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#kv-cache

Push-Based KV Transfer to Improve TTFT and TPOT for Disaggregated Inference in vLLM (15 minute read)

TLDR AI ↗ · 2026-10-15 Cached

vLLM 推出基于推送(push-based)的 NIXL KV 缓存传输机制,将传输协调与准备工作移出关键路径,在分离式预填充/解码推理中最高可将 TTFT 改善 3 倍、TPOT 改善 30%。该功能在 AWS Trainium/EFA 集群上开发验证后,作为加速器无关特性贡献给 vLLM。

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#kv-cache

Sabi-Noema: A capability and efficiency focused fine-tune of Qwen 3.8 27B

Reddit r/LocalLLaMA ↗ · 2026-10-14

发布了 Qwen 3.8 27B 的两个后训练版本 Sabi-Noema 与 Sabi-Noema-MLA,在代码、智能体和工具调用能力上提升,同时将回答冗长度和推理 token 消耗减少约一半,并通过无训练的 MLA 注意力转换将 KV cache 最多压缩 8.4 倍。

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#kv-cache

PN-Mix: Pair-Norm Guided Mixed-Precision Key Cache Quantization for Efficient Long-Output LLM Inference

Hugging Face Daily Papers ↗ · 2026-10-14 Cached

提出PN-Mix,一种面向RoPE解码器LLM的混合精度键缓存量化方法,通过查询-键对范数识别显著通道对,在约2.26位平均精度下达到或超越现有方法在2.32–2.39位下的精度,且可优雅降级至1.5位。

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#kv-cache

@PyTorch: When you run a model over a long context, the KV cache gets huge, so you have to throw some of it away. There are compe…

X AI KOLs Timeline ↗ · 2026-10-13 Cached

预告在 PyTorch Conference North America 上,来自 AMD 的 Huanran Wang 将展示海报 FlexBudget:在统一的 FlexAttention 编译内核与固定显存预算下,只替换 KV 重要性规则,从而对长上下文 KV cache 丢弃策略做公平、免训练的对比。

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#kv-cache

@rohanpaul_ai: Agent traffic is a strange workload for an inference server. Each turn resends a long, nearly identical prefix (system …

X AI KOLs Following ↗ · 2026-10-13 Cached

At DigitalOcean's Open Intelligence Summit, Yifan Qiao of Inferact presents a Serve track session on running vLLM for agentic production workloads, highlighting why prefix caching and KV-cache reuse matter more for agent traffic than raw tokens per second.

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#kv-cache

@akshay_pachaar: 12 KV caching techniques I’d learn to optimize LLM inference. An LLM generates one token at a time, but each new token …

X AI KOLs Following ↗ · 2026-10-13 Cached

该推文总结了优化 LLM 推理的 12 种 KV 缓存技术,包括滑动窗口、跨层共享、MLA、量化、前缀复用、分页、驱逐和 GQA/MQA 等,帮助开发者根据具体瓶颈选择合适的组合。

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#kv-cache

Virtual Head Attention

Hugging Face Daily Papers ↗ · 2026-10-13 Cached

论文提出 Virtual Head Attention (VHA),通过轻量级线性 Q Premix 与 Linear Postmix 操作同时优化 KV cache 大小、训练/prefill FLOPs 与模型质量,在多个规模上超越 GQA 基线,并将 KV cache 相比 GQA-8 减少 4 倍。

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#kv-cache

@wquguru: Local deployment of models can't do without some acceleration tricks. Simply put, you can switch to models like Turbo; …

X AI KOLs Timeline ↗ · 2026-10-12 Cached

作者系统整理了本地部署模型的加速方案,包括在 macOS 上结合 Turbo、MLX、VAE Q8 和前缀 KV cache 让 Qwen-Image 2.1 提速近 5 倍,以及用 Uzu 的投机解码把 Qwen3.5-9B 从 22 tok/s 提升到 92 tok/s、用 TensorRT 让 Qwen 在 RTX 5090 上比 llama.cpp 快 3 倍等案例。

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#kv-cache

KV-Repurpose: A Testbed for Evaluating Non-Prefix KV-Cache Reuse

arXiv cs.CL ↗ · 2026-10-12 Cached

本文提出 KV-Repurpose,一个基于 vLLM 的开源测试平台,用于评估超越精确前缀匹配的分段 KV-cache 复用;在 Zipfian RAG 负载下,其 token 级缓存命中率达到 63.9%,远高于前缀缓存的 3.3%,并显著降低 TTFT。

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#kv-cache

How do people build batch agents now?

