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Creators/Authors contains: "Huang, Yujin"

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  1. ; ; (, ACM SIGMETRICS Performance Evaluation Review)
    To represent the entire carbon footprint of computing devices, carbon metrics often include both an embodied cost (i.e., carbon cost to produce the device) and an operational cost (i.e., carbon cost to run the device). The embodied carbon cost is typically high, but it is amortized over the lifetime of the device. In this vision statement, we argue that for carbon metrics to be useful, we need (i) accurate metrics for lifetime, which are challenging for SSDs, and (ii) correct reasoning about carbon costs when using such metrics. 
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    Free, publicly-accessible full text available August 26, 2026
  2. ; ; ; ; ; ; ; ; ; (, 19th USENIX Symposium on Operating Systems Design and Implementation)
    Production distributed systems provide rich features, but various defects can cause a system to silently violate its semantics without explicit errors. Such failures cause serious consequences. Yet, they are extremely challenging to detect, as it requires deep domain knowledge and substantial manual efforts to write good checkers. In this paper, we explore a novel approach that directly derives semantic checkers from system test code. We first present a large-scale study on existing system test cases. Guided by the study findings, we develop T2C, a framework that uses static and dynamic analysis to transform and generalize a test into a runtime checker. We apply T2C on four large, popular distributed systems and successfully derive tens to hundreds of checkers. These checkers detect 15 out of 20 real-world silent failures we reproduce and incur small runtime overhead. 
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    Free, publicly-accessible full text available July 7, 2026