CPU 优化建议使用 cpupower 设置 CPU Performance 模式

cd /sys/devices/system/cpu/cpu0/cpufreq/

affected_cpus
bios_limit
cpuinfo_cur_freq
cpuinfo_max_freq
cpuinfo_min_freq
cpuinfo_transition_latency
freqdomain_cpus
related_cpus
scaling_available_frequencies
scaling_available_governors
scaling_cur_freq
scaling_driver
scaling_governor
scaling_max_freq
scaling_min_freq
scaling_setspeed

# 查看当前的调节器
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
conservative

# 查看频率信息
cpupower frequency-info

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: 10.0 us
  hardware limits: 800 MHz - 2.10 GHz
  available frequency steps:  2.10 GHz, 2.10 GHz, 2.00 GHz, 1.90 GHz, 1.80 GHz, 1.70 GHz, 1.60 GHz, 1.50 GHz, 1.40 GHz, 1.30 GHz, 1.20 GHz, 1.10 GHz, 1000 MHz, 900 MHz, 800 MHz
  available cpufreq governors: conservative userspace powersave ondemand performance
  current policy: frequency should be within 800 MHz and 2.10 GHz.
                  The governor "performance" may decide which speed to use
                  within this range.
  current CPU frequency: Unable to call hardware
  current CPU frequency: 2.10 GHz (asserted by call to kernel)
  boost state support:
    Supported: yes
    Active: yes

# CentOS 安装 kernel-tools
yum install kernel-tools

# Ubuntu 安装 CPU 模式无图形化切换器
apt install cpufrequtils

# cpupower 设置 performance
cpupower frequency-set -g performance

# 查看当前的调节器
cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
performance

# 创建 cpupower 配置文件
cat << EOF | sudo tee /etc/sysconfig/cpupower
# See 'cpupower help' and cpupower(1) for more info
CPUPOWER_START_OPTS="frequency-set -g performance"
CPUPOWER_STOP_OPTS="frequency-set -g ondemand"
EOF

# 创建自启动服务
cat << EOF | sudo tee /usr/lib/systemd/system/cpupower.service
[Unit]
Description=Configure CPU power related settings
After=syslog.target

[Service]
Type=oneshot
RemainAfterExit=yes
EnvironmentFile=/etc/sysconfig/cpupower
ExecStart=/usr/bin/cpupower $CPUPOWER_START_OPTS
ExecStop=/usr/bin/cpupower $CPUPOWER_STOP_OPTS

[Install]
WantedBy=multi-user.target
EOF

# 刷新 system 服务
systemctl daemon-reload
systemctl enable cpupower.service

# systemd.service — Service unit configuration
https://www.freedesktop.org/software/systemd/man/systemd.service.html

# 如果遇到以下报错请确认硬件厂商是否做了限制，只能通过 BIOS 调节
[root@sg-gop-10-71-14-91 wangao]# cpupower frequency-set -g performance
Setting cpu: 0
Error setting new values. Common errors:
- Do you have proper administration rights? (super-user?)
- Is the governor you requested available and modprobed?
- Trying to set an invalid policy?
- Trying to set a specific frequency, but userspace governor is not available,
   for example because of hardware which cannot be set to a specific frequency
   or because the userspace governor isn't loaded?