1. [root@prod-lsync-server01 ~]# lscpu 
    2. Architecture:          x86_64
    3. CPU op-mode(s):        32-bit, 64-bit
    4. Byte Order:            Little Endian
    5. CPU(s):                8
    6. On-line CPU(s) list:   0-3
    7. Off-line CPU(s) list:  4-7
    8. Thread(s) per core:    0
    9. Core(s) per socket:    1
    10. Socket(s):             5
    11. NUMA node(s):          1
    12. Vendor ID:             GenuineIntel
    13. CPU family:            6
    14. Model:                 85
    15. Model name:            Intel(R) Xeon(R) Gold 6132 CPU @ 2.60GHz
    16. Stepping:              4
    17. CPU MHz:               2593.908
    18. BogoMIPS:              5187.81
    19. Hypervisor vendor:     KVM
    20. Virtualization type:   full
    21. L1d cache:             32K
    22. L1i cache:             32K
    23. L2 cache:              4096K
    24. L3 cache:              16384K
    25. NUMA node0 CPU(s):     0-3
    26. Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon rep_good nopl xtopology eagerfpu pni pclmulqdq ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm mpx avx512f avx512dq rdseed adx smap clflushopt clwb avx512cd avx512bw avx512vl xsaveopt xsavec xgetbv1 arat
    27. [root@prod-lsync-server01 ~]#
    1. [root@prod-lsync-server01 ~]# 
    2. [root@prod-lsync-server01 ~]# top
    3. top - 10:35:55 up 37 days, 17:06,  1 user,  load average: 73.73, 71.55, 68.63
    4. Tasks: 416 total,  71 running, 345 sleeping,   0 stopped,   0 zombie
    5. %Cpu0  : 95.6 us,  2.7 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  1.8 si,  0.0 st
    6. %Cpu1  : 97.3 us,  2.7 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    7. %Cpu2  : 95.5 us,  4.5 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    8. %Cpu3  : 99.1 us,  0.9 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    9. KiB Mem : 16234332 total,   171388 free,   714656 used, 15348288 buff/cache
    10. KiB Swap:  8388604 total,  7771756 free,   616848 used. 14681436 avail Mem 
    12.    PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                  
    13.   7885 root      20   0  201704   5400   1248 R   8.8  0.0   5:04.41 rsync                                                    
    14.  58134 root      20   0  201704   4344   1220 R   8.8  0.0   0:18.61 rsync                                                    
    15.   7653 root      20   0  201704   5412   1248 R   8.0  0.0   5:03.31 rsync

    image.png
    image.png

    cpu在线扩容后 不立即生效

    1. [root@prod-lsync-server01 ~]# cd /sys/devices/system/cpu/
    2. cpu0/      cpu1/      cpu2/      cpu3/      cpu4/      cpu5/      cpu6/      cpu7/      cpuidle/   microcode/ power/
    3. [root@prod-lsync-server01 ~]# cd /sys/devices/system/cpu/
    4. [root@prod-lsync-server01 cpu]# cat cpu0/
    5. cat: cpu0/: Is a directory
    6. [root@prod-lsync-server01 cpu]# ls 
    7. cpu0  cpu2  cpu4  cpu6  cpuidle   kernel_max  modalias   offline  possible  present
    8. cpu1  cpu3  cpu5  cpu7  isolated  microcode   nohz_full  online   power     uevent
    9. [root@prod-lsync-server01 cpu]# cd cpu0/
    10. [root@prod-lsync-server01 cpu0]# ls 
    11. cache  crash_notes  crash_notes_size  driver  firmware_node  microcode  node0  online  power  subsystem  topology  uevent
    12. [root@prod-lsync-server01 cpu0]# cat online 
    13. 1
    14. [root@prod-lsync-server01 cpu0]#

