linux下CPU信息查询
1.查看逻辑CPU个数:
#cat /proc/cpuinfo |grep "processor"|sort -u|wc -l
24
2.由于有超线程技术有必要查看一下物理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
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
相关知识延伸阅读:
一次性查询所有信息:
#!/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 "*****************************"
执行结果:
#./cpuinfo
****** CPU Information ******
Logical CPU Number : 24
Physical CPU Number : 2
CPU Core Number : 6
HT Number : 2