Did you try running with -on_error_attach_debugger and and using your debugger to try to figure out where your code is segfaulting?
Max On Thu, Feb 23, 2012 at 10:07 AM, Bojan Niceno <bojan.niceno at psi.ch> wrote: > Thanks Ju. I studied this case carefully, and it seems clear to me. > When I apply the same techniques in my code, I get error messages I sent to > my reply to Matthew. > > > Cheers, > > > Bojan > > > > On 2/23/2012 6:46 PM, Ju LIU wrote: > > > > 2012/2/23 Bojan Niceno <bojan.niceno at psi.ch> > >> Hi all, >> >> I've never used a mailing list before, so I hope this message will reach >> PETSc users and experts and someone might be willing to help me. I am also >> novice in PETSc. >> >> I have developed an unstructured finite volume solver on top of PETSc >> libraries. In sequential, it works like a charm. For the parallel >> version, I do domain decomposition externally with Metis, and work out >> local and global numberings, as well as communication patterns between >> processor. (The latter don't seem to be needed for PETSc, though.) When I >> run my program in parallel, it also works, but I miss values in vectors' >> ghost points. >> >> I create vectors with command: VecCreate(PETSC_COMM_WORLD, &x); >> >> Is it possible to get the ghost values if a vector is created like this? >> >> I have tried to use VecCreateGhost, but for some reason which is beyond >> my comprehension, PETSc goes berserk when it reaches the command: >> VecCreateGhost(PETSC_COMM_WORLD, n, PETSC_DECIDE, nghost, ifrom, &x) >> >> Can anyone help me? Either how to reach ghost values for vector created >> by VecCreate, or how to use VecCreateGhost properly? >> >> > http://www.mcs.anl.gov/petsc/petsc-current/src/vec/vec/examples/tutorials/ex9.c.html > could be helpful. > > >> Bojan >> > > > > -- > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120223/f9528d25/attachment.htm> -------------- next part -------------- A non-text attachment was scrubbed... Name: not available Type: image/png Size: 6515 bytes Desc: not available URL: <http://lists.mcs.anl.gov/pipermail/petsc-users/attachments/20120223/f9528d25/attachment.png>
