#cat /proc/cpuinfo |grep "processor"|sort -u|wc -l
24

查看物理CPU個數：

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

查看每個物理CPU內核個數：

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

每個物理CPU上邏輯CPU個數：

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

判斷是否開啟了超線程：

如果多個邏輯CPU的"physical id"和"core id"均相同，說明開啟了超線程,或者換句話說

邏輯CPU個數 > 物理CPU個數 * CPU內核數   開啟了超線程
邏輯CPU個數 = 物理CPU個數 * CPU內核數   沒有開啟超線程

一次性查詢所有信息：

#!/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 "*****************************"
 

執行結果：

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

Linux系統下如何查看CPU個數