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.
Use exising fields of mkey struct to identify 'shared memory'
segments.
mkey.u.key is now always initialized to MAP_SEGMENT_SHM_INVALID instead
of 0
reviewed by Mike and Igor
cmr=v1.8.2:reviewer=ompi-rm1.8
This commit was SVN r32174.
check for possibility of heap2heap copy was incorrect
in case when shared heaps have different virtual
addresses on same host.
It seems that ibv_exp_reg_mr() on CIB cards may return
different VAs for heap on same node. On CX3 addresses are
the same.
reviewed by miked
cmr=v1.8.2:reviewer=ompi-rm1.8
This commit was SVN r31969.
new OFED changed struct layout and static assignment caused segv.
detect struct new layout and use dynamic assignment
fixed by AlexM, reviewed by Miked
cmr=v1.8.2:reviewer=ompi-rm1.8
This commit was SVN r31502.
Use only contig allocator if shared_mr() is not supported
Fixes ibv_exp_reg_mr() parameters passing.
Fixes incorrect handling of sshmem_verbs_hca_name option.
fixed by AlexM, reviewed by Mike
cmr=v1.8.1:reviewer=ompi-rm1.8
This commit was SVN r31379.
set default memheap start address to use one returned from memallocator
on 32bit system kernel may have issue because of this:
CONFIG_STRICT_DEVMEM kernel option which "prevents user space access to physical memory above 1MB"
fixed by Roman, reviewed by Igor/Miked
cmr=v1.8.1:reviewer=ompi-rm1.8
This commit was SVN r31331.
Provide users with right fail reason.
fixes trac:4433
This commit was SVN r31202.
The following Trac tickets were found above:
Ticket 4433 --> https://svn.open-mpi.org/trac/ompi/ticket/4433
Refs trac:4399
fixed by Roman, reviewed by Miked
cmr=v1.7.5:reviewer=ompi-rm1.7
This commit was SVN r31179.
The following Trac tickets were found above:
Ticket 4399 --> https://svn.open-mpi.org/trac/ompi/ticket/4399
* Show the help message for all errors, not just EINVAL
* Put the help message in the correct helpfile
* Fix grammar and spelling, and expand the help message
cmr=v1.7.5:ticket=trac:4431
This commit was SVN r31173.
The following SVN revision numbers were found above:
r31172 --> open-mpi/ompi@3e51d28b97
The following Trac tickets were found above:
Ticket 4431 --> https://svn.open-mpi.org/trac/ompi/ticket/4431
Using MAP_ANONYMOUS brings different interpretation of fd, offset arguuments of mmap()
Linux:
The mapping is not backed by any file; the fd and offset arguments are ignored.
Mac:
Map anonymous memory not associated with any specific file. The offset argument is
ignored. Mac OS X specific: the file descriptor used for creating MAP_ANON regions
can be used to pass some Mach VM flags, and can be specified as -1 if no such flags
are associated with the region
FreeBSD:
Map anonymous memory not associated with any specific file. The file
descriptor used for creating MAP_ANON must be -1. The offset argument must be 0.
fixed by Igor, reviewed by Mike
Refs trac:4399
cmr=v1.7.5:reviewer=ompi-rm1.7
This commit was SVN r31140.
The following Trac tickets were found above:
Ticket 4399 --> https://svn.open-mpi.org/trac/ompi/ticket/4399
- similar to opal/shmem
- next step is some refactoring and merge into opal/shmem
Developed by Igor, reviewed by AlexM, MikeD
This commit fixes trac:4261.
This commit was SVN r30855.
The following Trac tickets were found above:
Ticket 4261 --> https://svn.open-mpi.org/trac/ompi/ticket/4261
