物理CPU个数：物理cpu就是主板上的cpu数量，可通过不重复的physical id判断

    1. ejuoajy5x6zakvmZ:~$ cat /proc/cpuinfo | grep "physical id"
    2. physical id     : 0
    3. physical id     : 0
    4. physical id     : 0
    5. physical id     : 0

    逻辑CPU个数：就是processor

    1. 18kejuoajy5x6zakvmZ:~$ cat /proc/cpuinfo | grep "processor"
    2. processor       : 0
    3. processor       : 1
    4. processor       : 2
    5. processor       : 3
    7. oajy5x6zakvmZ:~$ cat /proc/cpuinfo | grep "processor" | wc -l
    8. 4

    CPU核心数：如双核、四核等 （cpu cores 核心）

    1. jy5x6zakvmZ:~$ cat /proc/cpuinfo | grep "cpu cores"
    2. cpu cores       : 2
    3. cpu cores       : 2
    4. cpu cores       : 2
    5. cpu cores       : 2
    1. 5x6zakvmZ:~$ lscpu
    2. Architecture:        x86_64
    3. CPU op-mode(s):      32-bit, 64-bit
    4. Byte Order:          Little Endian
    5. CPU(s):              4    # 逻辑cpu个数
    6. On-line CPU(s) list: 0-3
    7. Thread(s) per core:  2    # 每个cpu核心数
    8. Core(s) per socket:  2    # 物理cpu
    9. Socket(s):           1
    10. NUMA node(s):        1
    11. Vendor ID:           GenuineIntel
    12. CPU family:          6
    13. Model:               85
    14. Model name:          Intel(R) Xeon(R) Gold 6149 CPU @ 3.10GHz
    15. Stepping:            4
    16. CPU MHz:             3100.000
    17. BogoMIPS:            6200.00
    18. Hypervisor vendor:   KVM
    19. Virtualization type: full
    20. L1d cache:           32K
    21. L1i cache:           32K
    22. L2 cache:            1024K
    23. L3 cache:            22528K
    24. NUMA node0 CPU(s):   0-3

    总的逻辑Cpu = 物理Cpu个数 * 每个物理cpu核心数

    如果开启了超线程，总的逻辑cpu就是没开超线程时总的逻辑cpu个数的两倍