I was reading the FAQ list when I came across the following: http://www.mcs.anl.gov/petsc/documentation/faq.html#key
When calling MatPartitioningApply() you get a message Error! Key 16615 not found The graph of the matrix you are using is not symmetric. You must use symmetric matrices for partitioning. Is this a limitation on ParMetis side? I set up the adjacency matrix based on the discretization that I will be performing on the grid which is non-symmetric; both numerically and structurally. What's the solution here? Make an "approximate" adjacency matrix that sort of looks like (structurally) my discretization but is symmetric? What I don't understand is my matrix IS non-symmetric when the code runs on coarser grids! Also, I was reading the FAQ hoping I can find something regarding using gdb in parallel. I found this: http://scicomp.stackexchange.com/a/410/485 but I'm not sure how I should be using gdb in parallel. Could you (maybe Matt?) please explain a little bit? Thanks On Tue, Apr 10, 2012 at 12:08 AM, Mohammad Mirzadeh <mirzadeh at gmail.com>wrote: > Just built petsc-dev and it did not help. I'm going to look into the code > to see if my graph is "ill-formed" in some sense. Just hope the problem is > from my side not a real bug in ParMetis! > > > > On Mon, Apr 9, 2012 at 8:46 PM, Mohammad Mirzadeh <mirzadeh at > gmail.com>wrote: > >> ok. Thanks Jed. I'll try petsc-dev to see if it fixes the problem. >> >> Thanks everyone. >> >> >> On Mon, Apr 9, 2012 at 8:42 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote: >> >>> On Mon, Apr 9, 2012 at 22:37, Mohammad Mirzadeh <mirzadeh at >>> gmail.com>wrote: >>> >>>> Thanks Sean. I'm using Petsc 3.2-p6 along with ParMetis 4.0.2. Since >>>> this was not supported with 3.2-p6, and previous versions had bugs, I built >>>> parmetis myself and used --with-parmetis-include and --with-parmetis-lib >>>> flags to build petsc. >>>> >>>> Should I switch to petsc-dev? >>>> >>> >>> Yes, and use --download-metis --download-parmetis because the version >>> upstream has some bugs for which the patches have not been applied. >>> >> >> > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120411/3f5db597/attachment.htm>
