ReFlux: Reversible Compute Placement for CXL-Enabled Storage

[2604.02442] ReFlux: Reversible Compute Placement for CXL-Enabled Storage Skip to main content Search Submit Donate Log in Computer Science > Operating Systems arXiv:2604.02442 (cs) [Submitted on 2 Apr 2026 ( v1 ), last revised 25 Aug 2026 (this version, v2)] Title: ReFlux: Reversible Compute Placement for CXL-Enabled Storage Authors: Yanpeng Hu , Yiwei Yang , Yusheng Zheng , Estabon Ramos , Jianchang Su , Andi Quinn , Wei Zhang View PDF HTML (experimental) Abstract: Static offload to computational storage devices proves brittle because device-side processors throttle under sustained thermal load, while opaque, vendor-specific interfaces inflate adoption costs so severely that no computational storage platform has achieved broad deployment; to address this, we argue that storage-side compute should be reversible, allowing individual pipeline stages to migrate between host and device at runtime beneath standard interfaces that require zero application modification. We present ReFlux, which realizes this principle on CXL SSDs by decomposing I/O-path logic into migratable storage actors compiled to WebAssembly, with actors sharing state through coherent this http URL regions so that only lightweight control state, roughly 8 KB, moves during migration, while a thermal-aware scheduler triggers per-stage drain-and-switch when device temperature or queue pressure rises, offloading compute-intensive actors to the host while leaving I/O-bound stages on the device. In our evaluation on an FPGA-based CXL SSD prototype and two production CSDs, ReFlux sustains over twice the throughput of thermally throttled CSDs under 30-minute sustained writes, delivers three to four times the inference throughput under KV-cache pressure, and reduces host CPU utilization by 65% through MWAIT-based notification. Subjects: Operating Systems (cs.OS) Cite as: arXiv:2604.02442 [cs.OS] (or arXiv:2604.02442v2 [cs.OS] for this version) https://doi.org/10.48550/arXiv.2604.02442 Focus to learn more arXiv-issued DOI via DataCite Submission history From: YanPeng Hu [ view email ] [v1] Thu, 2 Apr 2026 18:14:28 UTC (269 KB) [v2] Tue, 25 Aug 2026 01:47:39 UTC (191 KB) Full-text links: Access Paper: View PDF HTML (experimental) TeX Source view license Additional Features Audio Summary Current browse context: cs.OS < prev | next > new | recent | 2026-04 Change to browse by: cs References & Citations SciX Google Scholar Semantic Scholar export BibTeX citation Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer ( What is the Explorer? ) Connected Papers Toggle Connected Papers ( What is Connected Papers? ) Litmaps Toggle Litmaps ( What is Litmaps? ) scite.ai Toggle scite Smart Citations ( What are Smart Citations? ) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv ( What is alphaXiv? ) Links to Code Toggle CatalyzeX Code Finder for Papers ( What is CatalyzeX? ) DagsHub Toggle DagsHub ( What is DagsHub? ) GotitPub Toggle Gotit.pub ( What is GotitPub? ) Huggingface Toggle Hugging Face ( What is Huggingface? ) ScienceCast Toggle ScienceCast ( What is ScienceCast? ) Demos Demos Replicate Toggle Replicate ( What is Replicate? ) Spaces Toggle Hugging Face Spaces ( What is Spaces? ) Spaces Toggle TXYZ.AI ( What is TXYZ.AI? ) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower ( What are Influence Flowers? ) Core recommender toggle CORE Recommender ( What is CORE? ) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs . Which authors of this paper are endorsers? | Disable MathJax ( What is MathJax? ) We gratefully acknowledge support from our major funders , member institutions , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab)

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