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超越热度:面向分层内存的ARM SPE云与LLM工作负载高分辨率内存特性分析

arXiv:2610.32711v1 发布类型:新 摘要:数据分析与大语言模型工作负载对内存的需求正迅速增长,推高了云环境和数据中心的内存成本。多层级内存已成为一种颇具前景的解决方案,能够在性能与成本之间实现平衡。然而,要有效利用多层级内存,必须深入理解工作负载的内存访问行为。本文提出了一种高分辨率的内存特性分析方法,用于评估针对特定工作负载的多层级内存使用机会。鉴于基于ARM的处理器在数据中心中的部署日益增多,我们采用ARM最新的统计剖析扩展(SPE)来实现该方法。通过对CloudSuite和LLM应用中的八个内存密集型工作负载进行特性分析,我们识别出了具有区域特异性的访问模式

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Abstract:Memory demands from data analytics and LLM workloads grow rapidly, driving up memory costs in cloud and data centers. Multi-tier memory has emerged as a promising solution to balance performance and cost. However, effectively leveraging it requires a deep understanding of workload memory behaviors. This work introduces a high-resolution memory characterization methodology for analyzing workload-specific opportunities for multi-tier memory usage. In response to the increasing deployment of ARM-based processors in data centers, we implement our methodology using the recent Statistical Profiling Extension (SPE) for ARM. By characterizing eight memory-intensive workloads from CloudSuite and LLM applications, we identify region-specific access patterns, evaluate the effectiveness of cloud-oriented cache hierarchies, and propose new metrics based on memory idle periods and latency profiles to determine suitable data placement for tiered memory.

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