The CPU governor is a crucial component that regulates the CPU's frequency and power usage. By default, Linux servers often use the "ondemand" governor, which dynamically adjusts the CPU frequency based on system load. However, for maximum performance, switching to the "performance" governor is recommended.

To check your current CPU governor, use the following command:

sudo apt-get install cpufrequtils

Then run:

cpufreq-info

This command will display information about the current CPU frequency scaling settings. Look for the "governor" section to identify the current governor.

To set the CPU governor to "performance," execute the following command:

sudo cpufreq-set -r -g performance

This command ensures that all CPU cores are set to the "performance" governor, optimizing the server for maximum processing power.

If this doesn't work for you, you can try this command:

echo 'performance' | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor

Monitoring CPU Clock Speed:

To monitor the current CPU clock speed in real-time, you can use the following command:

watch -n 0.4 "grep -E '^cpu MHz' /proc/cpuinfo"

This command uses the watch utility to continuously display the CPU clock speed, updating every 0.4 seconds. It provides valuable insights into how the CPU frequency changes under different workloads.

Disabling Multiple Cores:

In specific scenarios, you might want to disable all but one processor core to dedicate resources to a particular task. To achieve this, you can use the following steps:

Identify the number of available CPU cores:

lscpu

Look for the "Core(s) per socket" entry to determine the number of cores per CPU socket.

Disable additional cores (replace [CORE_NUMBER] with the desired core number):

sudo echo 0 > /sys/devices/system/cpu/cpu[7]/online

Keep in mind that you need to leave at least one core for the best performance. Use htop command to see how many cores are working.