Cache power management
US10359831B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 2, 2017 |
| Grant date | Jul 23, 2019 |
| Priority date | — |
| Expiry date | Sep 15, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method of operating a cache and corresponding apparatus are provided. The cache is capable of being only partially powered, and a decision to reduce the proportion of the cache which is currently powered is made based on calculating a memory bandwidth equivalent of expending the current active cache leakage power on memory access. The cache hit bandwidth is compared against this memory bandwidth equivalent and when the cache hit bandwidth is less than the memory bandwidth equivalent, the proportion of the cache which is currently powered is reduced. A analogous decision may also be made and based on calculating a cache hit bandwidth equivalent for an increment increase in cache leakage power, and when the cache miss bandwidth exceeds the cache hit bandwidth equivalent, the proportion of the cache which is currently powered is increased.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.