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
- Workload 特征化:页访问频率分布宽;多数页 criticality 在生命周期内稳定
- 硬件热页预测 + 调度:避免 OS 方案 ping-pong 与带宽浪费
- Early response:迁移与常规 remote cache-line 访问解耦
关键数字
| 指标 | 值 |
|---|---|
| CXL remote vs local | 3–4× 延迟(170–250 ns) |
| 4KB 页迁移 | 1.2–1.5 µs |
| vs SOTA / baseline | +20% / +86% |
与 wiki 交叉
- End-to-End Memory Data Path — 解耦内存数据移动
- DRAM Memory System — tiered / remote memory 背景
Citations
[1] CosMoS_Disaggregated_Memory_Data_Movement_2025.pdf [2] cosmos-disaggregated-memory-data-movement.md — 结构化摘录