On the OMPI SVN trunk, we have an "Open MPI extension" call named OMPI_Affinity_str(). Below is an excerpt from the man page. If this is desirable, we can probably get it into 1.5.1.
----- NAME OMPI_Affinity_str - Obtain prettyprint strings of processor affinity information for this process SYNTAX C Syntax #include <mpi.h> #include <mpi-ext.h> int OMPI_Affinity_str(char ompi_bound[OMPI_AFFINITY_STRING_MAX], char current_binding[OMPI_AFFINITY_STRING_MAX], char exists[OMPI_AFFINITY_STRING_MAX]) [snip] OUTPUT PARAMETERS ompi_bound A prettyprint string describing what processor(s) Open MPI bound this process to, or a string indicating that Open MPI did not bind this process. current_binding A prettyprint string describing what processor(s) this process is currently bound to, or a string indicating that the process is bound to all available processors (and is therefore considered "unbound"). exists A prettyprint string describing the available sockets and cores on this host. On Sep 23, 2010, at 11:10 PM, Ralph Castain wrote: > You mean via an API of some kind? Not through an MPI call, but you can do it > (though your code will wind up OMPI-specific). Look at the OMPI source code > in opal/mca/paffinity/paffinity.h and you'll see the necessary calls as well > as some macros to help parse the results. > > Depending upon what version you are using, there may also be a function in > opal/mca/paffinity/base/base.h to pretty-print that info for you. I believe > it may only be in the developer's trunk right now, or it may have made it > into the 1.5.0 release candidate.... > > > On Thu, Sep 23, 2010 at 11:24 AM, Fernando Saez <saezferna...@gmail.com> > wrote: > Hi all, I'm new in the list. I don't know if this post has been treated > before. > > My question is: > > Is there a way in the OMPI library to report which process is running > on which core in a SMP system? I need to know processor affinity for > optimizations issues. > > Regards > > Fernando Saez > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/