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openmpi/ompi/mca/osc
George Bosilca e361bcb64c Send optimizations.
1. The send path get shorter. The BTL is allowed to return > 0 to specify that the
   descriptor was pushed to the networks, and that the memory attached to it is 
   available again for the upper layer. The MCA_BTL_DES_SEND_ALWAYS_CALLBACK flag
   can be used by the PML to force the BTL to always trigger the callback.
   Unmodified BTL will continue to work as expected, as they will return OMPI_SUCCESS
   which force the PML to have exactly the same behavior as before. Some BTLs have
   been modified: self, sm, tcp, mx.
2. Add send immediate interface to BTL.
   The idea is to have a mechanism of allowing the BTL to take advantage of
   send optimizations such as the ability to deliver data "inline". Some
   network APIs such as Portals allow data to be sent using a "thin" event
   without packing data into a memory descriptor. This interface change
   allows the BTL to use such capabilities and allows for other optimizations
   in the future. All existing BTLs except for Portals and sm have this interface
   set to NULL.

This commit was SVN r18551.
2008-05-30 03:58:39 +00:00
..
base This commit represents a bunch of work on a Mercurial side branch. As 2008-05-13 20:00:55 +00:00
pt2pt This commit represents a bunch of work on a Mercurial side branch. As 2008-05-13 20:00:55 +00:00
rdma Send optimizations. 2008-05-30 03:58:39 +00:00
Makefile.am * Fix "make dist" for peruse 2006-03-23 23:41:49 +00:00
osc.h add a couple of comments, clean up the organization a bit 2007-07-18 22:56:33 +00:00