Hi Jed, 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? Thanks.
Regards, Wen Message: 5 Date: Fri, 20 Jan 2012 11:36:17 -0600 From: Jed Brown <[email protected]> Subject: Re: [petsc-users] generate entries on 'wrong' process To: PETSc users list <petsc-users at mcs.anl.gov> Message-ID: <CAM9tzSnQvEDOSTrHbbMZVOyOg2+yPA2zeYM-ouk1HGr09tE7hA at mail.gmail.com> Content-Type: text/plain; charset="utf-8" On Fri, Jan 20, 2012 at 11:31, Wen Jiang <jiangwen84 at gmail.com> wrote: > The serial job is running without any problems and never stalls. Actually > the parallel jobs also running successfully on distributed-memory desktop > or on single node of cluster. It will get stuck if it is running on more > than one compute node(now it is running on two nodes). Both the serial job > and parallel job (running on distributed or cluster) I mentioned before > have the same size(dofs). But If I ran a smaller job on cluster with two > nodes, it might not get stuck and work fine. > > As you said before, I add MAT_ASSEMBLY_FLUSH after every element stiffness > matrix is inserted. > This will deadlock unless the number of elements is *exactly* the same on every process. > I got the output like below, and it gets stuck too. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120120/3aad7efa/attachment.htm>
