查看Linux cpu信息
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了查看Linux cpu信息相关的知识,希望对你有一定的参考价值。
在linux系统下可以通过cat /proc/cpuinfo来查看本机上cpu的相关信息,通过processor可以判断逻辑cpu的个数,physical id可以判断物理cpu的个数,通过cpu cores来判断每个cpu内的核数,通过siblings和cpu cores的对比可以判断是否支持超线程。
[[email protected] ~]$ cat /proc/cpuinfo |grep processor|wc -l
32
通过以上命令可以判断本机内的逻辑cpu个数为32
[[email protected] ~]$ cat /proc/cpuinfo |grep physical\ id|sort|uniq
physical id : 0
physical id : 1
通过以上输出可以判断本机内物理cpu个数为2
[[email protected] ~]$ cat /proc/cpuinfo |grep cpu\ cores|uniq
cpu cores : 8
通过以上输出可以判断单个cpu的核数为8
[[email protected] ~]# cat /proc/cpuinfo |grep sibling|uniq
siblings : 16
通过以上输出的结果以及与cpu cores的比较可以确定本机支持超线程。
从以上结果我们最终可以确定本机上拥有2个物理cpu,每个cpu上有8个核,每个核上支持2个线程,从操作系统上通过top或者mpstat等监控命令可以看到有32个逻辑cpu。
写成脚本如下:
#!/bin/bash # Simple print cpu topology # Author: hashlinux function get_nr_processor() { grep ‘^processor‘ /proc/cpuinfo | wc -l } function get_nr_socket() { grep ‘physical id‘ /proc/cpuinfo | awk -F: ‘{ print $2 | "sort -un"}‘ | wc -l } function get_nr_siblings() { grep ‘siblings‘ /proc/cpuinfo | awk -F: ‘{ print $2 | "sort -un"}‘ } function get_nr_cores_of_socket() { grep ‘cpu cores‘ /proc/cpuinfo | awk -F: ‘{ print $2 | "sort -un"}‘ } echo ‘===== CPU Topology Table =====‘ echo echo ‘+--------------+---------+-----------+‘ echo ‘| Processor ID | Core ID | Socket ID |‘ echo ‘+--------------+---------+-----------+‘ while read line; do if [ -z "$line" ]; then printf ‘| %-12s | %-7s | %-9s |\n‘ $p_id $c_id $s_id echo ‘+--------------+---------+-----------+‘ continue fi if echo "$line" | grep -q "^processor"; then p_id=`echo "$line" | awk -F: ‘{print $2}‘ | tr -d ‘ ‘` fi if echo "$line" | grep -q "^core id"; then c_id=`echo "$line" | awk -F: ‘{print $2}‘ | tr -d ‘ ‘` fi if echo "$line" | grep -q "^physical id"; then s_id=`echo "$line" | awk -F: ‘{print $2}‘ | tr -d ‘ ‘` fi done < /proc/cpuinfo echo awk -F: ‘{ if ($1 ~ /processor/) { gsub(/ /,"",$2); p_id=$2; } else if ($1 ~ /physical id/){ gsub(/ /,"",$2); s_id=$2; arr[s_id]=arr[s_id] " " p_id } } END{ for (i in arr) printf "Socket %s:%s\n", i, arr[i]; }‘ /proc/cpuinfo echo echo ‘===== CPU Info Summary =====‘ echo nr_processor=`get_nr_processor` echo "Logical processors: $nr_processor" nr_socket=`get_nr_socket` echo "Physical socket: $nr_socket" nr_siblings=`get_nr_siblings` echo "Siblings in one socket: $nr_siblings" nr_cores=`get_nr_cores_of_socket` echo "Cores in one socket: $nr_cores" let nr_cores*=nr_socket echo "Cores in total: $nr_cores" if [ "$nr_cores" = "$nr_processor" ]; then echo "Hyper-Threading: off" else echo "Hyper-Threading: on" fi echo echo ‘===== END =====‘
参考资料:
http://www.qingran.net/2011/09/numa%E5%BE%AE%E6%9E%B6%E6%9E%84/
http://www.searchtb.com/2012/12/%E7%8E%A9%E8%BD%ACcpu-topology.html
http://kodango.com/cpu-topology
本文出自 “江湖笑笑生” 博客,请务必保留此出处http://hashlinux.blog.51cto.com/9647696/1792411
以上是关于查看Linux cpu信息的主要内容,如果未能解决你的问题,请参考以下文章