c9f790cde9
Mixed prefix/current MLA reuse depends on the page-slot prefetch compose path to preserve padded tail semantics. The compact materialize/current merge path can re-expose suffix slack as valid dense rows, so the backend now raises with an explicit fail-fast marker instead of silently falling back. Constraint: Page-aligned CP shared KV contract requires suffix tail slack to remain invalid. Rejected: Keep compact merge as a fallback | it has a different dense-row contract and can hide correctness bugs. Confidence: high Scope-risk: moderate Directive: Do not reintroduce merge_materialized_and_current_kv on MLA partial-current reuse without a page-slot correctness proof. Tested: Remote py_compile for nsa_backend.py and test_nsa_cp_utils.py in g0034 container. Tested: Remote pytest test_nsa_cp_utils.py::TestNSAInSeqCPUtils::test_mla_partial_current_path_fails_fast_instead_of_compact_fallback. Tested: Remote pytest test_nsa_cp_utils.py test_cp_shared_kv_layout.py test_cp_shared_kv_runtime.py: 124 passed, 5 warnings. Not-tested: Live ETE traffic and CUDA kernel execution for this fail-fast path. Co-authored-by: OmX <omx@oh-my-codex.dev>
Registered Tests
Tests under this directory are auto-discovered by run_suite.py via CI registration decorators.
Where Should I Put My New Test?
No server / engine launch required
| What you're testing | Directory | Requires |
|---|---|---|
| Component logic in isolation (cache, scheduler, config, parser, etc.) | unit/<module>/ |
CPU or GPU |
| CUDA kernel correctness | kernels/ |
GPU |
Server / engine launch required (E2E)
| What you're testing | Directory | Requires |
|---|---|---|
| Model inference correctness | models/, 4-gpu-models/, 8-gpu-models/ |
GPU |
| Feature-specific (OpenAI API, LoRA, speculative, distributed, VLM, etc.) | openai_server/, lora/, spec/, distributed/, ... |
GPU |
| Benchmarks (performance, accuracy, stress) | benchmark/ |
GPU |
| Platform-specific | amd/, ascend/ |
Vendor GPU |
See unit/README.md for unit test conventions.