Linux系统下如何查看CPU个数

查看逻辑CPU个数：

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

24

查看物理CPU个数：

#grep "physical id" /proc/cpuinfo|sort -u|wc -l                   

2

#grep "physical id" /proc/cpuinfo|sort -u                   

physical id     : 0

physical id     : 1

查看每个物理CPU内核个数：

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

cpu cores       : 6

每个物理CPU上逻辑CPU个数：

#grep "siblings" /proc/cpuinfo|uniq

siblings        : 12

判断是否开启了抄超线程：

如果多个逻辑CPU的"physical id"和"core id"均相同，说明开启了超线程

或者换句话说

#!/bin/bash

physicalNumber=0

coreNumber=0

logicalNumber=0

HTNumber=0

logicalNumber=$(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 "*****************************"