VR2R-0223
① SA Source
- Source: 開啟完整 SA 文章
- Section:
BlueField-4 - Line hint:
194
Context Before
As long-context inference pushes context windows toward millions of tokens and agentic concurrency scales across users and services, the current memory hierarchy used to store KVcache begins to look insufficient.
Evidence
KV cache grows linearly with sequence length and multiplicatively with workload parallelism, quickly expanding beyond what any single tier of memory was designed to hold.
Context After
GPU HBM, while unmatched in bandwidth and latency, is not enough on its own to store KV especially for longer sequence length queries that are becoming popular between turns or tool calls. Host DRAM extends capacity but remains node-bound and limited in aggregate footprint and ultimately has limited capacity.
② Atomic Claim
KV cache 會隨 sequence length 線性成長，並隨 workload parallelism 乘數成長，很快超出任何單一 memory tier 原本設計可承載的容量。
- Epistemic Mode:
ASSERTED - Mapping Status:
PARTIAL
③ Semantic Frame
{
"frame_type": "CLAIM_ONLY",
"qualifiers": {
"condition_text": null,
"numeric_mentions": [],
"temporal_mentions": []
},
"reason": "KV_CACHE_SEQUENCE_LENGTH_AND_PARALLELISM_NOT_CANONICAL_LINKED_IN_SOURCE_CLAIM",
"statement": "KV cache grows linearly with sequence length and multiplicatively with workload parallelism, exceeding a single memory tier's intended capacity。"
}④ Canonical Entity Mapping
| Role | Surface Label | Canonical Target |
|---|---|---|
| — | — | — |
⑤ Human Review
請在 Properties 逐項確認：
- 原文 → Atomic Claim 是否忠實
- Atomic Claim → Semantic Frame 是否忠實
- Canonical Entity mapping 是否正確
- Epistemic mode 是否保留原文語氣
- 最後選擇
review_action
Review state
Markdown 內文不是正式 approval。只有 Apply bridge 寫入的 Decision Ledger event 才是正式決策。