On Fri, May 29, 2015 at 3:56 PM, Jed Brown <[email protected]> wrote:
> Mark Adams <[email protected]> writes: > > Yea, I realized that VecAssembly should see this load imbalance unless it > > had a barrier before its timer. So I'm not sure what is going on. > > Since you don't have any outgoing entries, I think the huge > MPI_Allreduce is expensive. No surprise. > This is on Edison and this was not a problem a few months ago. Edison could have changed however.
