PERF-2 P3-ii: the device V-cycle as the CG's preconditioner — poisson/device.rs (one CUDA runtime per process, persistent per-operator buffers, the mg_vcycle.cu kernels at K = 1; upload r, run the V-cycle, download z; the f64 CG unchanged), MultigridParameters::device, Prepared holds the device hierarchy, the CG driver destructures the prepared operator instead of cloning it; EmbeddedPisoSolver::set_poisson_device, overset pass-through, harness knob RTX_FSI2O_MG_DEVICE=1; export_levels factored out; the quarantine's dangling cfg attribute fixed

Co-Authored-By: Claude Fable 5.1 <[email protected]> Claude-Session: https://claude.ai/code/session_01YJPeT6WA2e7YvAnS875AHL
2026-09-16 01:16:55 -05:00
parent 3b7f8fb362
commit fc556f8a88
9 changed files with 410 additions and 20 deletions
@@ -301,6 +301,7 @@ impl EmbeddedPisoSolver {
                    precision: self.parameters.poisson_precision,
                    smoother: self.parameters.poisson_smoother,
                    threads: self.poisson_threads,
+                    device: self.poisson_device,
                    ..MultigridParameters::default()
                },
                inner_stop,