[mvapich-discuss] LMC modifications

[Chevchenkovic Chevchenkovic]

I am looking at some modifications to the existing stack with multirail support.
So can someone suggest changes so that LMC enabled IB networks could be used?
-chev


On 5/11/07, Abhinav Vishnu <vishnu at cse.ohio-state.edu> wrote:
> Hi Chevchenkovic,
>
> Thanks for using MVAPICH. I hope that you are using MVAPICH 0.9.9
> version for your evaluation.
>
> For your problem, you may not need to hardcode any values for using
> LIDs 13 and 19. With 0.9.9 version, MVAPICH supports multi-pathing
> using LMC mechanism. For your purpose, adding the following environment
> variable during the execution of your program:
>
> % mpirun_rsh -np 2 node1 node2 VIADEV_USE_LMC=1 ./prog
>
> More details for this parameter are present at the following link of
> MVAPICH user guide:
>
> http://mvapich.cse.ohio-state.edu/support/mvapich_user_guide.html#x1-690009.1.6
>
> Details about MVAPICH multi-pathing are present at:
>
> http://mvapich.cse.ohio-state.edu/support/mvapich_user_guide.html#x1-240005.7
>
> Please let us know the outcome of your experimentation.
>
> Thanks,
>
> :- Abhinav
>
> * On May,1 Chevchenkovic Chevchenkovic<chevchenkovic at gmail.com> wrote :
> > Hi,
> > I had this problem. I had the following configuration problem:
> > node 1 : port 1  : LMC = 1 , LIDs = 12,13 (rank 0)
> > node 2 : port 1  : LMC = 1 , LIDs = 18,19 (rank 1)
> >
> > I would like to perform send/recv using lid 13 and 19. I would like
> > to hardcode these values. How do i proceed with the modifications in
> > the MVAPICH stack?
> > I dont mind hardcoding these details in the stack itself.
> > Awaiting reply,
> > -Chev
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