QoS Handling with DVFS (CPUfreq & Devfreq) - The Linux Foundation

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DVFS Response Latency: Status Used in some product kernels. Trying to upstream QoS (global) Metric: “DVFS_RESPONSE_LATENCY” in us? For DVFS drivers registered. (?) Different “classes” of DVFS drivers??? CPUfreq Done: Instant reaction patch Work-to-do: redo response-latency after the metric is concluded. Devfreq Done: patchset In-progress: test & evaluation29Samsung Electronics
Page 3 and 4: Topics Introduction DVFS (Dynamic V
Page 5 and 6: Linux Kernel Power ManagementLinux
Page 7 and 8: Intro: DVFS 2/2 Sampling the utiliz
Page 9 and 10: Intro: Terms DVFS Target A device w
Page 11 and 12: Performance Issues of DVFS: 1/3 Iss
Page 13 and 14: Performance Issues of DVFS: 3/3 Iss
Page 15 and 16: The Possible Solution QoS handling
Page 17 and 18: QoS on DVFS Devices (DVFS f/w): Wor
Page 19 and 20: Handling QoS Requests: Design-After
Page 21 and 22: Handling QoS Requests: Status New G
Page 23 and 24: DVFS Response Latency: Motivation R
Page 26 and 27: DVFS Response Latency: DesignPM-QoS
Page 30 and 31: IntroductionIssues & SolutionsConcl
Page 32 and 33: Conclusion - Future Work 2/3 What
Page 34 and 35: Thank you!34Samsung Electronics
Page 36: Appendix: Links to Related Code Dev

QoS Handling with DVFS (CPUfreq & Devfreq) - The Linux Foundation

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