    手动处理：

    1. [root@prod-lsync-server01 ~]# cd   /sys/devices/system/cpu/
    2. [root@prod-lsync-server01 cpu]# 
    3. [root@prod-lsync-server01 cpu]# ls -l
    4. total 0
    5. drwxr-xr-x 6 root root    0 Oct 18 17:24 cpu0
    6. drwxr-xr-x 6 root root    0 Oct 18 17:24 cpu1
    7. drwxr-xr-x 6 root root    0 Oct 18 17:24 cpu2
    8. drwxr-xr-x 6 root root    0 Oct 18 17:24 cpu3
    9. drwxr-xr-x 3 root root    0 Nov 25 10:27 cpu4
    10. drwxr-xr-x 3 root root    0 Nov 25 10:27 cpu5
    11. drwxr-xr-x 3 root root    0 Nov 25 10:27 cpu6
    12. drwxr-xr-x 3 root root    0 Nov 25 10:27 cpu7
    13. drwxr-xr-x 2 root root    0 Nov 25 10:33 cpuidle
    14. -r--r--r-- 1 root root 4096 Nov 25 10:33 isolated
    15. -r--r--r-- 1 root root 4096 Nov 25 10:25 kernel_max
    16. drwxr-xr-x 2 root root    0 Nov 25 10:33 microcode
    17. -r--r--r-- 1 root root 4096 Nov 25 10:33 modalias
    18. -r--r--r-- 1 root root 4096 Nov 25 10:33 nohz_full
    19. -r--r--r-- 1 root root 4096 Nov 25 10:33 offline
    20. -r--r--r-- 1 root root 4096 Oct 18 09:24 online
    21. -r--r--r-- 1 root root 4096 Nov 25 10:25 possible
    22. drwxr-xr-x 2 root root    0 Nov 25 10:33 power
    23. -r--r--r-- 1 root root 4096 Nov 25 10:25 present
    24. -rw-r--r-- 1 root root 4096 Nov 25 10:33 uevent
    25. [root@prod-lsync-server01 cpu]# cd cpu0/
    26. [root@prod-lsync-server01 cpu0]# ls -l
    27. total 0
    28. drwxr-xr-x 6 root root    0 Nov 25 10:25 cache
    29. -r-------- 1 root root 4096 Oct 18 09:25 crash_notes
    30. -r-------- 1 root root 4096 Oct 18 09:25 crash_notes_size
    31. lrwxrwxrwx 1 root root    0 Nov 25 10:34 driver -> ../../../../bus/cpu/drivers/processor
    32. lrwxrwxrwx 1 root root    0 Nov 25 10:34 firmware_node -> ../../../LNXSYSTM:00/device:00/ACPI0010:00/LNXCPU:00
    33. drwxr-xr-x 2 root root    0 Nov 25 10:34 microcode
    34. lrwxrwxrwx 1 root root    0 Nov 25 10:34 node0 -> ../../node/node0
    35. -rw-r--r-- 1 root root 4096 Nov 25 10:34 online
    36. drwxr-xr-x 2 root root    0 Nov 25 10:34 power
    37. lrwxrwxrwx 1 root root    0 Nov 25 10:34 subsystem -> ../../../../bus/cpu
    38. drwxr-xr-x 2 root root    0 Nov 25 10:25 topology
    39. -rw-r--r-- 1 root root 4096 Nov 25 10:34 uevent
    40. [root@prod-lsync-server01 cpu0]# 
    41. [root@prod-lsync-server01 cpu0]# cd 
    42. [root@prod-lsync-server01 ~]# 
    43. [root@prod-lsync-server01 ~]# echo 1 > /sys/devices/system/cpu/cpu0/online
    44. [root@prod-lsync-server01 ~]# echo 1 > /sys/devices/system/cpu/cpu1/online
    45. [root@prod-lsync-server01 ~]# echo 1 > /sys/devices/system/cpu/cpu2/online
    46. [root@prod-lsync-server01 ~]# echo 1 > /sys/devices/system/cpu/cpu3/online
    47. [root@prod-lsync-server01 ~]# echo 1 > /sys/devices/system/cpu/cpu4/online
    48. [root@prod-lsync-server01 ~]# echo 1 > /sys/devices/system/cpu/cpu5/online
    49. [root@prod-lsync-server01 ~]# echo 1 > /sys/devices/system/cpu/cpu6/online
    50. [root@prod-lsync-server01 ~]# echo 1 > /sys/devices/system/cpu/cpu7/online
    51. [root@prod-lsync-server01 ~]# top
    52. top - 10:46:04 up 37 days, 17:16,  1 user,  load average: 64.91, 66.73, 67.72
    53. Tasks: 420 total,  63 running, 357 sleeping,   0 stopped,   0 zombie
    54. %Cpu0  : 99.1 us,  0.9 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    55. %Cpu1  : 98.1 us,  1.9 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    56. %Cpu2  : 96.3 us,  1.9 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  1.9 si,  0.0 st
    57. %Cpu3  : 98.1 us,  1.9 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    58. %Cpu4  : 99.1 us,  0.9 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    59. %Cpu5  : 99.1 us,  0.9 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    60. %Cpu6  : 99.1 us,  0.9 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    61. %Cpu7  : 97.2 us,  2.8 sy,  0.0 ni,  0.0 id,  0.0 wa,  0.0 hi,  0.0 si,  0.0 st
    62. KiB Mem : 16234332 total,   158788 free,   705512 used, 15370032 buff/cache
    63. KiB Swap:  8388604 total,  7758712 free,   629892 used. 14692148 avail Mem 
    65.    PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND                                                  
    66.   7885 root      20   0  201704   5400   1248 R  15.7  0.0   5:45.74 rsync                                                    
    67.  56072 root      20   0  201704   4344   1220 R  15.7  0.0   1:10.44 rsync                                                    
    68.   3988 root      20   0  201704   5408   1248 R  14.8  0.0   6:16.42 rsync                                                    
    69.  49573 root      20   0  201704   4352   1220 R  14.8  0.0   1:40.17 rsync