linux系统查看机器的cpu？

linux查看机器的cpu

1、查看物理CPU的个数

cat /proc/cpuinfo |grep "physical id"|sort |uniq|wc -l

2、查看逻辑CPU的个数(线程数)

cat /proc/cpuinfo |grep "processor"|wc -l

3、查看CPU是几核

cat /proc/cpuinfo |grep "cores"|uniq

4、查看CPU的主频

cat /proc/cpuinfo |grep MHz|uniq

扩展知识：

uname -a

Linux euis1 2.6.9-55.ELsmp #1 SMP Fri Apr 20 17:03:35 EDT 2007 i686 i686 i386 GNU/Linux
(查看当前操作系统内核信息)

cat /etc/issue | grep Linux

Red Hat Enterprise Linux AS release 4 (Nahant Update 5)
(查看当前操作系统发行版信息)

cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c

      8  Intel(R) Xeon(R) CPU            E5410   @ 2.33GHz
(看到有8个逻辑CPU, 也知道了CPU型号)

cat /proc/cpuinfo | grep physical | uniq -c

      4 physical id      : 0
      4 physical id      : 1
(说明实际上是两颗4核的CPU)

getconf LONG_BIT

32
(说明当前CPU运行在32bit模式下, 但不代表CPU不支持64bit)

cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l

8
(结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit)