PERF-2: red-black symmetric Gauss–Seidel smoother behind a knob (MgSmoother::RedBlack; default lexicographic = the recorded regime, bit-identical) — red/black cell lists per level, the symmetric pair red,black,black,red, the operator cache keyed on the smoother; EmbeddedParameters::poisson_smoother, harness knobs RTX_FSI2O_MG_RB (overset) and RTX_FSI2_MG_RB (embedded, the noise probe); pin: solves the masked problem to the same stop, agrees with lexicographic to 2e-12, cached = uncached bit for bit

Co-Authored-By: Claude Fable 5.1 <[email protected]> Claude-Session: https://claude.ai/code/session_01YJPeT6WA2e7YvAnS875AHL
2026-09-15 23:48:55 -05:00
parent 26904e37d8
commit cb5771fa71
7 changed files with 208 additions and 5 deletions
@@ -65,8 +65,8 @@ pub use piso::{PisoParameters, PisoResult, PisoSolver};
 #[cfg(feature = "cuda")]
 pub use piso_gpu::PisoGpuSolver;
 pub use poisson::{
-    MgPrecision, MultigridParameters, PcgCache, PoissonProblem, PoissonSolution, PoissonSolverKind,
-    solve_multigrid_pcg, solve_multigrid_pcg_cached,
+    MgPrecision, MgSmoother, MultigridParameters, PcgCache, PoissonProblem, PoissonSolution,
+    PoissonSolverKind, solve_multigrid_pcg, solve_multigrid_pcg_cached,
 };
 pub use polygon_sdf::PolygonSdf;
 pub use simple::{ConvectionScheme, SimpleParameters, SimpleResult, SimpleSolver};