Reconsidering OS Memory Optimizations in the Presence of Disaggregated Memory

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Claim: disaggregated memory with 750 ns–1.5 µs remote latency flips usual OS choices, so the authors build HotBox, a base-page-only memory manager that uses a hybrid access model (remote cache line accesses plus on-demand page migration) and an adaptive throttling scanner driven by LLC miss counters. Evaluation on an Intel PMAP emulator shows huge pages cause “hotness fragmentation” and can slow workloads, while HotBox outperforms Nimble and achieves near-native application time when local RAM holds ~40% of the working set at 750 ns.

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" chapters (7)

1. 0:00Start
2. 0:19Reconsidering Operating System Memory Memory Optimizations in the Presence of Disaggregated Memory
3. 4:07Hybrid Access Model
4. 6:28Impact of Huge Pages in Local Memory in the Disaggregated Memory
5. 10:11Hotbox
6. 11:08Adaptive Scanning and Migration Utility Mechanisms
7. 22:22Live Questions