How to use shell to write a script that takes up CPU in linux

This article will explain in detail how to use shell in linux to write a script that takes up CPU. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Use the scene:

The virtual machine resources applied to the company are more convenient for their own work, because they need to recycle the smaller basis. Now write a script to let the CPU run full.

First of all, take a look at how many logical CPU there are.

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

As you can see in the picture above, there are four. I am now running more than two.

The script is as follows: #! / bin/bash# filename killcpu.shendless_loop () {echo-ne "iBoth truedoi=i+100;i=100done" | / bin/bash &} if [$#! = 1]; thenecho "USAGE: $0" exit 1 in for I in `seq $1`doendless _ looppid_array [$] = $!; donefor i in "${pid_array [@]}"; doecho 'kill' $I';'; done

The parameter added after the use is the number of logical CPU that needs to run full. Here I run 2.

After executing the script, you can see that the left side of the image above has been monitored to be full of 2 CPU.

The script automatically outputs two process numbers, one for each CPU.

In the later stage, you can also view the high occupied PID number in TOP, and manually kill it as shown below.

Kill the process.

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