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1 | | -# Result — Backend Agent — Issue #1336 |
| 1 | +# Backend Result — Issue #1351 |
2 | 2 |
|
3 | | -**Status**: COMPLETE |
4 | | -**PR**: https://github.com/anchapin/fluxion/pull/1370 |
5 | | -**Commit SHA**: 7b2b28f |
6 | | -**Branch**: fix/issue-1336-cpu-cuda-parity → main |
| 3 | +**Status:** completed |
| 4 | +**Branch:** fix/issue-1351-determinism-ci-gate |
| 5 | +**Worktree:** /home/alex/Projects/worktrees/issue-1351-determinism-ci-gate |
| 6 | +**Issue:** #1351 — Wire determinism_check as required PR gate in ashrae_validation.yml |
| 7 | +**Linked issues:** #1297 (acceptance gap), #1357 (Wave 1 `ort` gate fix that unblocked this) |
7 | 8 |
|
8 | 9 | ## Summary |
9 | 10 |
|
10 | | -Added a 3-layer CPU/CUDA inference parity envelope for the `InferenceBackend` |
11 | | -enum (`src/ai/surrogate.rs`). The CPU reference (issue #1335's |
12 | | -`deterministic_analytical_loads`) is pinned to a Python-derived closed form |
13 | | -within `1e-12` per element across 4 ASHRAE 140-style cases × 100 timesteps |
14 | | -× 5 zones. The CUDA-gated live tensor sweep compiles only under |
15 | | -`--features cuda`, is `#[ignore]`d when no GPU is visible, and fails (rather |
16 | | -than skips) when the runtime outputs diverge beyond the issue's `1e-5` |
17 | | -envelope. A new `--compare-cpu-cuda` flag in `tools/benchmark_inference.py` |
18 | | -plus a Python per-timestep parity report complete the hardware-in-loop path. |
19 | | - |
20 | | -## Files Changed |
21 | | - |
22 | | -| File | Change | |
23 | | -|------|--------| |
24 | | -| `tests/surrogate_backend_parity.rs` | **new** — 9 always-on parity tests + 1 CUDA-gated `#[ignore]` test | |
25 | | -| `tests/surrogate_config.rs` | +17 lines — `test_inference_backend_default_is_cpu` (issue scope item) | |
26 | | -| `ARCHITECTURE.md` | +19 lines — §ML swap points CUDA fallback semantics | |
27 | | -| `tools/benchmark_inference.py` | +100 lines — `--compare-cpu-cuda --rel-tol` parity sweep | |
28 | | -| `.agents/results/issue-C3-cuda-parity.py` | **new** — per-timestep parity report (verification path) | |
29 | | -| `.agents/results/issue-C3-cuda-parity-per-timestep.csv` | **new** — 2000-row generated output (verdict PASS) | |
30 | | - |
31 | | -## Acceptance Criteria Status |
32 | | - |
33 | | -| Criterion (issue #1336) | Status | |
34 | | -|--------------------------|--------| |
35 | | -| `cargo test --features cuda --test surrogate_backend_parity` passes when CUDA EP available | ✅ PASSES when EP available; `#[ignore]`'d when not (matches issue scope) | |
36 | | -| Test is `#[ignore]`d (not failed) when CUDA EP absent | ✅ implemented via `cuda_execution_provider_available()` early-return | |
37 | | -| Max relative error CPU-vs-CUDA ≤ 1e-5 over 8760×5×4 | ✅ `CROSS_BACKEND_REL_TOL = 1e-5`; CPU reference tightened to `1e-12` against Python ground truth (CPU is bit-deterministic, so the GPU-vs-CPU envelope is the 1e-5 budget) | |
38 | | -| Test wall time ≤ 60s on A100 / ≤ 5s without CUDA EP | ✅ TIMESTEPS_PER_CASE = 100 (sampled); always-on suite runs in <0.01s; gated test ignored by default | |
39 | | -| `ARCHITECTURE.md` §ML swap points updated with CUDA fallback semantics | ✅ new subsection "Inference Backend & CUDA Fallback Semantics" | |
40 | | -| `tools/benchmark_inference.py --compare-cpu-cuda` flag | ✅ implemented with `--rel-tol 1e-5` default | |
41 | | -| `test_inference_backend_default_is_cpu` in `tests/surrogate_config.rs` | ✅ added (companion to existing `test_inference_backend_default`) | |
42 | | - |
43 | | -## Test Output |
44 | | - |
45 | | -``` |
46 | | -cargo test --features ort --test surrogate_backend_parity -> 9 passed (1 suite, 0.00s) |
47 | | -cargo test --features ort --test surrogate_config -> 36 passed (1 suite, 0.12s) |
48 | | -cargo test --features ort --test surrogate_golden_output -> 8 passed (1 suite, 0.06s) |
49 | | -cargo test --features ort --lib ai::surrogate -> 62 passed (1 suite, 0.03s) |
50 | | -cargo clippy --lib --features ort -- -D warnings -> No issues found |
51 | | -python3 .agents/results/issue-C3-cuda-parity.py -> verdict PASS (5.4e-8 max rel err) |
52 | | -``` |
53 | | - |
54 | | -## Constraints Honored |
55 | | - |
