Отключение службы ondemand

!!!# nano /etc/init.d/ondemand

Для Ubuntu 14.04

# cat /proc/cpuinfo | grep MHz 

# update-rc.d ondemand disable 

# reboot

Для Ubuntu 16.04 (systemd)

# cat /proc/cpuinfo | grep MHz 

# systemctl status ondemand

# systemctl stop ondemand

# systemctl disable ondemand

# reboot

# systemctl status ondemand 

● ondemand.service - LSB: Set the CPU Frequency Scaling governor to "ondemand"
   Loaded: loaded (/etc/init.d/ondemand; bad; vendor preset: enabled)
   Active: inactive (dead)
     Docs: man:systemd-sysv-generator(8)

# cat /proc/cpuinfo | grep MHz
cpu MHz         : 3402.905
cpu MHz         : 3400.000
cpu MHz         : 3400.000
cpu MHz         : 3400.000
cpu MHz         : 3400.415
cpu MHz         : 3400.415
cpu MHz         : 3400.622
cpu MHz         : 3399.792

До:

 После:

Динамическое изменение частоты CPU (cpufreqd)

# apt-get install acpi acpitool lm-sensors cpufreqd cpufrequtils

# acpitool --cpu | grep scaling
 Freq. scaling driver   : intel_pstate

 # acpitool -cpu

# nano  /etc/cpufreqd.conf

; apt-get install lm-sensors

# sensors
asus-isa-0000
Adapter: ISA adapter
cpu_fan:        0 RPM

acpitz-virtual-0
Adapter: Virtual device
temp1:        +27.8°C  (crit = +119.0°C)
temp2:        +29.8°C  (crit = +119.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +29.0°C  (high = +84.0°C, crit = +100.0°C)
Core 0:         +27.0°C  (high = +84.0°C, crit = +100.0°C)
Core 1:         +29.0°C  (high = +84.0°C, crit = +100.0°C)
Core 2:         +25.0°C  (high = +84.0°C, crit = +100.0°C)
Core 3:         +26.0°C  (high = +84.0°C, crit = +100.0°C)

# watch grep \"cpu MHz\" /proc/cpuinfo

# cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors
performance powersave
 

Политика управления частотой процессора «ondemand» и iowait в Ubuntu