<div class="gmail_quote">On Fri, Jan 20, 2012 at 13:52, Wen Jiang <span dir="ltr"><<a href="mailto:jiangwen84@gmail.com">jiangwen84@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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?</blockquote></div><br><div>MatAssemblyBegin/End are collective, so every process needs to call them together.</div>