RHEL 7静止CPU频率缩放

Question

当机器被描绘成：

RHEL6.x

• CPU速度报告所有CPU的全部3.3Ghz速度
• 没有安装cpupowerutils。

RHEL7.x

• CPU速度不同(如下图所示)
• 安装了cpupowerutils。

我检查了以下情况：

• /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor在RHEL7.x.它表示所有CPU的performance。
• 查看kondemand是否使用pgrep -lf kondemand运行。它不是
• 查看cpuspeed服务是否使用service cpuspeed status运行。没有找到

示例RHEL 7.x cpu频率：

grep -E '^cpu MHz' /proc/cpuinfo
cpu MHz         : 3317.273
cpu MHz         : 2028.210
cpu MHz         : 3464.226
cpu MHz         : 3237.480
cpu MHz         : 3455.332
cpu MHz         : 1913.484
cpu MHz         : 3425.167
cpu MHz         : 2592.304
cpu MHz         : 2746.218
cpu MHz         : 2739.128
cpu MHz         : 3202.417
cpu MHz         : 3368.191
cpu MHz         : 2815.441
cpu MHz         : 3165.292
cpu MHz         : 3327.457
cpu MHz         : 2539.066

电力输出：

cpupower frequency-info
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: 1.20 GHz - 3.50 GHz
  available cpufreq governors: performance, powersave
  current policy: frequency should be within 1.20 GHz and 3.50 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency is 1.59 GHz (asserted by call to hardware).
  boost state support:
    Supported: yes
    Active: yes
    3400 MHz max turbo 4 active cores
    3400 MHz max turbo 3 active cores
    3500 MHz max turbo 2 active cores
    3500 MHz max turbo 1 active cores

Answer 1

RHEL7引入了一个名为“调优”的新守护进程，它涉及一系列设置，包括cpu扩展。看看这是不是乱七八糟的

Answer 2

我喜欢做

sudo watch -n 1  cat /sys/devices/system/cpu/cpu*/cpufreq/cpuinfo_cur_freq

在终端窗口中查看cpu速度。

使用tuned，您可以实时更改电源配置文件

tuned-adm  active

tuned-adm  list

# to set the current profile do the following

tuned-adm profile  <choice from the list>

从监视命令中观察核心频率的实时变化。

此外，yum install tuned*和yum install tuna