Improving the Efficiency of Power Management via Dynamic Interrupt Management

Ki Dong Kang, Hyungwon Park, Gyeongseo Park, Daehoon Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this paper, we first analyze the effects of interrupt management on response latency of the latency-critical application and the efficiency of current dynamic power management governor which determines Voltage and Frequency States (V/F states) based on CPU utilization. We also demonstrate that interrupt management provides a governor an opportunity to decrease the V/F state without performance degradation. Next, we propose I-state that adjusts the interrupt rate based on the V/F state determined by the governor. When a core is highly utilized with a high V/F state, I-state improves response latency by decreasing interrupt rate, moderating the load on the CPU. I-state also improves energy-efficiency by making the governor decrease the V/F state more often. When a core is not highly utilized while operating at low V/F states, I-state improves response latency by increasing interrupt rate, which can notify the processor of packet arrivals faster so that the CPU processes the packets quickly. Our experimental results show that I-state improves 95th percentile latency by up to 15.9x while reducing energy consumption by up to 17.6%.

Original languageEnglish
Title of host publicationProceedings - 2020 IEEE 38th International Conference on Computer Design, ICCD 2020
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages377-380
Number of pages4
ISBN (Electronic)9781728197104
DOIs
StatePublished - Oct 2020
Event38th IEEE International Conference on Computer Design, ICCD 2020 - Hartford, United States
Duration: 18 Oct 202021 Oct 2020

Publication series

NameProceedings - IEEE International Conference on Computer Design: VLSI in Computers and Processors
Volume2020-October
ISSN (Print)1063-6404

Conference

Conference38th IEEE International Conference on Computer Design, ICCD 2020
Country/TerritoryUnited States
CityHartford
Period18/10/2021/10/20

Bibliographical note

Publisher Copyright:
© 2020 IEEE.

Keywords

  • Dynamic Voltage and Frequency Scaling
  • Interrupt Management
  • Latency critical application
  • Power Management

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