<div class="gmail_quote">On Wed, Jul 13, 2011 at 15:08, Clemens Domanig <span dir="ltr"><<a href="mailto:clemens.domanig@uibk.ac.at">clemens.domanig@uibk.ac.at</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div id=":ie">The program uses MPI for parallel solving (LU, mumps).<br>
It works fine with all examples that have onyl 5 dof per node and that have a mixture of 5 and 6 dof per node.<br>
When doing examples that have 6 dof per node this happens:<br>
* when using more than 2 MPI processes everything seems to be fine.<br>
* when using 1 or 2 MPI processes MatAssemblyBegin() never finishes</div></blockquote></div><br><div>It just hangs? Can you attach a debugger and get a stack trace?</div><div><br></div><div>$ gdb -p PID</div><div>[output from attaching]</div>
<div>(gdb) bt full</div><div>[send this output]</div>