* New "op" MPI layer framework
* Addition of the MPI_REDUCE_LOCAL proposed function (for MPI-2.2)
= Op framework =
Add new "op" framework in the ompi layer. This framework replaces the
hard-coded MPI_Op back-end functions for (MPI_Op, MPI_Datatype) tuples
for pre-defined MPI_Ops, allowing components and modules to provide
the back-end functions. The intent is that components can be written
to take advantage of hardware acceleration (GPU, FPGA, specialized CPU
instructions, etc.). Similar to other frameworks, components are
intended to be able to discover at run-time if they can be used, and
if so, elect themselves to be selected (or disqualify themselves from
selection if they cannot run). If specialized hardware is not
available, there is a default set of functions that will automatically
be used.
This framework is ''not'' used for user-defined MPI_Ops.
The new op framework is similar to the existing coll framework, in
that the final set of function pointers that are used on any given
intrinsic MPI_Op can be a mixed bag of function pointers, potentially
coming from multiple different op modules. This allows for hardware
that only supports some of the operations, not all of them (e.g., a
GPU that only supports single-precision operations).
All the hard-coded back-end MPI_Op functions for (MPI_Op,
MPI_Datatype) tuples still exist, but unlike coll, they're in the
framework base (vs. being in a separate "basic" component) and are
automatically used if no component is found at runtime that provides a
module with the necessary function pointers.
There is an "example" op component that will hopefully be useful to
those writing meaningful op components. It is currently
.ompi_ignore'd so that it doesn't impinge on other developers (it's
somewhat chatty in terms of opal_output() so that you can tell when
its functions have been invoked). See the README file in the example
op component directory. Developers of new op components are
encouraged to look at the following wiki pages:
https://svn.open-mpi.org/trac/ompi/wiki/devel/Autogenhttps://svn.open-mpi.org/trac/ompi/wiki/devel/CreateComponenthttps://svn.open-mpi.org/trac/ompi/wiki/devel/CreateFramework
= MPI_REDUCE_LOCAL =
Part of the MPI-2.2 proposal listed here:
https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/24
is to add a new function named MPI_REDUCE_LOCAL. It is very easy to
implement, so I added it (also because it makes testing the op
framework pretty easy -- you can do it in serial rather than via
parallel reductions). There's even a man page!
This commit was SVN r20280.
* If the accumulate is local, make it short-circuit the request path. Accumulate requires local
ops due to its window rules, so this is likely to help a bunch (on the codes I"m messing
with at least)
* Due a better job at flushing everything that can go out on the wire in a resource constrained problem
* Move some debugging values around to make large problems somewhat easier to deal with
This commit was SVN r20277.
and ::SEEK_SET (duh); that's why it's listed in constants.h. So put
that back and make it (static const int) rather than extern, and then
remove the instantiation from mpicxx.cc. Ditto for the other 2.
This commit was SVN r20251.
The following Trac tickets were found above:
Ticket 623 --> https://svn.open-mpi.org/trac/ompi/ticket/623
in mpicxx.h a while ago, but somehow accidentally left "extern const
int" for SEEK_SET (and friends) in constants.h. This commit removes
the extraneous "extern" versions.
This commit was SVN r20250.
The following Trac tickets were found above:
Ticket 623 --> https://svn.open-mpi.org/trac/ompi/ticket/623
The problem was eventually traced to two bugs in the code:
1. the orted wasn't resetting the write event flag, thus preventing itself from turning it on again.
2. the HNP needed to check if the stdin was attached to tty or not before adding the delay for fairness. If it is attached to a tty, there is no need for the delay. This prevents some strangely slow typing response.
This patch needs to move to 1.3
This commit was SVN r20246.
Error output strings were changed to be unique per code site.
They are still pretty meaningless to the user, but at least now
developers might be able to find which unique place in the code
reported which error.
This commit was SVN r20238.
to grow to. Without this change, jobs with np>120 get errors.
This does not change anything for np<16 jobs. It only comes into
play with larger np count on a node. I imagine that this can be
scaled back in the future if the usage of memory in the sm
btl is improved.
This fixes trac:1449.
This commit was SVN r20230.
The following Trac tickets were found above:
Ticket 1449 --> https://svn.open-mpi.org/trac/ompi/ticket/1449
Consolidate the nid/pid lookup code with the rest of the nid/pid code so that changes are easier to track. Add the ability to send cluster profile info as part of the nidmap. Cleanup the setup and teardown of the new global nidmap and pidmap objects.
This commit was SVN r20219.
