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(translating by runningwater)
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CPU Power Manager – Control And Manage CPU Frequency In Linux
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======
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If you are a laptop user, you probably know that power management on Linux isn’t really as good as on other OSes. While there are tools like **TLP** , [**Laptop Mode Tools** and **powertop**][1] to help reduce power consumption, overall battery life on Linux isn’t as good as Windows or Mac OS. Another way to reduce power consumption is to limit the frequency of your CPU. While this is something that has always been doable, it generally requires complicated terminal commands, making it inconvenient. But fortunately, there’s a gnome extension that helps you easily set and manage your CPU’s frequency – **CPU Power Manager**. CPU Power Manager uses the **intel_pstate** frequency scaling driver (supported by almost every Intel CPU) to control and manage CPU frequency in your GNOME desktop.
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Another reason to use this extension is to reduce heating in your system. There are many systems out there which can get uncomfortably hot in normal usage. Limiting your CPU’s frequency could reduce heating. It will also decrease the wear and tear on your CPU and other components.
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### Installing CPU Power Manager
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First, go to the [**extension’s page**][2], and install the extension.
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Once the extension has installed, you’ll get a CPU icon at the right side of the Gnome top bar. Click the icon, and you get an option to install the extension:
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If you click **“Attempt Installation”** , you’ll get a password prompt. The extension needs root privileges to add policykit rule for controlling CPU frequency. This is what the prompt looks like:
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Type in your password and Click **“Authenticate”** , and that finishes installation. The last action adds a policykit file – **mko.cpupower.setcpufreq.policy** at **/usr/share/polkit-1/actions**.
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After installation is complete, if you click the CPU icon at the top right, you’ll get something like this:
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### Features
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* **See the current CPU frequency:** Obviously, you can use this window to see the frequency that your CPU is running at.
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* **Set maximum and minimum frequency:** With this extension, you can set maximum and minimum frequency limits in terms of percentage of max frequency. Once these limits are set, the CPU will operate only in this range of frequencies.
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* **Turn Turbo Boost On and Off:** This is my favorite feature. Most Intel CPU’s have “Turbo Boost” feature, whereby the one of the cores of the CPU is boosted past the normal maximum frequency for extra performance. While this can make your system more performant, it also increases power consumption a lot. So if you aren’t doing anything intensive, it’s nice to be able to turn off Turbo Boost and save power. In fact, in my case, I have Turbo Boost turned off most of the time.
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* **Make Profiles:** You can make profiles with max and min frequency that you can turn on/off easily instead of fiddling with max and frequencies.
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### Preferences
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You can also customize the extension via the preferences window:
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As you can see, you can set whether CPU frequency is to be displayed, and whether to display it in **Mhz** or **Ghz**.
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You can also edit and create/delete profiles:
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You can set maximum and minimum frequencies, and turbo boost for each profile.
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### Conclusion
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As I said in the beginning, power management on Linux is not the best, and many people are always looking to eek out a few minutes more out of their Linux laptop. If you are one of those, check out this extension. This is a unconventional method to save power, but it does work. I certainly love this extension, and have been using it for a few months now.
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What do you think about this extension? Put your thoughts in the comments below!
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Cheers!
