cat /proc/cpuinfo
常用命令如下：
# 查看cpu详细信息
cat /proc/cpuinfo
# 查看CPU信息（型号）
cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
# 查看物理CPU个数
cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l
# 查看每个物理CPU中core的个数(即核数)
cat /proc/cpuinfo| grep "cpu cores"| uniq
# 查看逻辑CPU的个数
cat /proc/cpuinfo| grep "processor"| wc -l
下面是我阿里云的服务器信息，2核4G的ECS。
[root@iZ2zebthf35ejlps5v87ksZ ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
2 Intel(R) Xeon(R) CPU E5-2682 v4 @ 2.50GHz
[root@iZ2zebthf35ejlps5v87ksZ ~]# cat /proc/cpuinfo| grep "physical id"| sort| uniq| wc -l
1
[root@iZ2zebthf35ejlps5v87ksZ ~]# cat /proc/cpuinfo| grep "cpu cores"| uniq
cpu cores : 1
[root@iZ2zebthf35ejlps5v87ksZ ~]# cat /proc/cpuinfo| grep "processor"| wc -l
2
从上面的结果可以看到，我的机器拥有两个逻辑cpu，型号是Intel(R) Xeon(R) CPU E5-2682 v4 @ 2.50GHz，但是从结果“physical”来看,只有一个物理核心。
扩展：uniq命令是去重，wc是统计。
lscpu
此外，还有个lscpu命令，可以提供有效、精简的cpu信息。
实例如下：
[root@yaomm ~]# lscpu
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
Byte Order: Little Endian
CPU(s): 2
On-line CPU(s) list: 0,1
Thread(s) per core: 2
Core(s) per socket: 1
Socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 79
Model name: Intel(R) Xeon(R) CPU E5-2682 v4 @ 2.50GHz
Stepping: 1
CPU MHz: 2500.030
BogoMIPS: 5000.06
Hypervisor vendor: KVM
Virtualization type: full
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 40960K
NUMA node0 CPU(s): 0,1
Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl 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 ibrs ibpb stibp fsgsbase tsc_adjust bmi1 hle avx2 smep bmi2 erms invpcid rtm rdseed adx smap xsaveopt spec_ctrl intel_stibp
部分参数释义如下
Architecture: x86_64#<=== x86架构CPU(s): 2#<=== 双核cpuThread(s) per core: 2#<=== 每核超线程Core(s) per socket: 1#<=== 每核线程数Socket(s): 1#<=== 主板插槽，物理cpu数Model name: Intel(R) Xeon(R) CPU E5-2682 v4 @ 2.50GHz#<=== cpu型号L1d cache及其他cache #<=== cpu缓存相关