I added this to the trunk in r30568 - a new MCA param "ras_tm_smp_mode" will tell us to use the PBS_PPN envar to get the number of slots allocated per node. We then just use the PBS_Nodefile to read the names of the nodes, which I expect will be one for each partition.
Let me know if this solves the problem - I scheduled it for 1.7.5 Thanks! Ralph On Jan 31, 2014, at 4:33 PM, Ralph Castain <r...@open-mpi.org> wrote: > No worries about PBS itself - better to allow you to just run this way. Easy > to add a switch for this purpose. > > For now, just add --oversubscribe to the command line > > On Jan 31, 2014, at 3:32 PM, Paul Hargrove <phhargr...@lbl.gov> wrote: > >> Ralph, >> >> The mods may have been done by the staff at PSC rather than by SGI. >> Note the "_psc" suffix: >> $ which pbsnodes >> /usr/local/packages/torque/2.3.13_psc/bin/pbsnodes >> >> Their sources appear to be available in the f/s too. >> Using "tar -d" to compare that to the pristine torque-2.3.13 tarball show >> the following files were modified: >> torque-2.3.13/src/resmom/job_func.c >> torque-2.3.13/src/resmom/mom_main.c >> torque-2.3.13/src/resmom/requests.c >> torque-2.3.13/src/resmom/linux/mom_mach.h >> torque-2.3.13/src/resmom/linux/mom_mach.c >> torque-2.3.13/src/resmom/linux/cpuset.c >> torque-2.3.13/src/resmom/start_exec.c >> torque-2.3.13/src/scheduler.tcl/pbs_sched.c >> torque-2.3.13/src/cmds/qalter.c >> torque-2.3.13/src/cmds/qsub.c >> torque-2.3.13/src/cmds/qstat.c >> torque-2.3.13/src/server/resc_def_all.c >> torque-2.3.13/src/server/req_quejob.c >> torque-2.3.13/torque.spec >> >> I'll provide what assistance I can in testing. >> That includes providing (off-list) the actual diffs of PSC's torque against >> the tarball, if desired. >> >> In the meantime, since -npernode didn't work, what is the right way to say: >> "I have 1 slot but I want to overcommit and run 16 mpi ranks". >> >> -Paul >> >> >> On Fri, Jan 31, 2014 at 3:20 PM, Ralph Castain <r...@open-mpi.org> wrote: >> >> On Jan 31, 2014, at 3:13 PM, Paul Hargrove <phhargr...@lbl.gov> wrote: >> >>> Ralph, >>> >>> As I said this is NOT a cluster - it is a 4k-core shared memory machine. >> >> I understood - that wasn't the nature of my question >> >>> TORQUE is allocating cpus (time-shared mode, IIRC), not nodes. >>> So, there is always exactly one line in $PBS_NODESFILE. >> >> Interesting - because that isn't the standard way Torque behaves. It is >> supposed to put one line/slot in the nodefile, each line containing the name >> of the node. Clearly, SGI has reconfigured Torque to do something different. >> >>> >>> The system runs as 2 partitions of 2k-cores each. >>> So, the contents odf$PBS_NODESFILE has exactly 2 possible values, each 1 >>> line. >>> >>> The values of PBS_PPN and PBS_NCPUS both reflect the size of the allocation. >>> >>> At a minimum, shouldn't Open MPI be multiplying the lines in $PBS_NODESFILE >>> by the value of $PBS_PPN? >> >> No, as above, that isn't the way Torque generally behaves. It would appear >> that we need a "switch" here to handle SGI's modifications. Should be doable >> - just haven't had anyone using an SGI machine before :-) >> >>> >>> Additionally, when I try "mpirun -npernode 16 ./ring_c" I am still told >>> there are not enough slots. >>> Shouldn't that be working with 1 line is $PBS_NODESFILE? >>> >>> -Paul >>> >>> >>> >>> >>> On Fri, Jan 31, 2014 at 2:47 PM, Ralph Castain <r...@open-mpi.org> wrote: >>> We read the nodes from the PBS_NODEFILE, Paul - can you pass that along? >>> >>> On Jan 31, 2014, at 2:33 PM, Paul Hargrove <phhargr...