Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |  

This web mail archive is frozen.

This page is part of a frozen web archive of this mailing list.

You can still navigate around this archive, but know that no new mails have been added to it since July of 2016.

Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.

From: Rainer Keller (keller_at_[hidden])
Date: 2006-10-25 12:29:32

Hello dear Katherine,
On Wednesday 25 October 2006 17:43, Katherine Holcomb wrote:
> We currently use MPICH on our Linux clusters, but due to a high
> frequency of semaphore problems we are planning to replace it. OpenMPI
> looks like our best candidate but we have hit a snag. We support
> multiple compilers (specifically PGI and Intel) and due to
> incompatibilities in different vendors' f90 .mod files, we have separate
> directories for OpenMPI with each compiler. Therefore we cannot set a
> global path to the OpenMPI binaries -- it will differ depending on the
> user's choice of compiler. I have read about the --prefix flag and this
> does work, but our users are mostly barely conversant with Unix and many
> would have difficulty finding and specifying the appropriate path. (We
> use the modules software environment currently to set paths and the like
> for them.)
If You use modules already, You can set the path / prefix depending on the
compilers to be used. Additionally, You may provide wrappers to mpirun to
specify the correct prefix, so that for the user nothing will change, so:

/opt/OpenMPI/bin/... mpi-wrappers calling

We have used this kind of setup before to provide different versions of Open

The next Open MPI-1.2 will provide --enable-orterun-prefix-by-default flag to
always have the prefix being passed.

Hope, I could help?

With best regards,

> Is there some way to specify something like "use the same
> path as you are in" from the root process? There was some allusion in
> the FAQ to changing the wrappers to include directives, but the link led
> to a "no such category" page.

Dipl.-Inf. Rainer Keller
 High Performance Computing       Tel: ++49 (0)711-685 6 5858
   Center Stuttgart (HLRS)           Fax: ++49 (0)711-685 6 5832
 POSTAL:Nobelstrasse 19                 email: keller_at_[hidden]     
 ACTUAL:Allmandring 30, R.O.030            AIM:rusraink
 70550 Stuttgart