Hi Igor As I recall, this eventually traced back to a change in slurm at some point. I believe the latest interpretation is in line with your suggestion. I believe we didn't change it because nobody seemed to care very much, but I have no objection to including it in the next release.
Thanks ralph On Nov 28, 2011, at 3:50 AM, Igor Geier wrote: > Dear all, > > there's been some discussions about this already, but the issue is still > there (in 1.4.4). When running SLURM jobs with the --cpus-per-task parameter > set (e.g. when running Open MPI-OpenMP jobs, so that --cpus-per-tasks > corresponds to the number of OpenMP threads per rank), you get the > > "All nodes which are allocated for this job are already filled." > > error, if SLURM_CPUS_PER_TASK > SLURM_TASKS_PER_NODE. In ras_slurm_module.c, > the number of slots is divided by the SLURM_CPUS_PER_TASK value (so that it > becomes 0). The following patch seems to work for our cluster: > > --- a/orte/mca/ras/slurm/ras_slurm_module.c 2009-12-08 21:36:38.000000000 > +0100 > +++ b/orte/mca/ras/slurm/ras_slurm_module.c 2011-11-25 12:28:55.000000000 > +0100 > @@ -353,7 +353,8 @@ > node->state = ORTE_NODE_STATE_UP; > node->slots_inuse = 0; > node->slots_max = 0; > - node->slots = slots[i] / cpus_per_task; > + /* Don't divide by cpus_per_task */ > + node->slots = slots[i]; > opal_list_append(nodelist, &node->super); > } > free(slots); > > Are there situations where this might not work? > > Best regards > > Igor > > -- > > Igor Geier > > -------------------------------------- > Center for Scientific Computing (CSC) > University of Frankfurt > Max-von-Laue-Straße 1 > 60438 Frankfurt am Main > +49(0)69/798-47353 > ge...@csc.uni-frankfurt.de > http://csc.uni-frankfurt.de/ > -------------------------------------- > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
