Consolidates failure modes scattered across V2_DEEP_ANALYSIS,
E1_E2_RESULTS, E3_FINDINGS, KVC_EVICTION_GRANULARITY,
REAL_ALI_KVC_EXPERIMENT into a single lookup table with
five fields per mode: symptom → root cause → trigger →
current mitigation → real fix.
Five modes covered:
A. Mooncake "instance not alive" cascade
— E2 80%-failure pathology; admission no-space →
seed burst → heartbeat drop → batch abort
B. Cold-D / overlap-pinning
— shared boilerplate hash pins all sessions to a
subset of D's; load_floor_bonus is a patch, the
real fix is exclusive_overlap redefinition
C. Evict storm (session-level eviction)
— release_session frees 38–88K tokens in one shot;
fix is BLOCK_LEVEL_EVICTION_DESIGN
C'. Reseed storm (turn-1 concurrent seeds)
— startup-phase mooncake burst; fix is per-D
pending-seed budget, frequency drops after C
D. Streaming-session correction invariant crash (E3)
— schedule_batch.py:1646 landmine, hotfixed by
986f351, root-fix is removing the correction
path entirely (BLOCK_LEVEL_EVICTION §3.7)
Each mode has a forensic link back to the original
experiment doc that surfaced it.
§6 adds a diagnostic cheat sheet: "if you see X, look at Y."
§7 wires every mode to a roadmap item — Milestone 1 should
graduate §1–§4 to "mitigated" and eliminate §5.
INDEX_ZH gets a new §1.6 section linking this and the
SGLang patch inventory.
No code change. Reading dependency for anyone debugging
a sweep or writing paper §Limitations.
Gahow Wang
110bd68000