bash-控制要强调多少 cpu/vm/io [关闭]

Question

我创建了一个脚本来强调虚拟机的 cpu、vm 和 io 并将结果写入文件。我以这样一种方式编写了脚本，它可以读取用户输入他们希望运行每个测试的时间（以秒为单位）。但是，我不得不将 cpu 等的数量硬编码为 4。如何更改此脚本，以便用户可以选择要强调的 cpu/vm/io 数量以及多长时间？

脚本如下：

#!/bin/bash
#
# Script to get stress statistics#

echo "Enter the number of intervals (seconds) for running the stress statistics:"


read seconds_to_run
# the variable "seconds_to_run" now has the value entered by keyboard

# The stress option chosen will be output to the corresponding file and timestamped with today's date.
out_cpufilename="/tmp/stress_cpu_stat_"$( date +"%B.%d" )
out_vmfilename="/tmp/stress_vm_stat_"$( date +"%B.%d" )
out_iofilename="/tmp/stress_io_stat_"$( date +"%B.%d" )


while true; do
    clear
    echo "*******************************"
    echo "* Choose from the following: *"
    echo "*******************************"
    echo "* [1] To stress cpu statistics *"
    echo "* [2] To view stress vm statistics *"
    echo "* [3] To view stress io statistics *"
    echo "Press A to quit."
    echo "************************"
    echo -n "Enter your menu choice [1-3]: "

    read choice


    case  $choice in    
        1) echo "stress cpu statistics"
            stress -c 4 -t $choice |tee $out_cpufilename 
            echo "This file will be saved to $out_cpufilename"
            sleep 3 ;;

        2) echo "stress cpu statistics"
            stress -m 4 -t $choice |tee $out_vmfilename 
            echo "This file will be saved to $out_vmfilename"
            sleep 3 ;;

        3) echo "stress cpu statistics"
            stress -i 4 -t $choice |tee $out_iofilename 
            echo "This file will be saved to $out_iofilename"
            sleep 3 ;;


        A) #Quit option
            echo You have chosen to quit.
            exit;;   

        *) #Wildcard option in case user enters an invalid option such as "e"
            echo Invalid choice, please make another choice
            sleep 3;;


    esac
done

Answer 1

grep -c ^processor /proc/cpuinfo

会给你机器的核心数

Answer 2

你只需要将核心数读入一个变量：

echo -n "Number of cores: "
read cores

将此添加到您认为最合适的位置。要使用变量而不是硬编码值，请将每次出现的 4 替换为 "$cores"。

如果您选择放弃 Java 并成为 Bash 爱好者的一个小提示：为了避免空格和特殊字符的典型问题，最好始终将 bash 变量括在引号中 ("$cores" ) 或花括号 (${cores})。