linux 下查看机器是cpu是几核的

几个cpu

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

每一个cpu是几核（假设cpu配置相同）

more /proc/cpuinfo |grep "physical id"|grep "0"|wc -l

cat /proc/cpuinfo | grep processor

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
#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

 

# uname -a

Linux euis1 2.6.9-55.ELsmp #1 SMP Fri Apr 20 17:03:35 EDT 2007 i686 i686 i386 GNU/Linux

(查看当前操做系统内核信息)

# cat /etc/issue | grep Linux

Red Hat Enterprise Linux AS release 4 (Nahant Update 5)

(查看当前操做系统发行版信息)

# 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

(说明其实是两颗4核的CPU)

# getconf LONG_BIT

32

(说明当前CPU运行在32bit模式下, 但不表明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)