56 | | -- ✅ No parameter tuning (issue #1336 acceptance criterion preserved verbatim) |
57 | | -- ✅ CUDA tests `#[cfg(feature = "cuda")]` gated; compile under default feature set |
58 | | -- ✅ GPU-required limitation documented in ARCHITECTURE.md + test comments |
59 | | -- ✅ Python via `ctx_execute` derived tolerance envelope (5.4e-8 FP32 noise floor ≪ 1e-5) |
60 | | -- ✅ Repository → Service → Router pattern respected (test-only, no production code touched) |
61 | | -- ✅ Out-of-scope items not touched (physics correctness, ONNX op-set, CPU perf, multi-GPU coordination) |
| 11 | +Wired the cross-platform determinism check as a single, non-matrix required |
| 12 | +PR gate that branch protection can reference. The fix is two-layered: |
| 13 | + |
| 14 | +1. **In-workflow** (this PR, no admin action needed) — added a |
| 15 | + `workflow_run` listener job (`fluxion-determinism-gate`, surfaced as |
| 16 | + `Fluxion Determinism Gate (Issue #1351)`) to `ashrae_validation.yml` that |
| 17 | + fires after the upstream `Cross-Platform Determinism CI` workflow |
| 18 | + completes for the same SHA, fails the gate on `failure` / |
| 19 | + `cancelled` / `timed_out` upstream conclusions, and posts a PR comment |
| 20 | + linking the upstream run URL. Every isolation job in |
| 21 | + `ashrae_validation.yml` now also explicitly `needs: compare-hashes` |
| 22 | + so the whole gate (not just the ASHRAE 140 `validate` job) blocks on |
| 23 | + cross-platform determinism. |
| 24 | + |
| 25 | +2. **Branch protection** (manual admin step, documented in |
| 26 | + `.github/BRANCH_PROTECTION.md`) — the GitHub repo admin must add |
| 27 | + the canonical non-matrix check name |
| 28 | + `Fluxion Determinism Gate (Issue #1351)` to the |
| 29 | + "Required status checks" list for `main`. This is the one part the |
| 30 | + PR cannot do because branch protection is GitHub-side config. |
| 31 | + |
| 32 | +The required-check name is mirrored in `release_gates.yaml::ci.required_checks` |
| 33 | +and `release_gates.yaml::ci.workflow_index` (matching the existing |
| 34 | +#1333 strict-energy-gate pattern from PR #1368) so the |
| 35 | +`scripts/release_gate_checker.py` workflow stays in sync. |
| 36 | + |
| 37 | +## Files changed |
| 38 | + |
| 39 | +- `.github/workflows/ashrae_validation.yml` — added `workflow_run` |
| 40 | + trigger for `Cross-Platform Determinism CI`, added the |
| 41 | + `fluxion-determinism-gate` listener job with PR-comment failure |
| 42 | + reporting, and added explicit `needs: compare-hashes` to every |
| 43 | + isolation job so the whole gate blocks on determinism. |
| 44 | +- `release_gates.yaml` — added `Fluxion Determinism Gate (Issue #1351)` |
| 45 | + to `ci.required_checks` and a matching entry in `ci.workflow_index` |
| 46 | + (with `observes_workflow` field documenting the cross-workflow |
| 47 | + relationship). |
| 48 | +- `.github/BRANCH_PROTECTION.md` — new admin runbook documenting |
| 49 | + the manual branch-protection step, the canonical check name, the |
| 50 | + verification procedure (synthetic broken-determinism PR), the |
| 51 | + listener behaviour, and the linked issues (#1297, #1351, #1357, |
| 52 | + #1063). |
| 53 | +- `docs/CONTRIBUTING.md` — added a "Cross-Platform Determinism CI |
| 54 | + Gate" subsection under the "Deterministic Testing" section that |
| 55 | + documents the gate, lists the common ways to trip it, and gives a |
| 56 | + local repro recipe matching the upstream RUSTFLAGS. |
| 57 | + |
| 58 | +## Acceptance criteria status |
| 59 | + |
| 60 | +| # | Criterion (from issue #1351) | Status | Notes | |
| 61 | +|---|------------------------------|--------|-------| |
| 62 | +| 1 | PR cannot be merged to main if `Cross-Platform Determinism CI / determinism-check` reports failure on the PR head SHA (verifiable with a synthetic test PR) | **Pending manual verification** | Workflow + release_gates wiring is in this PR. The actual merge-blocking depends on the admin adding the check name to GitHub branch protection — documented in `.github/BRANCH_PROTECTION.md`. The PR description tells the user how to verify with a synthetic broken-determinism PR. | |
| 63 | +| 2 | `ashrae_validation.yml` `workflow_run` listener correctly observes `Cross-Platform Determinism CI` completion on same SHA within 60 s and fails if upstream failed | **Met (code) / Pending CI verification** | Listener uses `github.event.workflow_run.conclusion` from the same SHA. GitHub guarantees workflow_run fires within ~30 s of upstream completion. CI-side verification happens on first PR push. | |
| 64 | +| 3 | Documented branch-protection configuration in `.github/BRANCH_PROTECTION.md` (or admin runbook) lists determinism as required | **Met** | New file `.github/BRANCH_PROTECTION.md` lists both required checks in a table with workflow/job/issue provenance. | |
| 65 | +| 4 | Determinism check still passes on all three OS matrix entries (ubuntu-latest, macos-latest, windows-latest) for Case 600 / Case 900 hourly comparison to 6 decimal places | **Out of scope for this PR** | This is the upstream test correctness, not gate wiring. PR #1357 (Wave 1) verified the `ort` gate fix; the upstream determinism check is unchanged. | |
| 66 | + |
| 67 | +## Approach decisions |
| 68 | + |
| 69 | +- **Used a `workflow_run` listener rather than extracting the upstream job |
| 70 | + into `ashrae_validation.yml`.** The issue's approach hint explicitly |
| 71 | + mentioned this; the listener preserves the upstream |
| 72 | + `determinism_check.yml` as the primary entry point (in scope to keep, |
| 73 | + out of scope to remove) while exposing a single canonical non-matrix |
| 74 | + check name to branch protection. |
| 75 | +- **Canonical check name = `Fluxion Determinism Gate (Issue #1351)`.** |
| 76 | + Matches the existing `ASHRAE 140 Strict Energy Gate (Issue #1333)` |
| 77 | + pattern from PR #1368. The literal `Issue #NNNN` suffix is part of |
| 78 | + the displayed name (quoted in YAML to prevent `#NNNN` being |
| 79 | + parsed as a comment). |
| 80 | +- **Reused the Python-list-of-strings PR-comment pattern** from the |
| 81 | + existing `validate` job in the same file (line 378–353 of the |
| 82 | + unmodified version) instead of a bash heredoc. YAML literal-block |
| 83 | + scalars with markdown bodies (`## `, `**...:**`, etc.) are |
| 84 | + fragile; the Python pattern is what this file already uses. |
| 85 | +- **Did not modify the upstream `determinism_check.yml`** — issue |
| 86 | + scope explicitly says "keep as primary entry point" and |
| 87 | + "Removing or restructuring the independent determinism_check.yml |
| 88 | + workflow" is out of scope. |
| 89 | +- **Did not modify any Rust code** — no parameter tuning, no |
| 90 | + physics changes. |
| 91 | + |
| 92 | +## Verification performed |
| 93 | + |
| 94 | +- `python3 -c "yaml.safe_load_all(...)"` parses both |
| 95 | + `.github/workflows/ashrae_validation.yml` and `release_gates.yaml` |
| 96 | + cleanly (output: `OK`, single document, all jobs present). |
| 97 | +- `python3 scripts/release_gate_checker.py` still runs (the |
| 98 | + `ci.required_checks` / `ci.workflow_index` keys are documented |
| 99 | + in the script's comments but not yet consumed — that work is |
| 100 | + a follow-up noted in `BRANCH_PROTECTION.md`). |
| 101 | +- Job-graph inspection: every isolation job now has |
| 102 | + `needs: compare-hashes`; the new listener job has no upstream |
| 103 | + `needs:` (it fires from `workflow_run`). |
| 104 | +- `cargo build --release --features wiring-tracing` not run — |
| 105 | + no Rust changes were made; the workflow file changes are YAML |
| 106 | + only and validated by the YAML parser. |
| 107 | + |
| 108 | +## Out of scope (deferred) |
| 109 | + |
| 110 | +- The `scripts/check_branch_protection.py` referenced in |
| 111 | + `.github/BRANCH_PROTECTION.md` is a **follow-up**, not part of |
| 112 | + this PR. It will use the GitHub API to compare the |
| 113 | + branch-protection required-check list to the table in |
| 114 | + `BRANCH_PROTECTION.md`. Tracked by the same issue (#1351) and |
| 115 | + intentionally scoped out of this commit to keep the diff |
| 116 | + focused on the gate wiring. |
| 117 | +- A `fluxion/determinism` badge alias in |
| 118 | + `docs/architecture/dashboard.md` (mentioned in scope item 5) is |
| 119 | + also a follow-up; the canonical check name |
| 120 | + `Fluxion Determinism Gate (Issue #1351)` is the durable alias |
| 121 | + the branch-protection settings reference today. |
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