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

More documents

Recommendations

Info

IntroductionIssues & Solutions• Performance Issues of DVFS• QoS on DVFS DevicesConclusion22Samsung Electronics
DVFS Response Latency: Motivation Reviving the “Issue 1” Responding to user inputs (e.g., mobile phone touchscreen) Case 1 Launching an app / Menuscreen flipping Requires high performance. (Nearly full) Case 2 Typing a TXT / Email Requires low-mid performance. (Often lowest) QoS requests upon inputs Unconditional performance increase. Case 2 wastes power! Do NOT increase performance unconditionally! Decide faster, not acting blindly. Control DVFS behavior!23Samsung 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: Handling QoS Requests: Status New G
Page 26 and 27: DVFS Response Latency: DesignPM-QoS
Page 29 and 30: DVFS Response Latency: Status Used
Page 31 and 32: Conclusion - Future Work 1/3 What
Page 33 and 34: Conclusion - Future Work 3/3 Future
Page 35 and 36: Appendix35Samsung Electronics

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

Create successful ePaper yourself

Delete template?

Save as template?