在linux系統下能夠經過cat /proc/cpuinfo來查看本機上cpu的相關信息,經過processor能夠判斷邏輯cpu的個數,physical id能夠判斷物理cpu的個數,經過cpu cores來判斷每一個cpu內的核數,經過siblings和cpu cores的對比能夠判斷是否支持超線程。
html
[test@hash1 ~]$ cat /proc/cpuinfo |grep processor|wc -llinux
32bash
經過以上命令能夠判斷本機內的邏輯cpu個數爲32socket
[test@hash1 ~]$ cat /proc/cpuinfo |grep physical\ id|sort|uniqide
physical id : 0ui
physical id : 1spa
經過以上輸出能夠判斷本機內物理cpu個數爲2操作系統
[test@hash1 ~]$ cat /proc/cpuinfo |grep cpu\ cores|uniq.net
cpu cores : 8線程
經過以上輸出能夠判斷單個cpu的核數爲8
[root@hash1 ~]# cat /proc/cpuinfo |grep sibling|uniq
siblings : 16
經過以上輸出的結果以及與cpu cores的比較能夠肯定本機支持超線程。
從以上結果咱們最終能夠肯定本機上擁有2個物理cpu,每一個cpu上有8個核,每一個核上支持2個線程,從操做系統上經過top或者mpstat等監控命令能夠看到有32個邏輯cpu。
寫成腳本以下:
#!/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 ====='
參考資料:
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