|
|

楼主 |
发表于 2009-9-12 11:52:15
|
显示全部楼层
Post by freeobject;2026175
cpufrequitils控制cpu的运行频率.你要检查一下cpu的运行情况,一般是最低频率运行,比如我的2.0Gcore dual一般是以800MHz运行.
如果不是这个情况,那说明你的cpu frequency management设置有问题, 我在内核里面设置的是user control
俺的cpu都是1000MHz运行的。下面是powertop的结果:- Cn 平均停留時間 P-states (CPU 時脈)
- C0 (cpu 忙碌中) (15.9%) 2.17 GHz 0.6%
- 巡察 0.0毫秒 1.67 GHz 0.0%
- C1 mwait 0.0毫秒 1333 MHz 0.1%
- C2 mwait 0.7毫秒 1000 MHz 99.3%
-
复制代码 cpufreq-info:- cpufrequtils 005: cpufreq-info (C) Dominik Brodowski 2004-2006
- Report errors and bugs to cpufreq@vger.kernel.org, please.
- analyzing CPU 0:
- driver: acpi-cpufreq
- CPUs which need to switch frequency at the same time: 0
- hardware limits: 1000 MHz - 2.17 GHz
- available frequency steps: 2.17 GHz, 1.67 GHz, 1.33 GHz, 1000 MHz
- available cpufreq governors: ondemand, conservative, performance
- current policy: frequency should be within 1000 MHz and 2.17 GHz.
- The governor "ondemand" may decide which speed to use
- within this range.
- current CPU frequency is 1000 MHz.
- cpufreq stats: 2.17 GHz:2.14%, 1.67 GHz:0.72%, 1.33 GHz:0.92%, 1000 MHz:96.23% (17893)
- analyzing CPU 1:
- driver: acpi-cpufreq
- CPUs which need to switch frequency at the same time: 1
- hardware limits: 1000 MHz - 2.17 GHz
- available frequency steps: 2.17 GHz, 1.67 GHz, 1.33 GHz, 1000 MHz
- available cpufreq governors: ondemand, conservative, performance
- current policy: frequency should be within 1000 MHz and 2.17 GHz.
- The governor "ondemand" may decide which speed to use
- within this range.
- current CPU frequency is 1000 MHz.
- cpufreq stats: 2.17 GHz:1.51%, 1.67 GHz:0.49%, 1.33 GHz:0.73%, 1000 MHz:97.26% (11533)
-
复制代码 |
|