Thanks for your response. Sorry about that, to reduce the size of the log file, unfortunetly, I did took out the bad lines... In the out.log I've put in this email, I've make sure there are...
Actually, I don't use MatSetOption, but MatSetFromOption instead. However, when I called MatSetFromOption, the PETSC_COMM_WORLD was missing. But now, it's getting worse !! (as you could see in the out.log included in this email). Le 23 novembre 2011 15:55, Jed Brown <jedbrown at mcs.anl.gov> a ?crit : > On Wed, Nov 23, 2011 at 08:24, jean-frederic thebault < > jean-frederic at thebault-net.com> wrote: > >> I'm wondering what's wrong in my code. I'm using PETSc to solve a linear >> system, and willing to use a multi-processor computer. 9 years ago, I used >> petsc-2.1.3 with success. Few weeks ago, I've update petsc with the 3.1-p8 >> version and made the necessary changes to work with. No problem. And >> recently, I've migrate to petsc-3.2-p5. Compilation is OK. But when I do >> simulation, now, I have some PETSC-ERROR in the log file, even using only >> one processor (see the out.log file in this email). >> > > You are calling MatSetOption() with the wrong number of arguments. C > compilers tell you about this, but Fortran compilers do not. > > > http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Mat/MatSetOption.html > > >> However, I think I defined MatMPI and VecMPI correctly, according to the >> doc. The log file tell that something wrong with the nnz which should not >> be greater than row length (??). >> > > The log you sent does not say anything about nnz. Fix the call to > MatSetOption(). > > And also, with the previous version of PETSc I've used, the were no >> problem using -pc_type bjacobi and -sub_pc_type sor, juste to solve linear >> system doing parallel computations and because SOR is not parallelized. But >> now, when I use -pc_type bjacobi and -sub_pc_type sor, with 3 rank, I >> experiment some convergence problem during my simulation. >> > > These options should do the same thing they used to do. Make sure you are > assembling correctly. If it's still confusing, run the old and new code with > > -ksp_monitor_true_residual -ksp_converged_reason -ksp_view -pc_type > bjacobi -sub_pc_type sor > > and send the output of both for us to look at. > > Also note that you can use -pc_type sor even in parallel. There are > options for local iterations and full iterations. > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20111123/c70300f3/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: out.log Type: application/octet-stream Size: 5513 bytes Desc: not available URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20111123/c70300f3/attachment.obj>
