With Open MPI 5.0, the decision was made to stop building
3rd-party packages, such as Libevent, HWLOC, PMIx, and PRRTE as
MCA components and instead 1) start relying on external libraries
whenever possible and 2) Open MPI builds the 3rd party
libraries (if needed) as independent libraries, rather than
linked into libopen-pal.
This patch moves libevent from an MCA framework to a stand-alone
library built outside of OPAL. A wrapper in opal/util is provided
to minimize the unnecessary changes in the rest of the code. When
using the internal Libevent, it will be installed as a stand-alone
libevent.a, instead of bundled in OPAL. Any pre-installed version
of Libevent at or after 2.0.21 is preferred over the internal
version.
Signed-off-by: Brian Barrett <bbarrett@amazon.com>
This commit fixes a deadlock that can occur when using a TL that
supports the connect to endpoint model. The deadlock was occurring
while processing an incoming connection requests. This was done from
an active-message callback. For some unknown reason (at this time)
this callback was sometimes hanging. To avoid the issue the connection
active-message is saved for later processing.
At the same time I cleaned up the connection code to eliminate
duplicate messages when possible.
This commit also fixes some bugs in the active-message send path:
- Correctly set all fragment fields in prepare_src.
- Fix bug when using buffered-send. We were not reading the return
code correctly (which is in bytes). This resulted in a message
getting sent multiple times.
- Don't try to progress sends from the btl_send function when in an
active-message callback. It could lead to deep recursion and an
eventual crash if we get a trace like
send->progress->am_complete->ob1_callback->send->am_complete...
Closes#5820Closes#5821
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
This commit adds a new btl for one-sided and two-sided. This btl
uses the uct layer in OpenUCX. This btl makes use of multiple uct
contexts and per-thread device pinning to provide good performance
when using threads and osc/rdma. This btl has been tested extensively
with osc/rdma and passes all MTT tests on aries and IB hardware.
For now this new component disables itself but can be enabled by
setting the btl_ucx_transports MCA variable with a comma-delimited
list of supported memory domains/transport layers. For example:
--mca btl_uct_memory_domains ib/mlx5_0. The specific transports used
can be selected using --mca btl_uct_transports. The default is to use
any available transport.
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
