Thats correct. Not sure why TCP would have been used - unless IB
interfaces weren't up..
Brian Barrett wrote:
Tim -
Just to make sure I"m not losing it - if any of the "high speed"
networks is found between peers, tcp shouldn't be used between that
pair, right? I was pretty sure that's what the priority code did
now, but wanted to make sure I wasn't losing it ;).
Brian
Begin forwarded message:
From: "Tim S. Woodall" <twood...@lanl.gov>
Date: September 20, 2005 7:51:42 PM GMT+02:00
To: Open MPI Users <us...@open-mpi.org>
Subject: Re: [O-MPI users] HOWTO turn of "multi-rail" support at
runtime?
Reply-To: Open MPI Users <us...@open-mpi.org>
Daryl,
Try setting:
-mca btl_base_include self,mvapi
To specify that only lookback (self) and mvapi btls should be used.
Can you forward me the config.log from your build?
Thanks,
Tim
Daryl W. Grunau wrote:
Hi, I've got a dual-homed IB + GigE connected cluster for which
I've built
a very recent drop of OpenMPI (w/ mvapi support). I'm having
difficulty
making OMPI solely use native verbs as it's communication between
nodes.
I've tried all incantations of the following mca parameters to no
avail:
--mca btl_tcp_if_exclude "lo,eth0,eth1,ib0,ib1"
--mca ptl_tcp_if_include "lo,eth0,eth1,ib0,ib1"
Note I'm putting ib in the list because I really don't wish to use
IP/IB;
OMPI should be able to communicate at the native verbs level,
right? If I
leave ib0/1 unconfigured on my host, OMPI uses eth0 for its
communication.
If I bring up ib0, OMPI uses both eth0 and ib0! Is there any way
I can
specify for it to use none of these TCP interfaces? TIA!
Daryl
P.s. I can send output of ompi_info if that is helpful.
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