George is right -- Gilles: was this the correct solution? Put differently: the extent of the 20K vector created below is 4 (bytes).
> On Jan 19, 2015, at 2:39 AM, George Bosilca <bosi...@icl.utk.edu> wrote: > > Btw, > > MPI_Type_hvector(20000, 1, 0, MPI_INT, &type); > > Is just a weird datatype. Because the stride is 0, this datatype a memory > layout that includes 20000 times the same int. I'm not sure this was indeed > intended... > > George. > > > On Mon, Jan 19, 2015 at 12:17 AM, Gilles Gouaillardet > <gilles.gouaillar...@iferc.org> wrote: > Adrian, > > i just fixed this in the master > (https://github.com/open-mpi/ompi/commit/d14daf40d041f7a0a8e9d85b3bfd5eb570495fd2) > > the root cause is a corner case was not handled correctly : > > MPI_Type_hvector(20000, 1, 0, MPI_INT, &type); > > type has extent = 4 *but* size = 80000 > ob1 used to test only the extent to determine whether the message should > be sent inlined or not > extent <= 256 means try to send the message inline > that meant a fragment of size 80000 (which is greater than 65536 e.g. > max default size for IB) was allocated, > and that failed. > > now both extent and size are tested, so the message is not sent inline, > and it just works. > > Cheers, > > Gilles > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2015/01/16798.php > > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/devel > Link to this post: > http://www.open-mpi.org/community/lists/devel/2015/01/16801.php -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
