[petsc-users] generate entries on 'wrong' process

[Jed Brown]

On Fri, Jan 20, 2012 at 13:52, Wen Jiang <jiangwen84 at gmail.com> wrote:

> Could you cover it a bit more details why it will get deadlock unless the
> number of elements is *exactly* the same on every process?


MatAssemblyBegin/End are collective, so every process needs to call them
together.
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