Reddit r/AI_Agents ↗ · 2026-10-11

作者通过与几位构建 AI agent 的开发者交流,总结出批量 agent 任务的共同模式(延迟容忍、无交互、大批量),并指出现有实时与批量推理 API 均无法很好满足这类工作负载,尤其是 KV cache 命中率问题导致批量 API 实际上难以节省成本。

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#kv-cache

Strata with Qwen3.8 Flash Next UD-Q4_K_XL

Reddit r/LocalLLaMA ↗ · 2026-10-10

A user reports strong single-request decode speeds running Qwen3.8-Flash-Next in Unsloth's UD-Q4_K_XL quant on Strata with an RTX PRO 6000, showing roughly 2x faster throughput than vLLM on the same GPU across prose, counting, coding, and reasoning tasks.

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#kv-cache

@rohanpaul_ai: New Tsinghua paper builds TokenRouter, a serving system that runs per-token small-and-large model routing at upto 64.15…

X AI KOLs Timeline ↗ · 2026-10-10 Cached

清华团队发表 TokenRouter 论文,提出一种按 token 级别在大小模型间路由的 LLM 服务系统,通过独立服务器协作与 KV cache 传递,在 5 种路由方法上实现相比现有最强框架 2.01 到 64.15 倍的吞吐提升。

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#kv-cache

Real Long-Term Memory for AI: A 50-Million-Token Window That Is Faster and Cheaper Than Recompute

arXiv cs.CL ↗ · 2026-10-09 Cached

提出名为 galahad-kv 的记忆层,将 KV 注意力状态持久化到加密 NVMe 存储,实现 5000 万 token 的长期记忆窗口,恢复比重新计算快 2.8–4.3 倍且 GPU 能耗降低 8.8–12.3 倍,并保持恒定显存。

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#kv-cache

RaReCache: Bridging the Gap in Cross-Model KV Cache Reuse via Rank disagreement-based Selective Recomputation

arXiv cs.AI ↗ · 2026-10-09 Cached

RaReCache 提出一种基于秩分歧(rank disagreement)的选择性重计算框架,使大型模型能够直接复用小型模型预填充的 KV 缓存,在大幅缩小参数差距的同时保留 95-99% 的目标精度,并实现最高 3.04 倍的预填充加速。

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#kv-cache

@PyTorch: Agentic workloads generate long, expanding context across repeated model calls, tool execution, and parallel subagents.…

X AI KOLs Following ↗ · 2026-10-08 Cached

PyTorch 博客介绍 NVIDIA Dynamo 如何通过统一的 session 级标识符,将请求级推理服务系统升级为程序感知系统,实现会话感知路由、共享 KV 缓存索引与跨 vLLM/SGLang 的程序化缓存迁移,以高效服务具有长上下文和并行子代理的 agentic 工作负载。

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#kv-cache

A Self-Pruning Transformer: Extreme KV-Cache Compression with Universal Attention

arXiv cs.LG ↗ · 2026-10-08 Cached

IBM Research and UIUC researchers propose Universal Attention, a self-pruning transformer framework combining first- and second-order key statistics into expressive forget gates that preserve RoPE and Softmax attention while achieving state-of-the-art 10x KV-cache compression and 25x compression at 16k context length.

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#kv-cache

Task-Oriented Key-Layer KV Communication for Efficient Latent Multi-Agent Collaboration

arXiv cs.LG ↗ · 2026-10-08 Cached

The paper proposes KITE, a training-free framework that shifts latent multi-agent KV communication from sender-side state fidelity to receiver-side task sufficiency, transmitting only a task-effective key layer. Experiments show 28-36× communication reduction, up to 3× inference speedup, and accuracy gains of up to 23.3 percentage points across seven benchmarks.

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#kv-cache

KVFetch: Temporal Prefetching for the Missing Half of KV Cache Compression

arXiv cs.LG ↗ · 2026-10-08 Cached

The paper introduces KVFetch, a training-free framework that adds a temporal recall channel to score-based KV cache compressors to fix "sequential forgetting" (verbatim copying breaking under compression), recovering copying performance from 0.8 to 78.4 and boosting the RULER-16K average by +8.4 at iso-budget.

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#kv-cache

Cache the Encoder Within:Compact, Reusable Memory across LLM Queries

arXiv cs.CL ↗ · 2026-10-08 Cached

EncBank extends CoMem's intermediate-state interface, treating an LLM's lower layers as a reusable document encoder whose compact low-bit outputs can be cached and reused across queries. Evaluated on Qwen backbones, 4-bit storage nearly matches native precision while cutting persistent storage to 28.1%, with notable prefill speedups at some accuracy cost.

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#kv-cache

Why isn't the industry freaking out about DeepSeek 4.1 Flash?

Hacker News Top ↗ · 2026-10-08 Cached

作者基于一个月的重度使用体验,认为 DeepSeek 4.1 Flash 在编程任务上已与 Claude Opus 等前沿模型难以区分,但成本低几个数量级,业界却未因此震动。文章指出 KV 缓存缩减约 437 倍使全天会话成本不到一美元,预示便宜且'足够好'的中国模型正在改变开发者的工作方式。

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