Linux系統下如何檢視CPU個數

檢視邏輯CPU個數：

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

24

檢視實體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

檢視每個實體CPU核心個數：

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

cpu cores       : 6

每個實體CPU上邏輯CPU個數：

#grep "siblings" /proc/cpuinfo|uniq

siblings        : 12

判斷是否開啟了抄超線程：

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

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