There are several ways to view CPU usage in a Linux system, and here are a few of the commonly used ones:
1.Use the top command.
The top command is one of the most commonly used profiling tools in Linux, which can display the resource usage of each process in the system in real time, including CPU, memory, and swap space. In the interface of the top command, press"1"The key can be used to display the resource usage of each process in the form of CPU usage. Press"h"key to enable the tree view of the top command to view the resource usage of each process in a more intuitive way.
2.Use the htop command.
The htop command is an enhanced version of the top command, which provides richer functions and a more user-friendly interface. In the interface of the htop command, you can directly view the usage of each CPU core, and you can sort and filter processes according to the CPU usage. At the same time, the htop command also supports custom colors and themes, which can be configured according to personal preferences.
3.Use the mpstat command.
The mpstat command is a tool in the sysstat package that can be used to monitor the performance status of a multi-core CPU. The mpstat command can display information such as the occupancy of each CPU core, the length of the running queue, and the number of interruptions, and can be sorted and filtered by CPU usage. To use the mpstat command, you need to install the sysstat package and configure it on the system.
4.Use the vmstat command.
The vmstat command can be used to monitor the virtual memory status of the system, including processes, memory, paging, block IOs, traps, and CPU activity. In the vmstat command interface, press"1"The key can be used to display the resource usage of each process in the form of CPU usage. At the same time, the vmstat command can also display information such as the average load of the system and the length of the running queue.
The above are several commonly used methods to check CPU usage in Linux systems, and you can choose different tools to use according to different needs and scenarios.