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openmpi/orte/mca/odls/default
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
..
configure.m4 Here is the major MAD-cure commit. I have written plenty about it, so I refer you here to those messages for a description of everything that was done. 2006-09-14 21:29:51 +00:00
configure.params Remove unneeded PARAM_INIT_FILE variable in configure.params files used by 2007-01-08 03:44:22 +00:00
help-odls-default.txt These changes were mostly captured in a prior RFC (except for #2 below) and are aimed specifically at improving startup performance and setting up the remaining modifications described in that RFC. 2007-10-05 19:48:23 +00:00
Makefile.am Per long threads on the mailing list and much confusion discussion 2007-12-15 13:32:02 +00:00
odls_default_component.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
odls_default_module.c Improve the scalability of the modex operation and fix a bug reported by Tim P 2008-03-27 15:17:53 +00:00
odls_default.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