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• W4317505921 abstract "Abstract Understanding the influence of configuration options on the performance of a software system is key for finding optimal system configurations, system understanding, and performance debugging. In the literature, a number of performance-influence modeling approaches have been proposed, which model a configuration option’s influence and a configuration’s performance as a scalar value. However, these point estimates falsely imply a certainty regarding an option’s influence that neglects several sources of uncertainty within the assessment process, such as (1) measurement bias, choices of model representation and learning process, and incomplete data. This leads to the situation that different approaches and even different learning runs assign different scalar performance values to options and interactions among them. The true influence is uncertain, though. There is no way to quantify this uncertainty with state-of-the-art performance modeling approaches. We propose a novel approach, P4, which is based on probabilistic programming, that explicitly models uncertainty for option influences and consequently provides a confidence interval for each prediction alongside a scalar. This way, we can explain, for the first time, why predictions may be erroneous and which option’s influence may be unreliable. An evaluation on 13 real-world subject systems shows that P4’s accuracy is in line with the state of the art while providing reliable confidence intervals, in addition to scalar predictions. We qualitatively explain how uncertain influences of individual options and interactions cause inaccurate predictions." @default.
• W4317505921 created "2023-01-20" @default.
• W4317505921 creator A5004072538 @default.
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• W4317505921 date "2023-01-19" @default.
• W4317505921 modified "2023-10-18" @default.
• W4317505921 title "Mastering uncertainty in performance estimations of configurable software systems" @default.
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• W4317505921 doi "https://doi.org/10.1007/s10664-022-10250-2" @default.
• W4317505921 hasPublicationYear "2023" @default.
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