How to check the number of CPU bits in Linux

How to check the number of CPU bits in Linux: 1. Use the "getconf LONG_BIT" command or the "getconf WORD_BIT" command to check. getconf itself is an ELF executable file used to obtain system information; 2. Use "cat / proc/cpuinfo" command, which can be used to view cpu information.

#The operating environment of this tutorial: linux7.3 system, Dell G3 computer.

How to check the number of bits of the CPU in Linux

Check the number of bits in the Linux operating system

1. getconf LONG_BIT If it is 32, it means 32 bits

getconf itself is an ELF executable file, used to obtain system information

Usage

getconf -a can obtain all system information

For this command, remember Just use a few commonly used information acquisition methods

getconf PAGE_SIZE Check the system memory paging size

getconf LONG_BIT The easiest way to check whether Linux is 32-bit or 64-bit

The example is as follows ：

[root@db ~]# getconf LONG_BIT
32
[root@db ~]# getconf WORD_BIT
32

2. You can also view it through cat /proc/cpuinfo

In the Linux system, the /proc directory provides many files to display the system software. hardware information. If you want to know the CPU provider and related configuration information in the system, you can view /proc/cpuinfo. For example, we want to obtain information such as the number of physical CPUs, the number of cores of each physical CPU, and whether hyper-threading is enabled.

First of all, we must understand the concepts of physical CPU, core number, and logical CPU number:

• Physical CPU number (physical id): The number of CPUs actually inserted on the motherboard, Several of them can be counted by not repeating the physical ID.

• CPU cores: The number of chipsets that can process data on a single CPU, such as dual-core, quad-core, etc.
  

• Number of logical CPUs: Generally speaking, logical CPU = number of physical CPUs × number of cores

Logical CPU = number of physical CPUs × Number of cores per CPU * 2 # Indicates that the server's CPU supports hyper-threading technology (simply put, it allows 1 core in the processor to become 2 cores in the operating system. In this way, the execution resources available to the operating system are doubled (This greatly improves the overall performance of the system)

The file /proc/cpuinfo shows the type of processor the system is running on, including the number of CPUs present. This is an example output of cat /proc/cpuinfo for your system.

Recommended learning: Linux video tutorial

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