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