Linux查看物理CPU个数、核数、逻辑CPU个数
# 总核数 = 物理CPU个数 X 每颗物理CPU的核数
# 总逻辑CPU数 = 物理CPU个数 X 每颗物理CPU的核数 X 超线程数
# 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) #【物理CPU内核的个数】（1个物理CPU里面有几个物理内核）
cat /proc/cpuinfo| grep "cpu cores"| uniq
”cpu cores“指的是一个物理CPU有几个核
# 查看逻辑CPU的个数
cat /proc/cpuinfo| grep "processor"| wc -l
查看CPU信息（型号） #【逻辑CPU数量和型号】
cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
【物理CPU中逻辑CPU的个数】（如果不使用超线程技术，则此值和物理CPU内核数量一致；不一致则为整倍数）
cat /proc/cpuinfo | grep 'siblings' | uniq
“siblings”指的是一个物理CPU有几个逻辑CPU
【超线程】（分别输出cpu cores和siblings数量，使用超线程则后者翻倍）
cat /proc/cpuinfo | grep -e "cpu cores" -e "siblings" | sort | uniq
如何判断是否开启超线程
“超线程（Hyper-Threading，简称“HT”）”技术。超线程技术就是利用特殊的硬件指令，把两个逻辑内核模拟成两个物理芯片，让单个处理器都能使用线程级并行计算，进而兼容多线程操作系统和软件，减少了CPU的闲置时间，提高的CPU的运行效率。
超线程技术是在一颗CPU同时执行多个程序而共同分享一颗CPU内的资源，理论上要像两颗CPU一样在同一时间执行两个线程，虽然采用超线程技术能同时执行两个线程，但它并不象两个真正的CPU那样，每个CPU都具有独立的资源。当两个线程都同时需要某一个资源时，其中一个要暂时停止，并让出资源，直到这些资源闲置后才能继续。因此超线程的性能并不等于两颗CPU的性能。
“siblings”指的是一个物理CPU有几个逻辑CPU
”cpu cores“指的是一个物理CPU有几个核
如果“siblings”和“cpu cores”一致，则说明不支持超线程，或者超线程未打开。
如果“siblings”是“cpu cores”的两倍，则说明支持超线程，并且超线程已打开。
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。
例如，如果系统包含两个物理封装，每个封装中又包含两个支持超线程（HT）技术的处理器内核,则 /proc/cpuinfo 文件将包含此数据。（注：数据并不在表格中。）
processor 0 4 2 6 1 5 3 7
physical id 0 0 0 0 1 1 1 1
core id 0 0 1 1 2 2 3 3
siblings 4 4 4 4 4 4 4 4
cpu cores 2 2 2 2 2 2 2 2
此例说明：
1）一个物理封装有四个内核，即有4个逻辑处理器。
2）一个内核上有2个不同的processer，即系统支持超线程技术（HT)。
值得注意的是physical id和core id的编号可能是也可能不是连续的。系统上有两个物理封装并不罕见，而且physical id可能等于0和3。
参考链接：https://www.cnblogs.com/hehehaha/p/6332269.html
cat /proc/cpu 全部输出
[machangwei@xxsx01 ~]$ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 0 siblings : 8 core id : 0 cpu cores : 8 apicid : 0 initial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 0 siblings : 8 core id : 1 cpu cores : 8 apicid : 1 initial apicid : 1 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 2 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 0 siblings : 8 core id : 2 cpu cores : 8 apicid : 2 initial apicid : 2 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 0 siblings : 8 core id : 3 cpu cores : 8 apicid : 3 initial apicid : 3 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 4 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 0 siblings : 8 core id : 4 cpu cores : 8 apicid : 4 initial apicid : 4 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 5 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 0 siblings : 8 core id : 5 cpu cores : 8 apicid : 5 initial apicid : 5 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 6 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 0 siblings : 8 core id : 6 cpu cores : 8 apicid : 6 initial apicid : 6 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 0 siblings : 8 core id : 7 cpu cores : 8 apicid : 7 initial apicid : 7 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 8 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 1 siblings : 8 core id : 0 cpu cores : 8 apicid : 8 initial apicid : 8 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 9 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 1 siblings : 8 core id : 1 cpu cores : 8 apicid : 9 initial apicid : 9 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 10 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 1 siblings : 8 core id : 2 cpu cores : 8 apicid : 10 initial apicid : 10 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 11 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 1 siblings : 8 core id : 3 cpu cores : 8 apicid : 11 initial apicid : 11 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 12 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 1 siblings : 8 core id : 4 cpu cores : 8 apicid : 12 initial apicid : 12 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 13 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 1 siblings : 8 core id : 5 cpu cores : 8 apicid : 13 initial apicid : 13 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 14 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 1 siblings : 8 core id : 6 cpu cores : 8 apicid : 14 initial apicid : 14 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: processor : 15 vendor_id : GenuineIntel cpu family : 6 model : 63 model name : Intel(R) Xeon(R) CPU E5-2640 v3 @ 2.60GHz stepping : 2 microcode : 0x3a cpu MHz : 2593.993 cache size : 20480 KB physical id : 1 siblings : 8 core id : 7 cpu cores : 8 apicid : 15 initial apicid : 15 fpu : yes fpu_exception : yes cpuid level : 15 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf 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 epb fsgsbase tsc_adjust bmi1 avx2 smep bmi2 invpcid xsaveopt dtherm arat pln pts bogomips : 5187.98 clflush size : 64 cache_alignment : 64 address sizes : 42 bits physical, 48 bits virtual power management: