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

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IntroductionIssues & Solutions• Performance Issues of DVFS• QoS on DVFS MechanismsConclusion14Samsung Electronics
The Possible Solution QoS handling at DVFS devices Let DVFS frameworks (CPUfreq/Devfreq) handlenot, each DVFS drivers. Based on the table given by DVFS drivers E.g., Bus frequency100MHz133MHz266MHz400MhzDMA Throughput640MB/s851MB/s1702MB/s2560MB/s15Samsung 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: Performance Issues of DVFS: 3/3 Iss
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 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

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