查看cpu的个数 linux

最新推荐文章于 2025-12-31 19:19:25 发布

转载最新推荐文章于 2025-12-31 19:19:25 发布 · 143 阅读

文章标签：

#数据库 #awk

本文介绍如何通过Linux命令行查询CPU逻辑个数、物理个数、内核个数及是否开启超线程，并展示了如何获取内存大小。同时，提供了一个脚本实现一键查询这些信息。

查看逻辑CPU个数：

#cat /proc/cpuinfo |grep "processor"|sort -u|wc -l
24

查看物理CPU个数：

#grep "physical id" /proc/cpuinfo|sort -u|wc -l
2

#grep "physical id" /proc/cpuinfo|sort -u
physical id     : 0
physical id     : 1

查看每个物理CPU内核个数：

#grep "cpu cores" /proc/cpuinfo|uniq
cpu cores : 6

每个物理CPU上逻辑CPU个数：

#grep "siblings" /proc/cpuinfo|uniq
siblings : 12

判断是否开启了抄超线程：

如果多个逻辑CPU的"physical id"和"core id"均相同，说明开启了超线程

或者换句话说

逻辑CPU个数 > 物理CPU个数 * CPU内核数开启了超线程

逻辑CPU个数 = 物理CPU个数 * CPU内核数没有开启超线程

一次性查询所有信

#!/bin/bash
physicalNumber=0
coreNumber=0
logicalNumber=0
HTNumber=0
logicalNumber=$(grep "processor" /proc/cpuinfo|sort -u|wc -l)
physicalNumber=$(grep "physical id" /proc/cpuinfo|sort -u|wc -l)
coreNumber=$(grep "cpu cores" /proc/cpuinfo|uniq|awk -F':' '{print $2}'|xargs)
HTNumber=$((logicalNumber / (physicalNumber * coreNumber)))
mem=`cat /proc/meminfo |grep MemTotal|awk '{print $2}'`
info=`cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c`
let "Memmm=$mem/1024"
echo "判断是否开启了抄超线程："
echo "逻辑CPU个数 > 物理CPU个数 * CPU内核数开启了超线程"
echo "逻辑CPU个数 = 物理CPU个数 * CPU内核数没有开启超线程"
echo "****** CPU Information ******"
echo "cpu 型号： $info"
echo "逻辑cpu个数 : ${logicalNumber}"
echo "物理cpu个数 : ${physicalNumber}"
echo "每个物理CPU内核个数 : ${coreNumber}"
echo "(是否支持超线程大于1表示支持) : ${HTNumber}"
echo "内存大小：${Memmm} M"
echo "*****************************"
[root@HaoDai_App_DB01 soft]# sh cpu.sh
判断是否开启了抄超线程：
逻辑CPU个数 > 物理CPU个数 * CPU内核数开启了超线程
逻辑CPU个数 = 物理CPU个数 * CPU内核数没有开启超线程
****** CPU Information ******
cpu 型号： 40 Intel(R) Xeon(R) CPU E5-2680 v2 @ 2.80GHz
逻辑cpu个数 : 40
物理cpu个数 : 2
每个物理CPU内核个数 : 10
(是否支持超线程大于1表示支持) : 2
内存大小：64375 M
*****************************

[root@HaoDai_App_DB01 soft]# top
top - 14:37:59 up 191 days, 10:27, 1 user, load average: 4.03, 4.19, 4.08
Tasks: 598 total, 1 running, 597 sleeping, 0 stopped, 0 zombie
Cpu(s): 11.8%us, 0.2%sy, 0.0%ni, 87.9%id, 0.0%wa, 0.0%hi, 0.1%si, 0.0%st
Mem: 65920980k total, 64673528k used, 1247452k free, 280968k buffers
Swap: 15736828k total, 0k used, 15736828k free, 44248948k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3135 mysql 20 0 33.1g 12g 9500 S 476.6 20.6 348994:11 mysqld ---cpu利用率达到476.6%表示用到了4.7个内核
33859 mysql 20 0 27.5g 4.4g 9224 S 2.3 7.0 3197:28 mysqld
4 root 20 0 0 0 0 S 0.3 0.0 9:34.50 ksoftirqd/0
165 root 20 0 0 0 0 S 0.3 0.0 8:55.42 events/2
186 root 20 0 0 0 0 S 0.3 0.0 12:02.53 events/23

快捷建：top之后在按1 可以查看每个cpu的使用率

[root@bj150 soft]# top
top - 14:42:38 up 191 days, 10:32, 1 user, load average: 2.81, 4.86, 5.80
Tasks: 647 total, 1 running, 646 sleeping, 0 stopped, 0 zombie
Cpu0 : 42.6%us, 21.5%sy, 0.0%ni, 32.3%id, 0.0%wa, 0.0%hi, 3.6%si, 0.0%st
Cpu1 : 8.6%us, 3.0%sy, 0.0%ni, 88.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu2 : 17.4%us, 13.7%sy, 0.0%ni, 68.9%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu3 : 1.7%us, 1.7%sy, 0.0%ni, 96.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu4 : 25.8%us, 17.9%sy, 0.0%ni, 56.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu5 : 0.7%us, 0.7%sy, 0.0%ni, 98.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu6 : 16.6%us, 9.9%sy, 0.0%ni, 73.5%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu7 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu8 : 7.3%us, 4.0%sy, 0.0%ni, 88.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu9 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu10 : 8.9%us, 5.6%sy, 0.0%ni, 85.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu11 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu12 : 2.3%us, 3.7%sy, 0.0%ni, 94.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu13 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu14 : 4.3%us, 0.7%sy, 0.0%ni, 95.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu15 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu16 : 44.4%us, 19.9%sy, 0.0%ni, 35.8%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu17 : 9.3%us, 0.3%sy, 0.0%ni, 90.4%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu18 : 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu19 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu20 : 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu21 : 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu22 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu23 : 1.0%us, 0.0%sy, 0.0%ni, 99.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu24 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu25 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu26 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu27 : 9.0%us, 12.3%sy, 0.0%ni, 78.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu28 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu29 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu30 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Cpu31 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 65920828k total, 30687964k used, 35232864k free, 153324k buffers
Swap: 16777208k total, 21180k used, 16756028k free, 7907276k cached

二、内存大小
[root@vm34 ~]# cat /proc/meminfo |grep MemTotal
MemTotal: 20472896 kB

[root@vm34 ~]# free -m
total used free shared buffers cached
Mem: 19993 19799 194 0 677 17085
-/+ buffers/cache: 2036 17956
Swap: 16383 0 16383

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转载于:http://blog.itpub.net/29096438/viewspace-1749307/