[2605.27745] CXL-ClusterSim: Modeling CXL-based Disaggregated Memory Cluster for Pooling and Sharing using gem5 and SST

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Computer Science > Hardware Architecture

arXiv:2605.27745 (cs)

[Submitted on 26 May 2026]

Title:CXL-ClusterSim: Modeling CXL-based Disaggregated Memory Cluster for Pooling and Sharing using gem5 and SST

Authors:Kaustav Goswami, Maryam Babaie, Hoa Nguyen, Venkatesh Akella, Jason Lowe-Power<br>View a PDF of the paper titled CXL-ClusterSim: Modeling CXL-based Disaggregated Memory Cluster for Pooling and Sharing using gem5 and SST, by Kaustav Goswami and 4 other authors

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Abstract:Large-scale AI training and inference require hundreds of gigabytes to terabytes of DRAM with high peak to average utilization ratios, resulting in overprovisioning. In cloud computing, DRAM constitutes a significant share of the cost. Yet, as shown by recent articles, DRAM is heavily under utilized. Memory disaggregation is a solution to both these problems. With the advent of the CXL protocol, there is renewed interest in designing and optimizing computing systems with disaggregated memory. However, at present, there are limited simulation tools available for exploring the design space and evaluating the performance tradeoffs in computer systems with disaggregated memory.

In this paper, we propose CXL-ClusterSim, a full-system modeling and simulation framework by combining the gem5 simulator for fidelity, with the Structural Simulation Toolkit (SST) for parallel simulation. We outline the challenges in creating this simulation infrastructure and present a design that is scalable, flexible, and reasonably fast to help computer architects to explore the design space of CXL-based disaggregated memory and identify new opportunities for hardware/software codesign and performance optimization.

Subjects:

Hardware Architecture (cs.AR)

ACM classes:<br>I.6.0

Cite as:<br>arXiv:2605.27745 [cs.AR]

(or<br>arXiv:2605.27745v1 [cs.AR] for this version)

https://doi.org/10.48550/arXiv.2605.27745

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arXiv-issued DOI via DataCite (pending registration)

Submission history<br>From: Kaustav Goswami [view email]<br>[v1]<br>Tue, 26 May 2026 22:38:47 UTC (711 KB)

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