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| Content Provider | ACM Digital Library |
|---|---|
| Author | Semeraro, Greg Dropsho, Steven G. Magklis, Grigorios Dwarkadas, Sandhya Albonesi, David H. Scott, Michael L. |
| Abstract | We describe the design, analysis, and performance of an on--line algorithm to dynamically control the frequency/voltage of a Multiple Clock Domain (MCD) microarchitecture. The MCD microarchitecture allows the frequency/voltage of microprocessor regions to be adjusted independently and dynamically, allowing energy savings when the frequency of some regions can be reduced without significantly impacting performance.Our algorithm achieves on average a 19.0% reduction in Energy Per Instruction (EPI), a 3.2% increase in Cycles Per Instruction (CPI), a 16.7% improvement in Energy--Delay Product, and a Power Savings to Performance Degradation ratio of 4.6. Traditional frequency/voltage scaling techniques which apply reductions globally to a fully synchronous processor achieve a Power Savings to Performance Degradation ratio of only 2--3. Our Energy--Delay Product improvement is 85.5% of what has been achieved using an off--line algorithm. These results were achieved using a broad range of applications from the MediaBench, Olden, and Spec2000 benchmark suites using an algorithm we show to require minimal hardware resources. |
| Starting Page | 356 |
| Ending Page | 367 |
| Page Count | 12 |
| File Format | |
| ISBN | 0769518591 |
| ISSN | 10724451 |
| Language | English |
| Publisher | Association for Computing Machinery (ACM) |
| Publisher Date | 2002-11-18 |
| Access Restriction | Subscribed |
| Content Type | Text |
| Resource Type | Article |
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