ClaudeandClaude Opus 5.5
b4eacf7526
- Hierarchy documents level/pair/shape/frame conventions; edge_frame(l) replaces the stepper's inline origin/spacing loop. - Public per-level read-only state: layouts, boundaries, jets, leaf. - set_jet_amplitude/read_raw_exchange/read_exchange_window: level= required. - remap_child(child_objects=) -> remap_finest(objects=). - _kernel_configs, _upload_boundary, _observed_boundary/_summarize split construction and observation duplication; behavior unchanged. - fine_level_origin -> fine_level_offset (a (y, x) index, not an origin). - docs: migration map in docs/development/src_coherence.md. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
3.6 KiB
Experimental projected G explosion
FixedPatchStepper(..., explosion="projected_linear") changes only the existing
G-to-G explosion reconstruction. The omitted/default "constant" selector retains
the same kernel, launch arguments and device allocations. Projected mode adds two
compact tables per adjacent pair; recursion, collision, BFL, restriction, buffer
ownership and synchronized publication are unchanged. remap_finest preserves it.
Runtime eligibility is periodic-root, fully blocked D2Q9/SRT/FP32, body/Jet-free, without LES; the fixed-patch backend has no forcing interface. Shifted and unshifted storage use the same reconstruction. One generic builder handles scalar windows, unique union rows and all adjacent hierarchy pairs without depth/rectangle caps. Donors are original explosion donors intersected with owned, uncovered ACTIVE cells. An axis uses centered differences only if both neighbors are legal; otherwise both addresses repeat the center. Nested layout periodicity is explicit. No covered cells, holes, inactive cells or stale halo copies enter the stencil.
The 33-line kernel is unchanged from our 519473a experiment and retains its
mathematical attribution. Host tests cover union decomposition, concavity, narrow
gaps, grazing packet paths, offsets, sparse/nested owner addresses, three/four-level
source timing, unchanged constant dispatch, remapping and shifted/unshifted actual
kernel arithmetic compiled as host C++. These are not CUDA or flow validation.
Reviewed bounded evidence
The 1aa8110 CUDA gate, with production exactly a135252, passed exact-dev
omitted/default and explicit-constant equivalence, per-population reconstruction,
scalar/union/four-level scheduling, alternate layouts, and changed remapping in
both storage modes. Operator maximum error was 2.98023224e-8; the eight-step
concave replay maximum was 1.58037614e-7. Whole-step mass/momentum remain
finite diagnostics, not an FP32 conservation certificate. Reviewed evidence:
7aa66ff0542175092753ea099f40b903ece0527e.
The fresh four-case 2cf9853 N128/256 Taylor–Green repeat retained all 11901a7
settings and gates. All 20 main scalar rows and 260 early-pressure samples matched
the older receipts exactly; this is not field-array equality. Projected worst
velocity was 0.001995299260844 versus 0.002 (only 0.235% margin), pressure
0.012157174904932 and energy 0.001184362645162. Constant velocity
0.004418076615223 failed its gate, so the aggregate verdict remains false.
The projected early sampled pressure peak was 0.021621453573334; it remains a
descriptive sampled maximum. Reviewed evidence: 90849a55cad4a0da9b72747da7bfe6eb75962a44.
The old N64 projected failures remain relevant. These results support only this bounded plumbing gate and short periodic Re100 smooth-decay experiment. They do not establish union/multilevel physics accuracy, convergence, long-time stability, body/Jet, boundary, forcing, MRT or LES suitability. Constant remains the default.
Separate LES source profile
The two older LES source manifests and the historical default are unchanged and
correctly reject this different source tree. The existing LES runner now offers
--experiment a135252, pinning all 101 actual committed corrected source files.
Its explicit baseline-header override describes only a synthetic isolated reverse
control, never the committed a135252 header. The unchanged corrected-only uniform
LES regression (Cs=0/.16/1) is the remaining integration gate; no LES result is
inherited from the projected evidence. The separate historical jet-CV channel.py
pin mismatch predates this port and is not addressed here.