缩放CPU频率

Question

我有一个桌面和一个笔记本电脑存在过热问题，据我所知，从Arch Wiki和这个站点的其他贡献者那里，我必须限制cpu频率来解决这个问题。在这两个系统上，我都在桌面上安装了cpupower和sudo cpupower frequency-info，并返回了AMD Phenom(tm) II X4 955 Processor：

analyzing CPU 0:
  driver: acpi-cpufreq
  CPUs which run at the same hardware frequency: 0
  CPUs which need to have their frequency coordinated by software: 0
  maximum transition latency: 4.0 us
  hardware limits: 800 MHz - 3.20 GHz
  available frequency steps:  3.20 GHz, 2.50 GHz, 2.10 GHz, 800 MHz
  available cpufreq governors: performance schedutil
  current policy: frequency should be within 800 MHz and 3.20 GHz.
                  The governor "schedutil" may decide which speed to use
                  within this range.
  current CPU frequency: 800 MHz (asserted by call to hardware)
  boost state support:
    Supported: no
    Active: no
    Boost States: 0
    Total States: 4
    Pstate-P0:  3200MHz
    Pstate-P1:  2500MHz
    Pstate-P2:  2100MHz
    Pstate-P3:  800MHz

在带有Intel(R) Core(TM) i7-6700HQ CPU @ 2.60GHz的笔记本电脑上返回：

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:  Cannot determine or is not supported.
  hardware limits: 800 MHz - 3.50 GHz
  available cpufreq governors: performance powersave
  current policy: frequency should be within 800 MHz and 3.50 GHz.
                  The governor "powersave" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 1.70 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: yes

在笔记本电脑上，BIOS中没有overclocking这个词，但是在桌面上有一个Overclocking Profile，里面的内容是：

Overclocking Profile 1  [None]
Overclocking Profile 2  [None]
Overclocking Profile 3  [None]
Overclocking Profile 4  [None]
Overclocking Profile 5  [None]
Overclocking Profile 6  [None]

OC Retry Count          [3]

桌面上的lsmod | grep freq返回：

pcc_cpufreq            16384  0
acpi_cpufreq           24576  0

在笔记本电脑上，同样的返回：

pcc_cpufreq            16384  0

所以，在笔记本电脑上，首先，必须：

echo 1 > /sys/devices/system/cpu/intel_pstate/no_turbo

要禁用boost，然后在膝上型计算机和桌面上禁用boost，我必须设置如下限制：

cpupower frequency-set -u 3.00 GHz
cpupower frequency-set -d 2.50 GHz

我必须将3.00 GHz和2.50 GHz用""或''括起来还是用3.00_GHz和2.50_GHz之类的下划线括起来？我必须在桌面的BIOS上做任何事情吗？桌面上的available frequency steps是什么？我应该为桌面的上限和地板选择指定的值吗？看起来在笔记本电脑上没有这样的频率步骤，所以我可以为笔记本电脑选择800到3.50 GHz之间的任何值吗？current CPU frequency: Unable to call hardware对笔记本电脑意味着什么？

Answer 1

“linux中的CPU温度:节流还是读取错误？”在频率缩放方面很有帮助，它实际上解决了这个问题，我在笔记本电脑和台式机上都尝试了最大2.5 GHz，而且笔记本电脑的性能比2.5GHz的台式机要好得多。

笔记本电脑从来没有超过80度，同时渲染16分钟长的视频在kdenlive。另一方面，桌面在渲染时达到临界点：temp1 of PCI Adapter达到85，temp2 of ISA Adapter达到93次。

编辑

在2.1 GHz桌面比笔记本电脑更好！笔记本电脑的核心温度在73摄氏度左右，从未达到75摄氏度，而在桌面上，temp1 of PCI Adapter则在56摄氏度左右，从未达到60摄氏度，temp2 of ISA Adapter在65摄氏度左右，从未达到70摄氏度！

在这一点上，Windows 10和Linux在这些机器上的渲染时间没有差别！在笔记本电脑上唯一的区别是Windows 10在渲染过程中至少会发出一次声音(比如敲击塑料)，我在Linux上没有听到这种声音！但是，如果我禁用intel_pstate，我确实在Linux上听到了同样的声音！