How to check the number of cores of the machine's CPU under Linux

How to check the number of cores of the machine’s CPU under Linux?

Check the machine’s cpu under linux and how many cores it has

Several cpu

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

How many cores does each cpu have (assuming cpu The configuration is the same)

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

cat /proc/cpuinfo | grep processor

1. Check the number of physical CPUs

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

2. Check the number of logical CPUs

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

3. Check the number of cores of the CPU

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

4. Check the CPU clock speed

#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)

Recommended: "Linux Tutorial"

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