
 
 
> -----Original Message-----
> From: Matthew Koop <koop at cse.ohio-state.edu>
> To: Sergey <sssmolniy at mail.ru>
> Date: Sat, 7 Mar 2009 23:34:47 -0500 (EST)
> Subject: Re: [mvapich-discuss] [mpich-discuss] mvapich 1.1 and multipath
> 
> > Sergey,
> > 
> > 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 Fri, 6 Mar 2009, Sergey wrote:
> > 
> > > Hi, may be anyone know this ? How mpi process addressing the message
> > > to destination (rank 0 send rank 1)? Through LID, GID, QP ID or
> > > anything else?  Can I strictly define to mpi process outgoing LIDs ?
> > > For example, with LMC = 3, a sender of rank 0, lid 1
> > >                              destination of rank 1 multilid 4
> > >                              destination of rank 2 multilid 8
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> > >
> > 
> 
>