In general, you need a functioning IB subsystem on your machines for
OMPI to build for and use IB. This includes both the set of kernel
drivers and the userspace libraries. In particular, Open MPI v1.2
uses the "ibverbs" library. If OMPI can find the ibverbs library and
headers during its configure phase, it will build IB support and try
to use it at run time.
You can see if OMPI finds what it needs in the stdout of configure --
search for the string "openib" and see where it configures the BTL
openib component. If it ends with a message indicating that it will
compile the openib BTL component, then you're good. If not, you'll
see some specific tests that fail that indicate why it won't include
that support (e.g., can't find the right header files or somesuch).
On Dec 19, 2007, at 8:49 AM, pat.o'bry...@exxonmobil.com wrote:
Brian,
Here is how I do it:
./configure --prefix /opt/openmpi-1.2.4 --with-openib=/usr/local/
ofed \
--without-tm CC=icc CXX=icpc F77=ifort FC=ifort \
--with-threads=posix --enable-mpi-threads
J.W. (Pat) O'Bryant,Jr.
Business Line Infrastructure
Technical Systems, HPC
Office: 713-431-7022
"Brian Budge"
<brian.budge@g
mail.com> To
Sent by: "Open MPI Users"
users-bounces@ <us...@open-mpi.org>
open-
mpi.org cc
Subject
12/19/07 12:35 [OMPI users] new to MPI
+infiniband
AM
Please respond
to
Open MPI Users
<users@open-mp
i.org>
Hi all -
I have been using OpenMPI for quite a while now, and its working out
great.
I was looking at the FAQ and trying to figure out how to configure
OpenMPI
with infiniband. It shows how to enable IB pointing to the OFED
directory.
I have infiniband built into the kernel, along with IP over IB and
with the
Mellanox drivers. What would I still need to install, and how would I
configure OpenMPI to work with this?
Thanks,
Brian_______________________________________________
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--
Jeff Squyres
Cisco Systems
