无需第三方工具,proc文件系统里面的/proc/cpuinfo提供了丰富的cpu信息。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 processor : 0 vendor_id : AuthenticAMD cpu family : 16 model : 4 model name : Quad-Core AMD Opteron(tm) Processor 8382 stepping : 2 microcode : 0x1000086 cpu MHz : 2611.977 cache size : 512 KB physical id : 0 siblings : 4 core id : 0 cpu cores : 4 apicid : 4 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 5 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save bogomips : 5223.95 TLB size : 1024 4K pages clflush size : 64 cache_alignment : 64 address sizes : 48 bits physical, 48 bits virtual power management: ts ttp tm stc 100mhzsteps hwpstate
型号和逻辑CPU个数
1 2 $ cat /proc/cpuinfo grep 'model name' cut -f2 -d: uniq -c 32 Quad-Core AMD Opteron(tm) Processor 8382
可以看到有32个逻辑CPU，后面是型号
物理CPU个数
1 2 3 4 5 6 7 8 9 $ cat /proc/cpuinfo grep 'physical id' uniq -d physical id : 0 physical id : 1 physical id : 2 physical id : 3 physical id : 4 physical id : 5 physical id : 6 physical id : 7
或者
1 2 $ cat /proc/cpuinfo grep 'physical id' uniq -d cut -f1 -d: uniq -c 8 physical id
可以看到有8颗物理CPU
每颗CPU核心数
1 2 $ cat /proc/cpuinfo grep 'cpu cores' uniq cpu cores : 4
或者
1 2 3 4 5 $ cat /proc/cpuinfo grep 'core id' sort uniq core id : 0 core id : 1 core id : 2 core id : 3
8*4刚好是32颗逻辑CPU,如果有超线程技术则不是简单的相乘就可以，还要乘以每个核心的线程数。
还有一个命令lscpu,可以总览系统cpu概况：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 $ lscpu Architecture: x86_64 CPU op-mode(s): 32 -bit, 64 -bit Byte Order: Little Endian CPU(s): 32 On-line CPU(s) list: 0 -31 Thread(s) per core: 1 Core(s) per socket: 4 Socket(s): 8 NUMA node(s): 4 Vendor ID: AuthenticAMD CPU family: 16 Model: 4 Stepping: 2 CPU MHz: 2611.977 BogoMIPS: 5224.55 Virtualization: AMD-V L1d cache: 64K L1i cache: 64K L2 cache: 512K L3 cache: 6144K NUMA node0 CPU(s): 0 -3 NUMA node1 CPU(s): 4 -7 NUMA node2 CPU(s): 8 -11 NUMA node3 CPU(s): 12 -31
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