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arXiv 2408.07326cs.AR
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LPU:一种面向大语言模型推理的延迟优化高可扩展处理器

LPU: A Latency-Optimized and Highly Scalable Processor for Large Language Model Inference

Seungjae Moon, Jung-Hoon Kim, Junsoo Kim, Seongmin Hong, Junseo Cha, Minsu Kim, Sukbin Lim, Gyubin Choi, Dongjin Seo, Jongho Kim, Hunjong Lee, Hyunjun Park, Rye… 展开作者

Seungjae Moon, Jung-Hoon Kim, Junsoo Kim, Seongmin Hong, Junseo Cha, Minsu Kim, Sukbin Lim, Gyubin Choi, Dongjin Seo, Jongho Kim, Hunjong Lee, Hyunjun Park, Ryeowook Ko, Soongyu Choi, Jongse Park, Jinwon Lee, Joo-Young Kim

AI总结:

针对大语言模型推理需求,HyperAccel推出延迟优化高可扩展的LPU处理器,搭配HyperDex软件框架,通过平衡内存带宽与计算、隐藏多芯同步延迟,在推理速度、能效上均优于GPU及对应GPU服务器。

摘要:

OpenAI的ChatGPT的爆发式出现推动了大语言模型(LLM)的全球化普及,这类模型包含数十亿个预训练参数,涵盖了句法与语义层面的信息。HyperAccel推出了延迟处理单元(latency processing unit,LPU),这是一种用于加速LLM推理的延迟优化、高可扩展的处理器架构。LPU通过精简数据流完美平衡了内存带宽与计算逻辑,以最大化性能与效率。LPU配备可扩展同步链路(expandable synchronization link,ESL),可隐藏多块LPU之间的数据同步延迟。HyperDex作为一款直观的软件框架,与LPU互补,用于运行LLM应用。对于13亿参数模型,LPU的推理延迟为1.25毫秒/令牌;对于660亿参数模型则为20.9毫秒/令牌,分别比GPU快2.09倍和1.37倍。LPU采用三星4nm工艺综合,总面积为0.824平方毫米,功耗为284.31毫瓦。基于LPU的服务器的能效分别是NVIDIA H100和L4服务器的1.33倍和1.32倍。

英文摘要:

The explosive arrival of OpenAI's ChatGPT has fueled the globalization of large language model (LLM), which consists of billions of pretrained parameters that embodies the aspects of syntax and semantics. HyperAccel introduces latency processing unit (LPU), a latency-optimized and highly scalable processor architecture for the acceleration of LLM inference. LPU perfectly balances the memory bandwidth and compute logic with streamlined dataflow to maximize performance and efficiency. LPU is equipped with expandable synchronization link (ESL) that hides data synchronization latency between multiple LPUs. HyperDex complements LPU as an intuitive software framework to run LLM applications. LPU achieves 1.25 ms/token and 20.9 ms/token for 1.3B and 66B model, respectively, which is 2.09x and 1.37x faster than the GPU. LPU, synthesized using Samsung 4nm process, has total area of 0.824 mm2 and power consumption of 284.31 mW. LPU-based servers achieve 1.33x and 1.32x energy efficiency over NVIDIA H100 and L4 servers, respectively.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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