Method for measuring utilization of a power managed CPU
US7788511B2 · kind B2 · utility
3Cited by
1References
7Claims
0Family size
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Inventor
Key dates
| Filing date | Aug 16, 2007 |
| Grant date | Aug 31, 2010 |
| Priority date | — |
| Expiry date | May 6, 2029 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An extremely low overhead method calculates CPU load in the presence of both CPU idling and frequency scaling. The method measures time the CPU is idled while waiting for a wakeup. This invention uses a feature in current DSPs with the capability of delaying ISR processing on wake from IDLE. Using this mechanism it is possible to determine the time before IDLE, the time immediately following CPU wakeup, and then run the wakeup ISR. The delta time can be accumulated and compared to total time to determine true CPU load.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.