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发表于 2009-11-12 11:15:57
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在《Windows Native Processor Performance Control》一文中描述
In order to better utilize the power savings typically offered by the C3 state, Microsoft? Windows? employs a more aggressive C3 entry algorithm than did Windows 2000. This more aggressive use of C3 has caused stability issues with a very small subset of laptop computers. Additionally, there are some systems that may have known platform-level problems when attempting to use C-states.
大意是,在ACPI1.0中,CPU节电状态分C1,C2,C3。windows为了本本的省电,使用了比较强力的方式,会非常频繁的把CPU切换到C3状态,因为C3切换会有延时,会导致CPU的缓冲区跟有些应用软件冲突,会导致缓冲欠载。
IBM这个注册表声卡补丁,就是改了注册表这个值以避免windows霸道的节电方式带来的噪音。 |
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