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--------------------------------------------------------------------------------
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via: https://www.ostechnix.com/cpu-power-manager-control-and-manage-cpu-frequency-in-linux/
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作者：[EDITOR][a]
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选题：[lujun9972](https://github.com/lujun9972)
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译者：[runningwater](https://github.com/runningwater)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.ostechnix.com/author/editor/
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[1]: https://www.ostechnix.com/improve-laptop-battery-performance-linux/
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[2]: https://extensions.gnome.org/extension/945/cpu-power-manager/
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CPU 电源管理工具 - Linux 系统中 CPU 主频的控制和管理
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======
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你使用笔记本的话，可能知道 Linux 系统的电源管理做的很不好。虽然有 **TLP**、[**Laptop Mode Tools** 和 **powertop**][1] 这些工具来辅助减少电量消耗，但跟 Windows 和 Mac OS 系统比较起来，电池的整个使用周期还是不尽如意。此外，还有一种降低功耗的办法就是限制 CPU 的频率。这是可行的，然而却需要编写很复杂的终端命令来设置，所以使用起来不太方便。幸好，有一款名为 **CPU Power Manager** 的 GNOME 扩展插件，可以很容易的就设置和管理你的 CPU 主频。GNOME 桌面系统中，CPU Power Manager 使用名为 **intel_pstate** 的功率驱动程序（几乎所有的 Intel CPU 都支持）来控制和管理 CPU 主频。
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使用这个扩展插件的另一个原因是可以减少系统的发热量，因为很多系统在正常使用中的发热量总让人不舒服，限制 CPU 的主频就可以减低发热量。它还可以减少 CPU 和其他组件的磨损。
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### 安装 CPU Power Manager
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首先，进入[**扩展插件主页面**][2]，安装此扩展插件。
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安装好插件后，在 GNOME 顶部栏的右侧会出现一个 CPU 图标。点击图标，会出现安装此扩展一个选项提示，如下示：
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点击**“尝试安装”**按纽，会弹出输入密码确认框。插件需要 root 权限来添加 policykit 规则，进而控制 CPU 主频。下面是弹出的提示框样子：
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输入密码，点击**“认证”**按纽，完成安装。最后在 **/usr/share/polkit-1/actions** 目录下添加了一个名为 **mko.cpupower.setcpufreq.policy** 的 policykit 文件。
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都安装完成后，如果点击右上脚的 CPU 图标，会出现如下所示：
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### 功能特性
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* **查看 CPU 主频:** 显然，你可以通过这个提示窗口看到 CPU 的当前运行频率。
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* **设置最大最小主频:** 使用此扩展，你可以根据列出的最大、最小频率百分比进度条来分别设置其频率限制。一旦设置，CPU 将会严格按照此设置范围运行。
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* **开/关 Turbo Boost:** 这是我最喜欢的功能特性。大多数 Intel CPU 都有 “Turbo Boost” 特性，为了提高额外性能，其中的一个内核为自动进行超频。此功能虽然可以使系统获得更高的性能，但也大大增加功耗。所以，如果不做 CPU 密集运行的话，为节约电能，最好关闭 Turbo Boost 功能。事实上，在我电脑上，我大部分时间是把 Turbo Boost 关闭的。
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* **生成配置文件:** 可以生成最大和最小频率的配置文件，就可以很轻松打开/关闭，而不是每次手工调整设置。
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### 偏好设置
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你也可以通过偏好设置窗口来自定义扩展插件显示形式：
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如你所见，你可以设置是否显示 CPU 主频，也可以设置是否以 **Ghz** 来代替 **Mhz** 显示。
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你也可以编辑和创建/删除配置:
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可以为每个配置分别设置最大、最小主频及开/关 Turbo boost。
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### 结论
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正如我在开始时所说的，Linux 系统的电源管理并不是最好的，许多人总是希望他们的 Linux 笔记本电脑电池能多用几分钟。如果你也是其中一员，就试试此扩展插件吧。为了省电，虽然这是非常规的做法，但有效果。我确实喜欢这个插件，到现在已经使用了好几个月了。
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What do you think about this extension? Put your thoughts in the comments below!你对此插件有何看法呢？请把你的观点留在下面的评论区吧。
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祝贺!
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--------------------------------------------------------------------------------
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via: https://www.ostechnix.com/cpu-power-manager-control-and-manage-cpu-frequency-in-linux/
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作者：[EDITOR][a]
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选题：[lujun9972](https://github.com/lujun9972)
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译者：[runningwater](https://github.com/runningwater)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[a]: https://www.ostechnix.com/author/editor/
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[1]: https://www.ostechnix.com/improve-laptop-battery-performance-linux/
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[2]: https://extensions.gnome.org/extension/945/cpu-power-manager/
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