Dynamic multi-clock management for embedded systems
Abstract/Contents
- Abstract
- This dissertation proposes a kernel-based dynamic clock management system, Power Clocks, which saves energy in embedded microcontrollers by changing the clock based on computation and I/O requests. In Power Clocks, kernel hardware drivers asynchronously request clocks, providing a set of constraints (e.g., maximum speed), which the kernel uses to dynamically choose the most efficient clock. To select a clock, Power Clocks makes use of the observation that though slower clocks tend to use less power and are suited for fixed time I/O operations, faster clocks generally use less less energy per clock tick, making them suitable for computation. Using Power Clocks, a networked sensing application consumes 31% less energy than the best static clock, and within 4% of an optimal hand-tuned dynamic clock strategy, achieving significant energy savings at no implementation cost to the application developer. Unlike application-level clock control, which is limited to a single application, Power Clocks provides energy savings even when there are multiple independent applications.
Description
| Type of resource | text |
|---|---|
| Form | electronic resource; remote; computer; online resource |
| Extent | 1 online resource. |
| Place | California |
| Place | [Stanford, California] |
| Publisher | [Stanford University] |
| Copyright date | 2020; ©2020 |
| Publication date | 2020; 2020 |
| Issuance | monographic |
| Language | English |
Creators/Contributors
| Author | Chiang, Holly |
|---|---|
| Degree supervisor | Levis, Philip |
| Thesis advisor | Levis, Philip |
| Thesis advisor | Engler, Dawson R |
| Thesis advisor | Horowitz, Mark (Mark Alan) |
| Degree committee member | Engler, Dawson R |
| Degree committee member | Horowitz, Mark (Mark Alan) |
| Associated with | Stanford University, Department of Electrical Engineering |
Subjects
| Genre | Theses |
|---|---|
| Genre | Text |
Bibliographic information
| Statement of responsibility | Holly Chiang. |
|---|---|
| Note | Submitted to the Department of Electrical Engineering. |
| Thesis | Thesis Ph.D. Stanford University 2020. |
| Location | electronic resource |
Access conditions
- Copyright
- © 2020 by Holly Chiang
- License
- This work is licensed under a Creative Commons Attribution Non Commercial 3.0 Unported license (CC BY-NC).
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