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This article is to share with you the content of the sample analysis of stress performance test simulation CPU using 100%. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.

(1) install stress

Decompress: tar-xzvf stress-1.0.4.tar.gz

. / configure

Make

Make install

It is installed in the / usr/local/bin directory by default:

(2) use stress to simulate CPU using 100%

First use top to take a look at CPU usage, basically idle.

Use stress to simulate CPU using 100%:stress-c 8-t 100

Using top again to check the CPU usage, you can see that the us usage is 100%.

Vmstat views pre-and post-run data:

Before simulation:

After simulation:

You can see that the us cpu usage is very high, and the CPU queue has changed from 0 to 8. The value of cs is much larger, but the cs is much smaller. This shows that we did not simulate CPU contention, but only consumed CPU.

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