Invention Grant
US09218040B2 System cache with coarse grain power management 有权
具有粗粮电源管理的系统缓存

System cache with coarse grain power management
Abstract:
Methods and apparatuses for reducing power consumption of a system cache within a memory controller. The system cache includes multiple ways, and individual ways are powered down when cache activity is low. A maximum active way configuration register is set by software and determines the maximum number of ways which are permitted to be active. When searching for a cache line replacement candidate, a linear feedback shift register (LFSR) is used to select from the active ways. This ensures that each active way has an equal chance of getting picked for finding a replacement candidate when one or more of the ways are inactive.
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