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Jaehyun Hwang

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When DDIO Meets Page Coloring: Revisiting DDIO Performance with Sepia20th USENIX Symposium on Operating Systems Design and Implementation (OSDI '26)2026-07-13
Revisits DDIO’s poor packet-path throughput and shows conflict misses, not just reserved-way capacity, shrink usable LLC. Implements Sepia, a color-aware page…
Talk on
Lockify: Understanding Linux Distributed Lock Management Overheads in Shared StorageFAST '262026-02-24
Lockify implements a kernel DLM change in Linux 6.6.23 that replaces owner queries during file/directory creation with self-owner notifications and…
Talk on
Rearchitecting Linux Storage Stack for µs Latency and High Throughput15th USENIX Symposium on Operating Systems Design and Implementation (OSDI '21)2021-07-14
blk-switch is a Linux-kernel rearchitecture of the block layer that maps block-layer queues to driver queues and adds per-class egress queues, prioritization…
Talk on
TCP ≈ RDMA: CPU efficient Remote Storage Access with i10NSDI 20202020-02-25
i10 is a kernel-only implementation of a remote storage stack that runs on commodity NICs and lets unmodified applications use the kernel TCP/IP path while…
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