How to view CPU count under Linux system

To view the number of logical CPUs:

#cat /proc/cpuinfo |grep "processor"|sort -u|wc -l24

To view the number of physical CPUs:

#grep "physical id" /proc/cpuinfo|sort -u|wc -l                   2#grep "physical id" /proc/cpuinfo|sort -u                   physical id     : 0physical id     : 1

To view the number of cores per physical CPU:

#grep "cpu cores" /proc/cpuinfo|uniqcpu cores       : 6

Number of logical CPUs on each physical CPU:

#grep "siblings" /proc/cpuinfo|uniqsiblings        : 12

Determine if hyper-threading is turned on:

If the "Physical ID" and "core ID" of multiple logical CPUs are the same, the description turns on Hyper-threading, or in other words

逻辑CPU个数 > 物理CPU个数 * CPU内核数   开启了超线程逻辑CPU个数 = 物理CPU个数 * CPU内核数   没有开启超线程

Check all information at once:

#!/bin/bashphysicalNumber=0coreNumber=0logicalNumber=0HTNumber=0logicalNumber=$(grep "processor" /proc/cpuinfo|sort -u|wc -l)physicalNumber=$(grep "physical id" /proc/cpuinfo|sort -u|wc -l)coreNumber=$(grep "cpu cores" /proc/cpuinfo|uniq|awk -F‘:‘ ‘{print $2}‘|xargs)HTNumber=$((logicalNumber / (physicalNumber * coreNumber)))echo "****** CPU Information ******"echo "Logical CPU Number  : ${logicalNumber}"echo "Physical CPU Number : ${physicalNumber}"echo "CPU Core Number     : ${coreNumber}"echo "HT Number           : ${HTNumber}"echo "*****************************"

Execution Result:

#./cpuinfo  ****** CPU Information ******Logical CPU Number  : 24Physical CPU Number : 2CPU Core Number     : 6HT Number           : 2*****************************

How to view CPU count under Linux system