Dear list, I've gone through several hours of configuring and testing to get a grasp of the current status for multi-threading support.
I want to use a program with MPI_THREAD_MULTIPLE, over the openib BTL. I'm using openmpi-1.6.5 and SLC6 (rhel6), for what's worth. Upon configuring my own openmpi library, if I just --enable-mpi-thread-multiple, and execute my program with -mca btl openib, it simply crashes upon openib not supporting MPI_THREAD_MULTIPLE. I've only started testing with --enable-opal-multi-threads, just in case it would help me. Configuring with the aforementioned options, ./configure --enable-mpi-thread-multiple --enable-opal-multi-threads results in a crash whenever executing my program, $ mpirun -np 2 -mca mca_component_path /usr/mpi/gcc/openmpi-1.6.5/lib64/openmpi -mca btl openib -mca btl_openib_warn_default_gid_prefix 0 -mca btl_base_verbose 100 -mca btl_openib_verbose 100 -machinefile machinefile.labs `pwd`/em_bu_app 2>&1 | less -------------------------------------------------------------------------- It looks like opal_init failed for some reason; your parallel process is likely to abort. There are many reasons that a parallel process can fail during opal_init; some of which are due to configuration or environment problems. This failure appears to be an internal failure; here's some additional information (which may only be relevant to an Open MPI developer): opal_shmem_base_select failed --> Returned value -1 instead of OPAL_SUCCESS -------------------------------------------------------------------------- [lab14:13672] [[INVALID],INVALID] ORTE_ERROR_LOG: Error in file runtime/orte_init.c at line 79 [lab14:13672] [[INVALID],INVALID] ORTE_ERROR_LOG: Error in file orterun.c at line 694 Several questions related to these. Does --enable-opal-multi-threads have any impact on the BTL multi-threading support? (If there's more documentation on what this does I'd be glad to read it). Is there any additional configuration tag necessary for enabling opal-multi-threads to work? Cheers, thanks a lot! Daniel -- Daniel Hugo Cámpora Pérez European Organization for Nuclear Research (CERN) PH LBC, LHCb Online Fellow e-mail. dcamp...@cern.ch
