Difference between revisions of "CSE591 Low Power Architecture"
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| Line 45: | Line 45: | ||
'''Considerations:''' | '''Considerations:''' | ||
| − | *Existing power reduction schemes for LCDs and | + | *Existing power reduction schemes for LCDs and their applicability to Electrophoretic Displays (EPDs) |
| − | ::Dynamic Backlight and Contrast Scaling | + | ::-Dynamic Backlight and Contrast Scaling |
*The advantages of bi-stability of EPD over constant refresh of LCD | *The advantages of bi-stability of EPD over constant refresh of LCD | ||
| − | ::Possibility of redraw circuitry for bi-stable display which only addressed pixels which need to be updated | + | ::-Possibility of redraw circuitry for bi-stable display which only addressed pixels which need to be updated |
*Relevance of the backlight in LCD in comparison with "front-light" in EPD | *Relevance of the backlight in LCD in comparison with "front-light" in EPD | ||
| − | ::Best-case/Worst-case for each display and in what circumstances are they opposed, in what circumstances are they matched | + | ::-Best-case/Worst-case for each display and in what circumstances are they opposed, in what circumstances are they matched |
*Power characterization of power consumption of the LCD vs. the EPD | *Power characterization of power consumption of the LCD vs. the EPD | ||
*Power Modeling for LCD and EPD | *Power Modeling for LCD and EPD | ||
| − | ::Traditionally pixel switching has been ignored because it is insignificant compared to backlight and control circuitry, is the EPD a different case | + | ::-Traditionally pixel switching has been ignored because it is insignificant compared to backlight and control circuitry, is the EPD a different case |
| − | ::LCD switching power | + | ::-LCD switching power modeled as capacitors ([[Display Technology#Display Power|1.16, 1.5, 1.10]]) |
| − | ::EPD switching power | + | ::-EPD switching power modeled as resistor ([[Display Technology#Electrophroetic Displays|1.12]]) |
Revision as of 15:46, 2 March 2007
Contents
29 Jan 07 Presentation I
Instruction Level Power Dissipation in the Intel XScale Embedded Microprocessor
Tools for power analysis of microprocessors at the microarchitectural level:
- This software is based on the SimpleScalar software
- Download Wattch
5 Feb 07 Project I Topic due
12 Feb 07 Project I due
Simulation Software
DVFS Project Resources
- Concise references for DVFS project from 2003 using speedstep on an IBM Thinkpad
- Good linux kernel reference
Project II
- XScale project using
PXA25080200 already in Dr. Shrivastava's possession.
19 Feb 07 Presentation II
- -Energy Efficient Co-Adaptive Instruction Fetch and Issue (Throttling paper)
- -Instruction Flow-Based Front-end Throttling for Power-Aware High-Performance Processors (Throttling paper)
- Amdahl's Law (Wikipedia)
- Intel article on EPI throttling
- Best of Both Latency and Throughput (introduces EPI Throttling)
Vocabulary
5 March 07 Project I Take II
Considerations:
- Existing power reduction schemes for LCDs and their applicability to Electrophoretic Displays (EPDs)
- -Dynamic Backlight and Contrast Scaling
- The advantages of bi-stability of EPD over constant refresh of LCD
- -Possibility of redraw circuitry for bi-stable display which only addressed pixels which need to be updated
- Relevance of the backlight in LCD in comparison with "front-light" in EPD
- -Best-case/Worst-case for each display and in what circumstances are they opposed, in what circumstances are they matched
- Power characterization of power consumption of the LCD vs. the EPD
- Power Modeling for LCD and EPD
- -Traditionally pixel switching has been ignored because it is insignificant compared to backlight and control circuitry, is the EPD a different case
- -LCD switching power modeled as capacitors (1.16, 1.5, 1.10)
- -EPD switching power modeled as resistor (1.12)
