ElevenLabs 工程师解析如何缓解 AI 推理算力短缺
ElevenLabs 研究工程师 Angelos Perivolaropoulos 介绍了如何通过标准工程优化,将语音推理的单 GPU 服务能力从 1 名用户提升至 70 名,架构级改造则可达到约 140 名。连续批处理、FP8 量化、多 token 预测和经蒸馏适配的 FP8 KV cache 是主要手段,其中 KV cache 缩小 2.5x 后,吞吐量从 28 名用户增至 70 名。各项技术会引入延迟、内存上限或质量损失,实际选择取决于具体工作负载。
t. The KV cache holds far less redundant capacity than the weights do, so compressing it is genuinely lossy. Angelos was candid about this from his own testing: the much-discussed Google method TurboQuant was announced as lossless but, in his experience, proved lossy in practice, because any change to the cache is hard for the model to recover from. The fix is again on the training side: distill the model so it grows accustomed to a lower-precision FP8 cache, and you keep most of the accuracy wh
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