Operation-Aware Power Capping

Wang, Bo; Miller, Julian; Terboven, Christian; Müller, Matthias S.

doi:10.1007/978-3-030-57675-2_5

Cited by 4 publications

(3 citation statements)

References 32 publications

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“…Many studies rely on adapting the frequency or number of cores under a user-specified power cap. In [30] the authors propose OPAM, an operation-aware management strategy. The idea is to apply the best core and uncore frequency to limit performance loss under a user-specified power cap.…”

Section: H Conclusionmentioning

confidence: 99%

Combining Uncore Frequency and Dynamic Power Capping to Improve Power Savings

Guermouche

2022

2022 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW)

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The US Department of Energy sets a limit of 20 to 30 MW for future exascale machines. In order to control their power consumption, modern processors provide many features. Power capping and uncore frequency scaling are examples of such features which allow to limit the power consumed by a processor.In this paper, we propose to combine dynamic power capping to uncore frequency scaling. We propose DUFP, an extension of DUF, an existing tool which dynamically adapts uncore frequency. DUFP dynamically adapts the processor power cap to the application needs. Finally, just like DUF, DUFP can tolerate performance loss up to a user-defined limit. With a controlled impact on performance, DUFP is able to provide power savings with no energy loss.The evaluation of DUFP shows that it manages to stay within the user-defined slowdown limits for most of the studied applications. Moreover, combining uncore frequency scaling to power capping: (i) improves power consumption by up to 13.98 % with additional energy savings for applications where uncore frequency scaling has a limited impact, (ii) improves power consumption by up to 7.90 % compared to using uncore frequency scaling by itself and (iii) leads to more than 5 % power savings at 5 % tolerated slowdown with no energy loss for most applications.

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Section: H Conclusionmentioning

confidence: 99%

Combining Uncore Frequency and Dynamic Power Capping to Improve Power Savings

Guermouche

2022

2022 IEEE International Parallel and Distributed Processing Symposium Workshops (IPDPSW)

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“…Regarding powercapping, studies like 18 show how dynamically setting core and uncore frequency can improve performance under powercapping. However, they consider iterative applications where decisions made in a loop are used in the next loop.…”

Section: Related Workmentioning

confidence: 99%

“…• If the memory bandwidth remained stable, then the drop comes from the behavior of the application itself rather than the impact of the uncore frequency. Based on this assumption, DUF decreases the uncore frequency (lines [16][17][18][19][20][21][22][23][24]. Note that DUF considers the memory bandwidth as stable if it decreased by less than the tolerated slowdown.…”

Section: Regulator Modulementioning

confidence: 99%

duf: Dynamic uncore frequency scaling to reduce power consumption

André

Dulong

Guermouche

2021

Concurrency and Computation

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Reducing the power consumption of applications has become one of the key challenges in high-performance computing. Recent processor architectures differentiate processor core frequency from its uncore frequency. As a consequence, in addition to tuning processor core frequency with Dynamic Voltage and Frequency Scaling (DVFS), power consumption can also be controlled through Uncore Frequency Scaling (UFS).This paper studies how the uncore frequency can be used as a leverage to improve power consumption. We propose DUF, a daemon process that dynamically adapts the uncore frequency to reduce an application power consumption with a user-defined limit on performance degradation.The evaluation of DUF on three different architectures shows that with no performance degradation (less than 0.6 %), DUF can reduce socket power consumption by 7.94 %. We also show that DUF is able to reduce the total energy consumption by up to 18.20 %.

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