EPISODE · Apr 8, 2026 · 20 MIN
NVDIA:KV缓存变换编码KVTC 20倍压缩打破大模型内存墙
from 每日AI · host 每日新闻
KVTC,一种针对大语言模型(LLM)推理过程中 KV 缓存(Key-Value Cache) 的轻量级压缩方案。由于模型在多轮对话中会产生巨大的内存占用,该技术借鉴了传统媒体压缩原理,通过 PCA 特征解耦、动态位宽量化和 DEFLATE 熵编码,在不改变模型参数的情况下实现了最高 20 到 40 倍 的压缩率。实验证明,kvtc 在 Llama 3 和 Qwen 等主流模型上能有效保持推理精度和长文本处理能力,显著优于传统的权杖剔除或简单量化方法。通过大幅缩减缓存体积,该方案不仅缓解了显存压力,还显著提升了 TTFT(首字延迟) 性能,优化了跨节点的传输效率。这种转换编码方式为高效、低成本的大规模模型服务提供了实用的构建模块。
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NVDIA:KV缓存变换编码KVTC 20倍压缩打破大模型内存墙
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