Jeff Squyres wrote:
This should probably include the disclaimer that we talked about this
extensively yesterday at the sm/btl meeting after the MPI Forum
meeting in San Jose.
Eugene has been working on new sm stuff (as he has posted), and we
had a very productive meeting yesterday discussing what he has done
and how to get it all into the trunk. Have a look at his slides at
the bottom of this wiki page:
https://svn.open-mpi.org/trac/ompi/wiki/Feb09Meetingsjc
Eugene will be replacing the current sm btl with a new one
Let's downgrade that statement. I intend to make a series of putbacks
to the current sm BTL to improve latency. I'm not so much "replacing"
the current BTL as doing some optimization work.
that uses a single queue and various other improvements. Hence, the
current ompi_*fifo.h files will no longer be necessary.
Additionally, we resolved the "abstraction break" issues that were
discussed here on the list a little while ago -- we think all the
improvements can be done in the current architecture without
disrupting the abstraction barriers. This RFC is one step in the
process; eliminate some no- longer-necessary kruft.
On Feb 12, 2009, at 8:53 AM, Eugene Loh wrote:
RFC: Eliminate ompi/class/ompi_[circular_buffer_]fifo.h
WHAT: Eliminate those two include files.
WHY: These include files are only used by the sm BTL. They
are not generally usable. Further, the sm BTL will soon no
longer use them. The current FIFOs support only a single sender
each and we want multiple senders to be able to share a common
FIFO. The current FIFOs also can grow without bound, which is
complicated support that we don't think we need.
WHERE: Two include files: ompi/class/ompi_[circular_buffer_]fifo.h
WHEN: "Immediately". Intended for 1.3.x.
TIMEOUT: February 20, 2009.
