[petsc-users] Issue with window SF type using derived datatypes for reduction

[Lawrence Mitchell]

On 10 Feb 2015, at 01:31, Jed Brown <jed at jedbrown.org> wrote:

> Lawrence Mitchell <lawrence.mitchell at imperial.ac.uk> writes:
>> Having just tried a build with --download-mpich, I notice this problem
>> does not occur.  So should I shout at the OpenMPI team?
> 
> Open MPI has many long-standing bugs with one-sided and datatypes.  I
> have pleaded with them to error instead of corrupting memory or
> returning wrong results for unsupported cases.  My recommendation is to
> not use -sf_type window with Open MPI.
> 
> I hear that they have newfound interest in fixing the decade-old
> one-sided bugs, so I would say it is worth reporting this issue.

Thanks,

I'll have a go.
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