openmpi

Nathan Hjelm 13643f5b6e btl/vader: improved single-copy support

This commit makes the folowing changes:

 - Add support for the knem single-copy mechanism. Initially vader will only
   support the synchronous copy mode. Asynchronous copy support may be added
   int the future.

 - Improve Linux cross memory attach (CMA) when using restrictive ptrace
   settings. This will allow Open MPI to use CMA without modifying the system
   settings to support ptrace attach (see /etc/sysctl.d/10-ptrace.conf).

 - Allow runtime selection of the single copy mechanism. The default behavior
   is to use the best available. The priority list of single-copy mehanisms is
   as follows: xpmem, cma, and knem.

 - Allow disabling support for kernel-assisted single copy.

 - Some tuning and bug fixes.

2014-10-20 11:44:52 -06:00

base

Cleanup some cruft resulting from the move of the btl's to opal. We had created the ability to delay modex operations, which included a need to delay retrieving hostname info for remote procs. This allowed us to not retrieve the modex info until first message unless required - the hostname is generally only required for debug and error messages.

2014-10-03 16:02:57 -06:00

openib

Mark all instances where atomic operations are used but their return value is unnecessary

2014-10-15 21:47:32 -04:00

portals4

Per the PMIx RFC:

2014-08-21 18:56:47 +00:00

scif

Per the PMIx RFC: