• linux 下查看机器是cpu是几核的


    几个cpu

    more /proc/cpuinfo |grep "physical id"|uniq|wc -l

    每个cpu是几核(假设cpu配置相同)

    more /proc/cpuinfo |grep "physical id"|grep "0"|wc -l

    cat /proc/cpuinfo | grep processor

    1. 查看物理CPU的个数
    #cat /proc/cpuinfo |grep "physical id"|sort |uniq|wc -l
     
    2. 查看逻辑CPU的个数
    #cat /proc/cpuinfo |grep "processor"|wc -l
     
    3. 查看CPU是几核
    #cat /proc/cpuinfo |grep "cores"|uniq
     
    4. 查看CPU的主频
    #cat /proc/cpuinfo |grep MHz|uniq

    uname -a

    Linux euis1 2.6.9-55.ELsmp #1 SMP Fri Apr 20 17:03:35 EDT 2007 i686 i686 i386 GNU/Linux

    (查看当前操作系统内核信息)

     

    cat /etc/issue | grep Linux

    Red Hat Enterprise Linux AS release 4 (Nahant Update 5)

    (查看当前操作系统发行版信息)

     

    cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c

          8  Intel(R) Xeon(R) CPU            E5410   @ 2.33GHz

    (看到有8个逻辑CPU, 也知道了CPU型号)

     

    cat /proc/cpuinfo | grep physical | uniq -c

          4 physical id      : 0

          4 physical id      : 1

    (说明实际上是两颗4核的CPU)

     

    getconf LONG_BIT

    32

    (说明当前CPU运行在32bit模式下, 但不代表CPU不支持64bit)

     

    cat /proc/cpuinfo | grep flags | grep ' lm ' | wc -l

    8

    (结果大于0, 说明支持64bit计算. lm指long mode, 支持lm则是64bit)

     

     

     

     

     

    如何获得CPU的详细信息:

    linux命令:cat /proc/cpuinfo

    用命令判断几个物理CPU,几个核等:

    逻辑CPU个数:
    # cat /proc/cpuinfo | grep "processor" | wc -l

    物理CPU个数:
    # cat /proc/cpuinfo | grep "physical id" | sort | uniq | wc -l

    每个物理CPU中Core的个数:
    # cat /proc/cpuinfo | grep "cpu cores" | wc -l

    是否为超线程?
    如果有两个逻辑CPU具有相同的”core id”,那么超线程是打开的。

    每个物理CPU中逻辑CPU(可能是core, threads或both)的个数:
    # cat /proc/cpuinfo | grep "siblings"

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  • 原文地址:https://www.cnblogs.com/lxwphp/p/15453224.html
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