Re: [OMPI devel] coll/tuned MPI_Bcast can crash or silently fail when using distinct datatypes across tasks

Any update on this? Can it be used in the RMA part? George. On Wed, Apr 23, 2014 at 1:58 AM, Gilles Gouaillardet wrote: > my bad :-( > > this has just been fixed > > Gilles > > On 2014/04/23 14:55, Nathan Hjelm wrote: >> The ompi_datatype_flatten.c file appears

Re: [OMPI devel] coll/tuned MPI_Bcast can crash or silently fail when using distinct datatypes across tasks

my bad :-( this has just been fixed Gilles On 2014/04/23 14:55, Nathan Hjelm wrote: > The ompi_datatype_flatten.c file appears to be missing. Let me know once > it is committed and I will take a look. I will see if I can write the > RMA code using it over the next week or so. >

Re: [OMPI devel] coll/tuned MPI_Bcast can crash or silently fail when using distinct datatypes across tasks

The ompi_datatype_flatten.c file appears to be missing. Let me know once it is committed and I will take a look. I will see if I can write the RMA code using it over the next week or so. -Nathan On Wed, Apr 23, 2014 at 02:43:12PM +0900, Gilles Gouaillardet wrote: > Nathan, > > i uploaded this

Re: [OMPI devel] coll/tuned MPI_Bcast can crash or silently fail when using distinct datatypes across tasks

George, i am sorry i cannot see how flatten datatype can be helpful here :-( in this example, the master must broadcast a long vector. this datatype is contiguous so the flatten'ed datatype *is* the type provided by the MPI application. how would pipelining happen in this case (e.g. who has to

Re: [OMPI devel] coll/tuned MPI_Bcast can crash or silently fail when using distinct datatypes across tasks

Nathan, i uploaded this part to github : https://github.com/ggouaillardet/ompi-svn-mirror/tree/flatten-datatype you really need to check the last commit : https://github.com/ggouaillardet/ompi-svn-mirror/commit/a8d014c6f144fa5732bdd25f8b6b05b07ea8 please consider this as experimental and

Re: [OMPI devel] coll/tuned MPI_Bcast can crash or silently fail when using distinct datatypes across tasks

21, 2014 9:04 PM To: Open MPI Developers Subject: Re: [OMPI devel] coll/tuned MPI_Bcast can crash or silently fail when using distinct datatypes across tasks Indeed there are many potential solutions, but all require too much intervention on the code to be generic enough. As we discussed privately

Re: [OMPI devel] coll/tuned MPI_Bcast can crash or silently fail when using distinct datatypes across tasks

Indeed there are many potential solutions, but all require too much intervention on the code to be generic enough. As we discussed privately mid last year, the "flatten datatype" approach seems to me to be the most profitable.It is simple to implement and it is also generic, a simple change will

[OMPI devel] coll/tuned MPI_Bcast can crash or silently fail when using distinct datatypes across tasks

Dear OpenMPI developers, i just created #4531 in order to track this issue : https://svn.open-mpi.org/trac/ompi/ticket/4531 Basically, the coll/tuned implementation of MPI_Bcast does not work when two tasks uses datatypes of different sizes. for example, if the root send two large vectors of