[petsc-dev] question about PETSc.Vec.sum()

[Jed Brown]

On Tue, Jun 21, 2011 at 18:56, Aron Ahmadia <aron.ahmadia at kaust.edu.sa>wrote:

> PETSc could also just provide a VecReduce and VecReduceStride operation,
> which might simplify the programming effort a bit.


That would be neat, especially if it used MPI_Op for the reduction. You
would need MPI-2.2 to have MPI_Reduce_local() for user-defined operations,
but it would be more flexible and less code than the current approach.
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