Linux system CPU uses the 100% command

For i in ' SEQ 1 $ (cat/proc/cpuinfo |grep "Physical id" |wc-l) '; Do DD If=/dev/zero Of=/dev/null & Done

Description

Cat/proc/cpuinfo |grep "Physical ID" | Wc-l can get the number of CPUs, which we represent as N.

SEQ 1 n is used to generate numbers between 1 and N

For i in ' seq 1 N '; is the loop execution command, from 1 to n

DD If=/dev/zero Of=/dev/null Executes the DD command, output to/dev/null, actually consumes only CPU, no IO operation.

Due to the continuous execution of n (n is the number of CPUs) of the DD command, and the usage rate is 100%, then the scheduler will dispatch each DD command on a different CPU processing.

Finally, all CPU usage 100%

Linux system CPU uses the 100% command