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)

 

 

 

 

 

如何获得CPU的详细信息:

linux命令:cat /proc/cpuinfo

用命令判断几个物理CPU,几个核等:

逻辑CPU个数:
# cat /proc/cpuinfo | grep "processor" | wc -l

物理CPU个数:
# cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l

每个物理CPU中Core的个数:
# cat /proc/cpuinfo | grep "cpu cores" | wc -l

是否为超线程?
如果有两个逻辑CPU具有相同的”core id”,那么超线程是打开的。

每个物理CPU中逻辑CPU(可能是core, threads或both)的个数:
# cat /proc/cpuinfo | grep "siblings"

转自:http://www.cnblogs.com/xd502djj/archive/2011/02/28/1967350.html 

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