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标题:
CPU频率达不到最高频率
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作者Author:
liyuanhe211
时间:
2015-10-15 01:49
标题:
CPU频率达不到最高频率
Ubuntu Server 14.04.1系统下,已经设置了Governor为Performance,查看CPU频率时,仍然不是最高频率(最高Turbo 3.8 GHz,实际为3.5)。有办法解决吗?
gauuser@liyuanhe-Ubuntu:~$ cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 1.60 GHz - 3.80 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 1.60 GHz and 3.80 GHz.
The governor "performance" may decide which speed to use
within this range.
current CPU frequency is 3.50 GHz.
analyzing CPU 1:
driver: intel_pstate
.....................
复制代码
作者Author:
sobereva
时间:
2015-10-15 12:24
上限3.8是指单核满载时Turbo boost的最高频率。
多核运行时TB技术提升频率的上限会比那个值低一些。
原因之一是因为多核运行发热量远比单核要大,所以多核时不会拉到那么高。
另外,当温度过高时,升频幅度也会有所降低。
作者Author:
liyuanhe211
时间:
2015-10-15 12:52
sobereva 发表于 2015-10-15 12:24
上限3.8是指单核满载时Turbo boost的最高频率。
多核运行时TB技术提升频率的上限会比那个值低一些。
原因 ...
明白了,谢谢Sob
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