Konferenzbeitrag
The Hidden Costs of Shared CPU Resources: A Closer Look at Cgroups and QoS
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Text/Conference Paper
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Datum
2024
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Verlag
Gesellschaft für Informatik e.V.
Zusammenfassung
Previous research has demonstrated that Cgroups CPU isolation, while effective in guaranteeing resource limits, may not fully prevent performance degradation in co-located applications. This paper investigates the underlying causes of this performance drop by examining the impact of Hyper-Threading (HT) and Dynamic Frequency Scaling (DFS). Through controlled experiments using a database workload and a CPU intensive stressor, we analyze the changes in Quality of Service (QoS) isolation when these features are disabled. Our findings reveal the degree to which these mechanisms contribute to the observed performance interference and provide insights into the limitations of relying solely on Cgroups for robust CPU QoS isolation.