On 1/4/19, 3:37 PM, "Stogner, Roy H" <[email protected]> wrote:
On Thu, 3 Jan 2019, Salazar De Troya, Miguel via Libmesh-users wrote:
>> Running an example with 10 processors (works in serial) fails with the
error:
>One of our examples?
No. My own example so to speak. Sorry for the confusion.
>> !libmesh_assert_pass' failed
>>
>> The program stops at libmesh_assert(test_unflagged(true)) in
>> MeshRefinement::refine_and_coarsen_elements(). The remaining stack
>> trace when TotalView stops is as follows (sorry for the rudimentary
>> copy and paste, it’s all I can do now):
>>
>> MeshRefinement::test_unflagged (bool
libmesh_dbg_var(libmesh_assert_pass))
>> std::ostream & operator << (std::ostream & os, const Elem & e)
>> Elem::print_info (std::ostream & os)
>> std::string Elem::get_info ()
>> bool DofObject::valid_id () <-- Stops here.
>That's... baffling. At that point _coarsen_elements should have
>coarsened (and cleared flags of) anything flagged to coarsen, then
>_refine_elements should have refined (and cleared flags of) anything
>flagged to refine, then there should obviously be nothing left to
>coarsen or to refine.
>Hmm... the flag clearing in coarsening is actually done when the
>parents get coarsen() called. Is it possible that we're screwing up
>make_coarsening_compatible somewhere and leaving a child marked
>COARSEN without properly marking its parent COARSEN_INACTIVE?
I noticed there are two test_unflagged() in
MeshRefinement::refine_and_coarsen_elements(). It is the first one where the
problem is (where the condition (coarsening_changed_mesh ||
refining_changed_mesh) is met).
>> Please let me know if you need more details. I will keep investigating.
>There's no output from that print_info?
There is no more output.
I should apologize because the "stack trace" that I sent is not the one for
the processor that failed (I'm a newbie at TotalView). This is the one for the
processor that failed:
libmesh_assert(!libmesh_assert_pass); in MeshRefinement::test_unflagged (bool
libmesh_dbg_var(libmesh_assert_pass)) (mesh_refinement.C 467)
libMesh::write_traceout() in MacroFunctions::report_error()
libMesh::print_trace(traceout);
gdb_worked = gdb_backtrace(out_stream);
int fd = mkstemp(temp_file);
and then I see two frames with what looks assembly language from the file
libc.so.6
>I don't know what I can do about this unless I can reproduce it. I
>could suggest some asserts that might catch the hypothesis above.
Could you please suggest those assertions? Sending the code could be a bit
cumbersome.
Thanks
---
Roy
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