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sglang/.gitignore
laoyao0822 81eb138a26 Avoid CP HiCache owner-lane planning stalls during load-back
CP HiCache load-back eviction planning previously recomputed per-owner page counts from node token tensors while scanning evictable leaves. Under shared-KV pressure this can put scheduler-side planning onto an expensive tensor-padding path and stall before load_back can complete.

This stores per-CP-size owner page counts on CP HiCache metadata and uses that CPU metadata for backed/resident CP nodes. Streaming abort handling also accepts int-like status codes so abort responses do not crash on .name/.value access. Temporary debug runbooks remain ignored.

Unnecessary prefill hot-path timing logs were removed before commit; owner-lane eviction now keeps warning-level output for slow planning, insufficient eviction, or remaining deficits only.

Constraint: CP shared-KV cache residency is page-owner based and already records page owners in CpHiCacheNodeMetadata.
Rejected: Keep verbose prefill/owner-lane timing logs | they proved the issue but add hot-path noise after validation.
Confidence: medium
Scope-risk: moderate
Directive: Do not reintroduce tensor-derived owner counting on CP HiCache backed nodes without measuring scheduler CPU/GPU sync cost.
Tested: python -m py_compile python/sglang/srt/mem_cache/hiradix_cache.py python/sglang/srt/entrypoints/openai/serving_base.py python/sglang/srt/entrypoints/openai/serving_chat.py python/sglang/srt/entrypoints/openai/serving_completions.py test/registered/unit/mem_cache/test_cp_hicache_load_back_owner_lanes.py
Tested: git diff --check
Not-tested: Local pytest collection is blocked by missing starlette dependency.
Not-tested: Full ETE after log cleanup; previous pre-cleanup ETE replay reached 136098.82 prompt tok/s without killing prefill.
2026-06-09 06:55:39 +08:00

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