作者:梦魇心芽_932 | 来源:互联网 | 2017-10-25 21:37
文章标题:用Shell脚本获取CPU拓扑关系。Linux是中国IT实验室的一个技术频道。包含桌面应用,Linux系统管理,内核研究,嵌入式系统和开源等一些基本分类
准确说这不是一个问题,因为地球人都知道cat /proc/cpuinfo获取CPU信息。但是,你能从那一大片输出里面立马看出来是多个物理CPU呢,还是多核呢,还是超线程之类的东东么?
本文给出一个脚本,通过分析proc来给出一个清晰的答案,本人写的脚本通用性可能比较差,大家根据情况进行修改,基本上在偶这里没啥问题。
先说点基础:
/proc/cpuinfo里面:
processor表示逻辑CPU号(核或线程)
core id表示CPU核号
physical id表示物理CPU号
脚本如下:
cpu_p=`cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l` cpu_c=`cat /proc/cpuinfo | grep "core id" | uniq | wc -l` cpu_l=`cat /proc/cpuinfo | grep "processor" | wc -l`
c_p=`expr $cpu_c / $cpu_p` l_p=`expr $cpu_l / $cpu_p` t_c=`expr $cpu_l / $cpu_c`
echo "Physical CPU Count: $cpu_p" echo "CPU Core Count : $cpu_c" echo "Logical CPU Count: $cpu_l"
echo "$c_p cores per physical CPU" echo "$l_p logical CPUs per physical CPU" echo "$t_c threads per core"
if [ $c_p -eq 1 ]; then echo "Your CPU is unicore" else echo "Your CPU is multicore" fi
if [ $t_c -eq 1 ]; then echo "Your CPU isn\'t of HT" else echo "Your CPU is of HT" fi
echo "You have $cpu_p CPUs, each CPU has $c_p cores, each core has $t_c threads. In summary $cpu_c cores, $cpu_l threads." |
下面是在俺这里的运行结果:
《SCRIPT》