Appreciate it - but as I said in my prior note, we aren’t maintaining 1.6 any more, so an upgrade to 1.8 (which worked, as you noted) is in order
> On Mar 13, 2015, at 8:23 AM, Chris Paciorek <pacio...@stat.berkeley.edu> > wrote: > > And the promised attachment. > > On Thu, Mar 12, 2015 at 6:11 PM, Chris Paciorek > <pacio...@stat.berkeley.edu <mailto:pacio...@stat.berkeley.edu>> wrote: >> I'm having an issue with MPI_Comm_spawn not starting workers on the >> nodes provided via -machinefile or -host. This is occurring on Ubuntu >> 14.04/14.10 with openMPI 1.6.5. However, I do not have the problem on >> Ubuntu 12.04 with openMPI 1.4.3 nor is there a problem when I install >> openMPI 1.8.4 from source on Ubuntu 14.04. >> >> Any suggestions as to what is going on? We can install from source to >> deal with this, but Ubuntu 14.04/14.10/15.04 (and I think the current >> Debian) are all relying on 1.6.5 so this issue might affect many >> others. >> >> As far as I can tell there aren't any threads on the mailing lists or >> info in the NEWS file that relate to this. >> >> Here's a reproducible test case. In the attached zip file, parent.cpp >> generates an executable that simply tries to spawn workers using >> MPI_Comm_spawn and the child executable simply reports what nodes the >> workers are operating on. >> >> I compile and run the program as: >> mpicxx -o child child.cpp >> mpicxx -o parent parent.cpp >> mpirun -host smeagol,arwen,smeagol,arwen -np 1 parent >> >> And the result is as follows with all children on the original node: >> Starting: I'm process 0 and we are 1 >> Finishing: I'm process 0 and we are 1 >> I'm child process 0 on smeagol and we are 3 >> I'm child process 1 on smeagol and we are 3 >> My parent communicator size is: 3 >> I'm child process 2 on smeagol and we are 3 >> My parent communicator size is: 3 >> My parent communicator size is: 3 >> >> This is all on pretty standard Ubuntu 14.04, with openMPI installed >> from Ubuntu (libopenmpi-dev, libopenmpi1.6, openmpi-bin) >> >> I've included in the zip file: >> * parent.cpp and child.cpp >> * ompi_info --all on the master >> * ompi_info -v ompi full --parsable on all nodes >> * PATH and LD_LIBRARY_PATH info >> * ifconfig information >> >> -Chris >> >> ---------------------------------------------------------------------------------------------- >> Chris Paciorek >> >> Statistical Computing Consultant >> Statistical Computing Facility, Econometrics Laboratory, Berkeley >> Research Computing >> >> Office: 495 Evans Hall Email: pacio...@stat.berkeley.edu >> Mailing Address: Voice: 510-842-9056 >> Department of Statistics Fax: 510-642-7892 >> 367 Evans Hall Skype: cjpaciorek >> University of California, Berkeley WWW: >> www.stat.berkeley.edu/~paciorek >> Berkeley, CA 94720 USA Permanent forward: >> pacio...@alumni.cmu.edu > <mpi_comm_spawn_problem.tgz>_______________________________________________ > users mailing list > us...@open-mpi.org <mailto:us...@open-mpi.org> > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > <http://www.open-mpi.org/mailman/listinfo.cgi/users> > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/03/26468.php > <http://www.open-mpi.org/community/lists/users/2015/03/26468.php>
