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idaholab / moose

Multiphysics Object Oriented Simulation Environment
https://www.mooseframework.org
GNU Lesser General Public License v2.1
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Two_circle_marker test is unreliable with distributed mesh on 7 or more processors #10776

Open permcody opened 6 years ago

permcody commented 6 years ago

Rationale

This test sets up up two circle markers to mark cells inside for refinement while coarsening those outside. It seems to be unstable on several processors but that's not surprising. There are many places for roundoff when combining circles with hexes and doing complex communication in parallel. It seems most reasonable to skip running these tests on higher parallel counts.

Description

Two circle marker diffs a little bit when running in parallel on distributed mesh with 7 or more processors.

Impact

Virtually none. Most of the test suite works fine in parallel on distributed mesh. We can evaluate this specific test if it is ever needed by an application with these specific conditions.

jessecarterMOOSE commented 6 years ago

I think I made that test to demonstrate a mesh numbering bug, so I didn't pay much attention to tolerances and such.