On Wed, May 30, 2012 at 9:37 AM, Hui Zhang <mike.hui.zhang at hotmail.com>wrote:
> How is the matrix assembled? > > In a deterministic way. > Do you use ADD_VALUES with off-process entries? If so, the message order may be different. You can also add -vecscatter_reproduce to make VecScatter with ADD_VALUES process the messages in a static order instead of in the order they arrive (somewhat slower). > How different? > > Not very much. The last residual can vary in its trailing digits, e.g. > from 6.5819e-7 to 6.5820e-7 > This looks fine. -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120530/6f700121/attachment.html>