@lbl.gov> wrote: >>> >>>> I am trying to test the trunk on an SGI UV (to validate Nathan's port of >>>> btl:vader to SGI's variant of xpmem). >>>> >>>> At configure time, PBS's TM support was correctly located. >>>> >>>> My PBS batch script includes >>>> #PBS -l ncpus=16 >>>> because that is what this installation requires (not nodes, mppnodes, or >>>> anything like that). >>>> One is allocating cpus on a large shared-memory machine, not a set of >>>> nodes in a cluster. >>>> >>>> However, this appears to be causing mpirun to think I have just 1 slot: >>>> >>>> + mpirun -np 2 ./ring_c >>>> -------------------------------------------------------------------------- >>>> There are not enough slots available in the system to satisfy the 2 slots >>>> that were requested by the application: >>>> ./ring_c >>>> >>>> Either request fewer slots for your application, or make more slots >>>> available >>>> for use. >>>> -------------------------------------------------------------------------- >>>> >>>> In case they contain useful info, here are the PBS env vars in the job: >>>> >>>> PBS_HT_NCPUS=32 >>>> PBS_VERSION=TORQUE-2.3.13 >>>> PBS_JOBNAME=qs >>>> PBS_ENVIRONMENT=PBS_BATCH >>>> PBS_HOME=/var/spool/torque >>>> PBS_O_WORKDIR=/usr/users/6/hargrove/SCRATCH/OMPI/openmpi-trunk-linux-x86_64-uv-trunk/BLD/examples >>>> PBS_PPN=16 >>>> PBS_TASKNUM=1 >>>> PBS_O_HOME=/usr/users/6/hargrove >>>> PBS_MOMPORT=15003 >>>> PBS_O_QUEUE=debug >>>> PBS_O_LOGNAME=hargrove >>>> PBS_O_LANG=en_US.UTF-8 >>>> PBS_JOBCOOKIE=9EEF5DF75FA705A241FEF66EDFE01C5B >>>> PBS_NODENUM=0 >>>> PBS_O_SHELL=/usr/psc/shells/bash >>>> PBS_SERVER=tg-login1.blacklight.psc.teragrid.org >>>> PBS_JOBID=314827.tg-login1.blacklight.psc.teragrid.org >>>> PBS_NCPUS=16 >>>> PBS_O_HOST=tg-login1.blacklight.psc.teragrid.org >>>> PBS_VNODENUM=0 >>>> PBS_QUEUE=debug_r1 >>>> PBS_O_MAIL=/var/mail/hargrove >>>> PBS_NODEFILE=/var/spool/torque/aux//314827.tg-login1.blacklight.psc.teragrid.org >>>> PBS_O_PATH=[...removed...] >>>> >>>> If any additional info is needed to help make mpirun "just work", please >>>> let me know. >>>> >>>> However, at this point I am mostly interested in any work-arounds that >>>> will let me run something other than a singleton on this system. >>>> >>>> -Paul >>>> >>>> -- >>>> Paul H. Hargrove phhargr...@lbl.gov >>>> Future Technologies Group >>>> Computer and Data Sciences Department Tel: +1-510-495-2352 >>>> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900 >>>> _______________________________________________ >>>> devel mailing list >>>> de...@open-mpi.org >>>> http://www.open-mpi.org/mailman/listinfo.cgi/devel >>> >>> >>> _______________________________________________ >>> devel mailing list >>> de...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/devel >>> >>> >>> >>> -- >>> Paul H. Hargrove phhargr...@lbl.gov >>> Future Technologies Group >>> Computer and Data Sciences Department Tel: +1-510-495-2352 >>> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900 >>> _______________________________________________ >>> devel mailing list >>> de...@open-mpi.org >>> http://www.open-mpi.org/mailman/listinfo.cgi/devel >> >> >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel >> >> >> >> -- >> Paul H. Hargrove phhargr...@lbl.gov >> Future Technologies Group >> Computer and Data Sciences Department Tel: +1-510-495-2352 >> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900 >> _______________________________________________ >> devel mailing list >> de...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/devel >
