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This article introduces the relevant knowledge of "how to check several cpu in linux". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

In linux, you can use the grep command to view several cpu, which is used to find qualified strings in the file. When this command is used with the "/ proc/cpuinfo" file, you can query the number of cpu with the syntax of "grep-c 'processor' / proc/cpuinfo".

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

How does linux check how many cpu there are?

First of all, I'll show you the case of a CPU, which is the simplest.

The information of CPU is stored in / proc/cpuinfo, as shown in the following figure. Physical id represents the number of CPU, the number starts from 0, and cpu cores represents the number of cores. You can see that it is a 1-core CPU, that is, the number of CPU is 1.

After we know that the CPU information stores the file, we can simply use grep-c 'processor' / proc/cpuinfo to count the number of CPU.

Let's demonstrate the query of multiple CPU. Let's take a look at / proc/cpuinfo to see if the cpu information is different. It can be seen that there are 2 4-core CPU, that is, the number of CPU is 8.

Similarly, use grep-c 'processor' / proc/cpuinfo to count the number of CPU.

You can also query the number of CPU, the number of cores, and the total number of logical CPU separately as follows.

Note: total number of logical CPU = number of physical CPU * number of cores per physical CPU * number of hyperthreads

Query the number of CPU

Cat / proc/cpuinfo | grep "physical id" | sort | uniq | wc-l

Query core:

Cat / proc/cpuinfo | grep "cpu cores" | uniq

Total number of query logic CPU:

Cat / proc/cpuinfo | grep "processor" | wc-l

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