Copyright by William Lloyd Bircher 2010 - The Laboratory for ...

Table of Contents
Chapter 1 Introduction ....................................................................................................1
1.1 Attributing Power in Multi-Core Systems ........................................................... 1
1.2 When to Adapt ..................................................................................................... 4
1.3 Power Variation is Periodic.................................................................................. 6
1.4 Objectives ............................................................................................................. 8
1.5 Thesis Statement .................................................................................................. 9
1.6 Contributions ........................................................................................................ 9
1.7 Organization ....................................................................................................... 11
Chapter 2 Methodology ..................................................................................................13
2.1 Measuring System and Component Power ........................................................ 13
2.1.1 Aggregate CPU Power Measurement ......................................................... 14
2.1.2 Subsystem-Level Power in a Server System .............................................. 15
2.1.3 Subsystem-Level Power in a Mobile System ............................................. 17
2.2 Controlling Temperature, Voltage and Frequency ............................................. 19
2.3 Performance Counter Sampling ......................................................................... 21
2.4 Workloads .......................................................................................................... 21
Chapter 3 Modeling CPU Power using Performance Monitoring Counters ............24
3.1 Correlation of Performance Counters to Power ................................................. 24
3.2 IPC Related Power Models ................................................................................ 27
3.3 Micro ROM Related Power Models................................................................... 30
3.4 Power Management Effects ............................................................................... 31
3.4.1 Active and Idle Power Management ........................................................... 32
3.4.2 Active Power Management: P-states .......................................................... 33
3.4.3 Idle Power Management: C-states .............................................................. 34
3.4.4 Case Study: Processor Power Management Characteristics ....................... 34
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