#!/usr/bin/bash #filename: cpu-info.sh #this sctrpy only works in a Linux system which has one or more identical physical cpu(s). #逻辑cpu个数 echo -n "logical cpu number in total: " cat /proc/cpuinfo | grep "processor" | wc -l #有些系统没有多核也没有打开多线程， 直接退出 cat /proc/cpuinfo | grep -qi "core id" if [ $? -ne 0 ]; then echo "Warning: No multi-core or hyper-threading is enabled." ecit 0; fi #物理cpu个数 echo -n "physical cpu number in total: " cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l #每个物理cpu上Core的个数（未计入超线程） echo -n "core number in a physical cpu: " core_per_phy_cpu=$(cat /proc/cpuinfo | grep "core id" | sort | uniq | wc -l) echo $core_per_phy_cpu #每个物理cpu中逻辑cpu（可能是core， threads 或both）的个数 echo -n "logical cpu number in a physical cpu: " logical_cpu_per_phy_cpu=$(cat /proc/cpuinfo | grep "siblings" | sort | uniq | awk -F: '{print $2}') echo $logical_cpu_per_phy_cpu #是否打开有超线程 #如果在同一个物理cpu上有两个逻辑cpu具有相同的“core id”， 那么超线程是打开的 #此处根据前面计算的logical_cpu_per_phy_cpu和core_per_phy_cpu的比较来查看超线程 if [ $logical_cpu_per_phy_cpu -gt $core_per_phy_cpu ]; then echo "Hyper threading is enabled." elif [ $logical_cpu_per_phy_cpu -eq $core_per_phy_cpu ]; then echo "Hyper threading is NOT enabled." else echo "Error. There's something wrong." fi