Am 06.06.2014 um 18:58 schrieb Sasso, John (GE Power & Water, Non-GE): > OK, so at the least, how can I get the node and slots/node info that is > passed from PBS? > > I ask because I’m trying to troubleshoot a problem w/ PBS and the build of > OpenMPI 1.6 I noted. If I submit a 24-process simple job through PBS using a > script which has: > > /usr/local/openmpi/bin/orterun -n 24 --hostfile /home/sasso/TEST/hosts.file > --mca orte_rsh_agent rsh --mca btl openib,tcp,self --mca > orte_base_help_aggregate 0 -x PATH -x LD_LIBRARY_PATH > /home/sasso/TEST/simplempihello.exe
Using the --hostfile on your own would mean to violate the granted slot allocation by PBS. Just leave this option out. How do you submit your job? -- Reuti > And the hostfile /home/sasso/TEST/hosts.file contains 24 entries (the first > 16 being host node0001 and the last 8 being node0002), it appears that 24 MPI > tasks try to start on node0001 instead of getting distributed as 16 on > node0001 and 8 on node0002. Hence, I am curious what is being passed by PBS. > > --john > > > From: users [mailto:users-boun...@open-mpi.org] On Behalf Of Ralph Castain > Sent: Friday, June 06, 2014 12:31 PM > To: Open MPI Users > Subject: Re: [OMPI users] Determining what parameters a scheduler passes to > OpenMPI > > We currently only get the node and slots/node info from PBS - we don't get > any task placement info at all. We then use the mpirun cmd options and > built-in mappers to map the tasks to the nodes. > > I suppose we could do more integration in that regard, but haven't really > seen a reason to do so - the OMPI mappers are generally more flexible than > anything in the schedulers. > > > On Jun 6, 2014, at 9:08 AM, Sasso, John (GE Power & Water, Non-GE) > <john1.sa...@ge.com> wrote: > > > For the PBS scheduler and using a build of OpenMPI 1.6 built against PBS > include files + libs, is there a way to determine (perhaps via some debugging > flags passed to mpirun) what job placement parameters are passed from the PBS > scheduler to OpenMPI? In particular, I am talking about task placement info > such as nodes to place on, etc. Thanks! > > --john > _______________________________________________ > 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
