[petsc-dev] synchronized printing, singletons, and jumbled GAMG/BJacobi output
Barry Smith
bsmith at mcs.anl.gov
Sat May 25 20:17:04 CDT 2013
On May 25, 2013, at 7:22 PM, Jed Brown <jedbrown at mcs.anl.gov> wrote:
> Barry Smith <bsmith at mcs.anl.gov> writes:
>
>> It would be confusing if it only prints rank 0 when the others are
>> also interesting. I suggest it gather statistics from all the
>> processes and print a summary.
>
> How should it summarize? (There are so many things that could be
> different.) Would it be okay to say "Subdomain solver on other
> processes, use -mg_coarse_pc_bjacobi_view_all_subdomains for details"?
>
> What should we do with 3.4? -ksp_view is currently unusable when run
> with -pc_type gamg, especially on more than a handful of processes.
Why is gamg using bjacobi as the course solver? And why does it have different solvers on each process? Seems more a problem with GAMG then with viewing.
Barry
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