WHAT: Open our low-level communication infrastructure by moving all necessary components (btl/rcache/allocator/mpool) down in OPAL
All the components required for inter-process communications are currently deeply integrated in the OMPI layer. Several groups/institutions have express interest in having a more generic communication infrastructure, without all the OMPI layer dependencies. This communication layer should be made available at a different software level, available to all layers in the Open MPI software stack. As an example, our ORTE layer could replace the current OOB and instead use the BTL directly, gaining access to more reactive network interfaces than TCP. Similarly, external software libraries could take advantage of our highly optimized AM (active message) communication layer for their own purpose. UTK with support from Sandia, developped a version of Open MPI where the entire communication infrastucture has been moved down to OPAL (btl/rcache/allocator/mpool). Most of the moved components have been updated to match the new schema, with few exceptions (mainly BTLs where I have no way of compiling/testing them). Thus, the completion of this RFC is tied to being able to completing this move for all BTLs. For this we need help from the rest of the Open MPI community, especially those supporting some of the BTLs. A non-exhaustive list of BTLs that qualify here is: mx, portals4, scif, udapl, ugni, usnic.
This commit was SVN r32317.
new automake requires subdirs-object directive, to resolve this:
09:43:37 automake: warning: possible forward-incompatibility.
09:43:37 automake: At least a source file is in a subdirectory, but the 'subdir-objects'
09:43:37 automake: automake option hasn't been enabled. For now, the corresponding output
09:43:37 automake: object file(s) will be placed in the top-level directory. However,
09:43:37 automake: this behaviour will change in future Automake versions: they will
09:43:37 automake: unconditionally cause object files to be placed in the same subdirectory
09:43:37 automake: of the corresponding sources.
09:43:37 automake: You are advised to start using 'subdir-objects' option throughout your
09:43:37 automake: project, to avoid future incompatibilities.
09:43:37 tools/otfmerge/Makefile.common:13: warning: source file '$(OTFMERGESRCDIR)/otfmerge.c' is in a subdirectory,
09:43:37 tools/otfmerge/Makefile.common:13: but option 'subdir-objects' is disabled
cmr=v1.8.2:reviewer=ompi-rm1.8
This commit was SVN r32225.
this change the next time we update libevent.
cmr=v1.7.4:ticket=3882
This commit was SVN r29597.
The following Trac tickets were found above:
Ticket 3882 --> https://svn.open-mpi.org/trac/ompi/ticket/3882
