Hi, On May 19, 2011, at 9:37 AM, Robert Horton wrote
> On Thu, 2011-05-19 at 08:27 -0600, Samuel K. Gutierrez wrote: >> Hi, >> >> Try the following QP parameters that only use shared receive queues. >> >> -mca btl_openib_receive_queues S,12288,128,64,32:S,65536,128,64,32 >> > > Thanks for that. If I run the job over 2 x 48 cores it now works and the > performance seems reasonable (I need to do some more tuning) but when I > go up to 4 x 48 cores I'm getting the same problem: > > [compute-1-7.local][[14383,1],86][../../../../../ompi/mca/btl/openib/connect/btl_openib_connect_oob.c:464:qp_create_one] > error creating qp errno says Cannot allocate memory > [compute-1-7.local:18106] *** An error occurred in MPI_Isend > [compute-1-7.local:18106] *** on communicator MPI_COMM_WORLD > [compute-1-7.local:18106] *** MPI_ERR_OTHER: known error not in list > [compute-1-7.local:18106] *** MPI_ERRORS_ARE_FATAL (your MPI job will now > abort) > > Any thoughts? How much memory does each node have? Does this happen at startup? Try adding: -mca btl_openib_cpc_include rdmacm I'm not sure if your version of OFED supports this feature, but maybe using XRC may help. I **think** other tweaks are needed to get this going, but I'm not familiar with the details. Hope that helps, Samuel K. Gutierrez Los Alamos National Laboratory > > Thanks, > Rob > -- > Robert Horton > System Administrator (Research Support) - School of Mathematical Sciences > Queen Mary, University of London > r.hor...@qmul.ac.uk - +44 (0) 20 7882 7345 > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
