CosMoS: Architectural Support for Cost-Effective Data Movement in a Disaggregated Memory Systems

ACM JETCAS 2025 | DOI 10.1145/3725218
Puri, Jose, Tamarapalli(IIT Guwahati)

Disaggregated Memory System (DMS) 的硬件页迁移架构:预测热页、调度迁移顺序,并在迁移进行时不阻塞关键路径上的 remote cache miss

核心贡献

  1. Workload 特征化:页访问频率分布宽;多数页 criticality 在生命周期内稳定
  2. 硬件热页预测 + 调度:避免 OS 方案 ping-pong 与带宽浪费
  3. Early response:迁移与常规 remote cache-line 访问解耦

关键数字

指标
CXL remote vs local3–4× 延迟(170–250 ns
4KB 页迁移1.2–1.5 µs
vs SOTA / baseline+20% / +86%

与 wiki 交叉

Citations

[1] CosMoS_Disaggregated_Memory_Data_Movement_2025.pdf [2] cosmos-disaggregated-memory-data-movement.md — 结构化摘录