Exploiting Hardware Events to Reduce Energy Consumption of HPC Systems

LeeYongHo; KwonOSang; Kwangeun Byeon; KIMYONGJUN; HONG， SEOKIN

doi:https://doi.org/10.9708/jksci.2021.26.08.001

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Journal of The Korea Society of Computer and Information

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pISSN : 1598-849X / eISSN : 2383-9945

2020 KCI Impact Factor : 0.4

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Exploiting Hardware Events to Reduce Energy Consumption of HPC Systems

Journal of The Korea Society of Computer and Information

Abbr : JKSCI
2021, 26(8), pp.1-11
DOI :https://doi.org/10.9708/jksci.2021.26.08.001
Publisher : The Korean Society Of Computer And Information
Research Area : Computer Science

LeeYongHo ¹ , KwonOSang ² , Kwangeun Byeon ³ , KIMYONGJUN ⁴ , HONG， SEOKIN ⁵

¹ 성균관대학교
² 성균관대학교
³ 성균관대학교
⁴ 성균관대학교
⁵ 성균관대학교

ABSTRACT

This paper proposes a novel mechanism called Event-driven Uncore Frequency Scaler (eUFS) to improve the energy efficiency of the HPC systems. UFS exploits the hardware events such as LAPI (Last-level Cache Accesses Per Instructions) and CPI (Clock Cycles Per Instruction) to dynamically adjusts the uncore frequency. Hardware events are collected at a reference time period, and the target uncore frequency is determined using the collected event and the previous uncore frequency. Experiments with the NPB benchmarks demonstrate that the eUFS reduces the energy consumption by 6% on average for class C and D NPB benchmarks while it only increases the execution time by 2% on average.
KEYWORDS

HPC , DFS (Dynamic Frequency Scaling) , Uncore , Power Management , Low Power
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