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openmpi/ompi/runtime
Ralph Castain 6166278e18 Improve the scalability of the modex operation and fix a bug reported by Tim P
The bug was a race condition in the barrier operation that caused the barrier in MPI_Finalize to fail on very short programs.

Scalaiblity was improved by using the daemons to aggregate modex and barrier messages before sending them to the rank=0 proc. Improvement is proportional to ppn, of course, but there really wasn't a scaling problem at low ppn anyway. This modification also paves the way for better allgather operations since now all the data for each node is sitting at the daemon level, and the daemons are now aware that a collective operation on the OOB is underway (so they -can- participate in a collective of their own to support it).

Also added better diagnostics to map out the timing associated with MPI_Init - turned on by -mca orte_timing 1.

This commit was SVN r17988.
2008-03-27 15:17:53 +00:00
..
help-mpi-runtime.txt Merging in the Sparse Groups.. 2007-08-04 00:41:26 +00:00
Makefile.am Move modex from pml base to general ompi runtime, sicne it's used by more 2007-07-09 17:16:34 +00:00
mpiruntime.h Present state of MPI debugger work: 2008-03-05 12:22:34 +00:00
ompi_cr.c Remove the obsolete and largely unused orte_system_info structure. The only fields that were used in that struct were nodeid and nodename - these have been transferred to the orte_process_info structure. 2008-03-23 23:10:15 +00:00
ompi_cr.h Closes trac:977 2007-04-14 02:06:05 +00:00
ompi_module_exchange.c Merge the ORTE devel branch into the main trunk. Details of what this means will be circulated separately. 2008-02-28 01:57:57 +00:00
ompi_module_exchange.h Merge the ORTE devel branch into the main trunk. Details of what this means will be circulated separately. 2008-02-28 01:57:57 +00:00
ompi_mpi_abort.c Ensure to cover all cases when either ORTE or OMPI is not yet 2008-03-24 16:25:14 +00:00
ompi_mpi_finalize.c Move carto open/close/finalize to opal layer so that ORTE can get access to topo info. This will be used to support a topo grpcomm that optimizes communications in non-uniform topologies like RR. 2008-02-28 21:04:30 +00:00
ompi_mpi_init.c Improve the scalability of the modex operation and fix a bug reported by Tim P 2008-03-27 15:17:53 +00:00
ompi_mpi_params.c Support for new RMAPS rank mapping component 2008-03-18 09:39:07 +00:00
ompi_mpi_preconnect.c Merge the ORTE devel branch into the main trunk. Details of what this means will be circulated separately. 2008-02-28 01:57:57 +00:00
params.h Support for new RMAPS rank mapping component 2008-03-18 09:39:07 +00:00