[petsc-users] MatTransposeMatMult ends up with an MPI error

[Jed Brown]

On Wed, Oct 17, 2012 at 10:50 AM, Hong Zhang <hzhang at mcs.anl.gov> wrote:

> Lately, we added a new implementation of MatTransposeMatMult() in petsc-dev
> which is shown much faster than released MatTransposeMatMult().
> You might give it a try by
> 1. install petsc-dev (see
> http://www.mcs.anl.gov/petsc/developers/index.html)
> 2. run your code with option '-mattransposematmult_viamatmatmult 1'
> Let us know what you get.
>

For the time-being, this will only work with non-broken MPI datatypes.

https://svn.open-mpi.org/trac/ompi/ticket/2656
https://svn.open-mpi.org/trac/ompi/ticket/1905
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