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From: Gleb Natapov (glebn_at_[hidden])
Date: 2006-12-04 05:30:54


On Mon, Dec 04, 2006 at 01:02:48AM +0530, Chevchenkovic Chevchenkovic wrote:
> Is it possible to control the LID where the send and recvs are
> posted.. on either ends?
No, but you can control how much LIDs will be used from available LIDs.
This can be configured with "btl_openib_max_lmc" parameter.

>
> On 12/3/06, Gleb Natapov <glebn_at_[hidden]> wrote:
> > On Sun, Dec 03, 2006 at 07:03:33PM +0530, Chevchenkovic Chevchenkovic wrote:
> > > Hi,
> > > I had this query. I hope some expert replies to it.
> > > I have 2 nodes connected point-to-point using infiniband cable. There
> > > are multiple LIDs for each of the end node ports.
> > > When I give an MPI_Send, Are the sends are posted on different LIDs
> > > on each of the end nodes OR they are they posted on the same LID?
> > > Awaiting your reply,
> > It depend what version of Open MPI your are using. If you are using
> > trunk or v1.2 beta then all available LIDs are used in RR fashion. The early
> > versions don't support LMC.
> >
> > --
> > Gleb.
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> >
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--
			Gleb.