One Distribution, Two Channels: Coverage-Calibrated KV Retention and Compensation
Long-context decoding is increasingly constrained by key--value (KV) cache memory and bandwidth. Existing fixed-budget compression methods typically separate retention from compensation, while a retention ranking specifies neither discarded attention mass nor the direction of induced output error. We start from an exact factorization: eviction error equals evicted attention mass times the directional gap between the evicted centroid and retained output, highlighting the importance of set-level coverage in retention and mass-preserving memory writing. We introduce CORE COverage Calibration and Evicted-Mass REdistribution for KV Cache, which distills an offline allocation combining query ut...
| Authors | Shuxin Liu, Qing Liu, Yi Du et al. |
|---|---|
| Primary category | cs.AR |
| Published | 28 September 2026 |
| Last updated at source | 10 October 2026 |
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