3e3f1b776b
Tiny extend requests can leave most CP lanes without query work, which has been tied to hangs and accept-length regressions. This change introduces a dual valid/compute metadata contract: forward paths may materialize compute-padded rows, while cache, current reuse, direct write, HiCache backup, and load remain valid/page based. The implementation keeps radix/HiCache/device allocation on real page extents, filters dummy compute rows before MLA/index cache writes and current reuse, makes top-k/index consume compute rows while compacting valid rows, and opens tiny CP shared-KV in-seq split through compute padding. The accompanying plan document records the contract and P1-P7 evidence. Constraint: CP shared KV and HiCache must stay page-granular; dummy compute rows must not allocate, write, backup, or load KV cache. Constraint: Avoid silent fallback and avoid adding collectives on hot paths. Rejected: Pad cache allocations to cp_size pages | would waste KV capacity and pollute radix/HiCache state. Rejected: Keep tiny suffixes out of CP split | preserves the zero-lane behavior that compute padding is meant to remove. Confidence: medium Scope-risk: broad Directive: Do not route compute-padded dummy rows into out_cache_loc, current reuse, HiCache reservation, or backup descriptors; keep valid/cache metadata explicit. Tested: Remote g0034 container targeted P7 tests: 3 passed, 3 warnings. Tested: Remote g0034 container full unit slice: PYTHONPATH=python python -m pytest -q test/registered/unit/layers/test_nsa_cp_utils.py test/registered/unit/mem_cache/test_cp_shared_kv_runtime.py test/registered/unit/mem_cache/test_cp_shared_kv_layout.py => 214 passed, 5 warnings, 2 subtests passed. Tested: Local py_compile for touched P7 test file. Not-tested: Latest CUDA/ETE traffic validation for dummy top-k rows, accept len, output len, and detokenizer hang behavior.
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.