linux 下查看機器是cpu是幾核的

幾個cpu

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

每一個cpu是幾核（假設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的個數
#cat /proc/cpuinfo |grep "physical id"|sort |uniq|wc -l
 
2. 查看邏輯CPU的個數
#cat /proc/cpuinfo |grep "processor"|wc -l
 
3. 查看CPU是幾核
#cat /proc/cpuinfo |grep "cores"|uniq
 
4. 查看CPU的主頻
#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

(查看當前操做系統內核信息)

# cat /etc/issue | grep Linux

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

(查看當前操做系統發行版信息)

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

      8  Intel(R) Xeon(R) CPU            E5410   @ 2.33GHz

(看到有8個邏輯CPU, 也知道了CPU型號)

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

      4 physical id      : 0

      4 physical id      : 1

(說明其實是兩顆4核的CPU)

# getconf LONG_BIT

32

(說明當前CPU運行在32bit模式下, 但不表明CPU不支持64bit)

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

8

(結果大於0, 說明支持64bit計算. lm指long mode, 支持lm則是64bit)