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Document Gadi MPI rank-placement performance for MatMult-dominated Stokes solves

documentationImprovements or additions to documentationImprovements or additions to documentation

questionFurther information is requestedFurther information is requested

Status: Open.

#635 In underworldcode/underworld3;

· gthyagi opened on Aug 23, 2026

Grad-div penalty breaks POINTWISE traction recovery (28% on dynamic topography); facet-integrated is fine

bugSomething isn't workingSomething isn't working

Status: Open.

#633 In underworldcode/underworld3;

· lmoresi opened on Aug 23, 2026

Geometric aggregation for placed-hierarchy FMG: coarse levels as decimated point clouds, not band-only meshes

Status: Open.

#629 In underworldcode/underworld3;

· lmoresi opened on Aug 21, 2026

3-D cut-in-band: author the slit into the thin-volume assembly (the carve-based mid-plane cut cannot work)

Status: Open.

#626 In underworldcode/underworld3;

· lmoresi opened on Aug 20, 2026

Stokes pressure sub-solve runs at its 200-iteration cap — the inner Schur solve is silently unconverged and dominates solve time

Status: Open.

#625 In underworldcode/underworld3;

· lmoresi opened on Aug 20, 2026

Stokes outer Krylov is PETSc-default gmres around fgmres inner solves — the flexible-outer rule applied to the sub-blocks but the outer was never set

Status: Open.

#624 In underworldcode/underworld3;

· lmoresi opened on Aug 20, 2026

place_sheet fill drifts the domain volume on steeply graded edge_split children

Status: Open.

#623 In underworldcode/underworld3;

· lmoresi opened on Aug 20, 2026

Custom-P V-cycles across a cut level cost more than they save (7x slower than GAMG at 11x fewer iterations)

Status: Open.

#622 In underworldcode/underworld3;

· lmoresi opened on Aug 20, 2026

Fault-network place route: h_far builds an 8x-denser far field than embed

Status: Open.

#621 In underworldcode/underworld3;

· lmoresi opened on Aug 20, 2026

cells_supporting returns an empty fault zone on a 3-D mesh

Status: Open.

#620 In underworldcode/underworld3;

· lmoresi opened on Aug 20, 2026

Rotated free slip on a FLAT wall does not reproduce the equivalent component Dirichlet condition (2e-3, and not a convergence artefact)

Status: Open.

#616 In underworldcode/underworld3;

· lmoresi opened on Aug 19, 2026

boundary_flux() returns ~1e12 on Stokes_Constrained

Status: Open.

#614 In underworldcode/underworld3;

· lmoresi opened on Aug 19, 2026