linux下怎么查看cpu核数

转自：https://blog.youkuaiyun.com/fox_wayen/article/details/80642718

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cpu信息记录在/proc/cpuinfo中，但信息比较多，怎么查出型号，物理cpu个数，逻辑cpu个数呢？

1. 查看CPU型号

[root@localhost ~]# cat /proc/cpuinfo | grep name | sort | uniq
model name	: Intel(R) Core(TM) i7-6500U CPU @ 2.50GHz

2. 查看物理CPU数目

[root@localhost ~]#cat /proc/cpuinfo | grep "physical id"  
physical id	: 0
physical id	: 0
physical id	: 1
physical id	: 1

有0和1两个cpu，或者直接去重计数

[root@localhost ~]# cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l
2

3. 查看核数和逻辑CPU数目

[root@localhost ~]#  cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l
2
[root@localhost ~]#  cat /proc/cpuinfo | grep "core id" | sort | uniq | wc -l
2
[root@localhost ~]#  cat /proc/cpuinfo | grep "processor" | sort | uniq | wc -l
4

4. 如果不想自己算，也可以直接lscpu
   

只有1个cpu，2核，支持超线程，所有有4个逻辑CPU