- rename ompi_coll_base_reduce_scatter_block_basic to
more self descriptive ompi_coll_base_reduce_scatter_block_basic_linear
- fix the description of the coll_tuned_reduce_scatter_block_algorithm
MCA param
this fixes and documents previous open-mpi/ompi@0e8b35b615
MPI_Reduce_scatter_block used to be implemented by the coll/basic module only.
A new algo (recursive doubling) was recently introduced and can be used via the coll/tuned module,
but we never intended to make it the default algo.
In order to "restore" the previous default, the initial algo was moved from coll/basic to coll/base,
and is now used by default by coll/tuned.
Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>
The files array was also storing $phase.prof. This was leading to
$phase.prof's output getting dumped into itself again and again. Updated
code to initialise files array with files other than $phase.prof.
Signed-off-by: Ninad Prabhukhanolkar <ninadchess96@gmail.com>
keep track of the sizeof the blocklen_per_process and displs_per_process
on the aggregator datastructure to minimze the number of realloc function
calls required in the shuffle_init operation.
Signed-off-by: raafatfeki <fekiraafat@gmail.com>
This commit attempts to update the romio io component to not use
functions removed in MPI-3.0 (2012). This is a first cut and will
probably need to be reviewed for correctness.
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
romio assumes that all predefined datatypes are contiguous. Because of
the (terribly named) composed datatypes MPI_SHORT_INT, MPI_DOUBLE_INT,
MPI_LONG_INT, etc this is an incorrect assumption. The simplest way to
fix this is to override the MPI_Type_get_envelope and
MPI_Type_get_contents calls with calls that will work on these
datatypes. Note that not all calls to these MPI functions are
replaced, only the ones used when flattening a non-contiguous
datatype.
References #5009
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
This commit fixes a segfault in mtl-portals4 finalize(). The segfault
occurs if finalize() is called without any calls to add_procs(). This
commit resolves the segfault by skipping the progress() loop in
finalize() if the Portals was not initialized.
Signed-off-by: Todd Kordenbrock (thkgcode@gmail.com)
the ompio module resets the amode from WRONLY to RDWR in order
to accoomodate data sieving in the two-phase fcoll componet. This
leads however to an error if MPI_MODE_SEQUENTIAL has been requested
by the user, since MODE_SEQUENTIAL is incompatible with MODE_RDWR.
SInce the change to the amode was done after opening the file for
individual file pointers but before opening the file for shared filepointers,
this lead to an error message in the sharedfp component.
Note, that data sieving is never necessary if MODE_SEQUENTIAL is set,
so this should not be a problem for any scenario.
Fixes#4991
Signed-off-by: Edgar Gabriel <egabriel@central.uh.edu>
instead of using a temporary buffer and copy data into the temp buffer before sending, use a derived datatype to describe the data that needs to be sent during a cycle in the collective I/O operation.
Signed-off-by: raafatfeki <fekiraafat@gmail.com>
Implements recursive doubling algorithm for MPI_Scan and MPI_Exscan.
The algorithm preserves order of operations so it can be used both
by commutative and non-commutative operations.
Signed-off-by: Mikhail Kurnosov <mkurnosov@gmail.com>
This commit fixes a bug is osc/rdma that can occur if the total size
of the shared memory segment gets larger than 4 GiB. The bug was
caused by a typo. The type of my_base_offset should have been size_t
not int.
Signed-off-by: Nathan Hjelm <hjelmn@lanl.gov>
This will almost certainly never happen, but be defensive and
guarantee that we never return an uninitialized variable.
Signed-off-by: Jeff Squyres <jsquyres@cisco.com>
