查看cpu信息：
[root@css-management ~]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz
stepping : 2
cpu MHz : 2900.000
cache size : 20480 KB
physical id : 0
siblings : 4
core id : 0
cpu cores : 4
apicid : 0
initial apicid : 0
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave avx hypervisor lahf_lm ida arat epb xsaveopt pln pts dts
bogomips : 5800.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz
stepping : 2
cpu MHz : 2900.000
cache size : 20480 KB
physical id : 0
siblings : 4
core id : 1
cpu cores : 4
apicid : 1
initial apicid : 1
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave avx hypervisor lahf_lm ida arat epb xsaveopt pln pts dts
bogomips : 5800.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 2
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz
stepping : 2
cpu MHz : 2900.000
cache size : 20480 KB
physical id : 0
siblings : 4
core id : 2
cpu cores : 4
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave avx hypervisor lahf_lm ida arat epb xsaveopt pln pts dts
bogomips : 5800.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 3
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz
stepping : 2
cpu MHz : 2900.000
cache size : 20480 KB
physical id : 0
siblings : 4
core id : 3
cpu cores : 4
apicid : 3
initial apicid : 3
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave avx hypervisor lahf_lm ida arat epb xsaveopt pln pts dts
bogomips : 5800.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 4
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz
stepping : 2
cpu MHz : 2900.000
cache size : 20480 KB
physical id : 1
siblings : 4
core id : 0
cpu cores : 4
apicid : 4
initial apicid : 4
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave avx hypervisor lahf_lm ida arat epb xsaveopt pln pts dts
bogomips : 5800.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 5
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz
stepping : 2
cpu MHz : 2900.000
cache size : 20480 KB
physical id : 1
siblings : 4
core id : 1
cpu cores : 4
apicid : 5
initial apicid : 5
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave avx hypervisor lahf_lm ida arat epb xsaveopt pln pts dts
bogomips : 5800.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 6
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz
stepping : 2
cpu MHz : 2900.000
cache size : 20480 KB
physical id : 1
siblings : 4
core id : 2
cpu cores : 4
apicid : 6
initial apicid : 6
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclmulqdq ssse3 cx16 sse4_1 sse4_2 popcnt aes xsave avx hypervisor lahf_lm ida arat epb xsaveopt pln pts dts
bogomips : 5800.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
processor : 7
vendor_id : GenuineIntel
cpu family : 6
model : 45
model name : Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz
stepping : 2
cpu MHz : 2900.000
cache size : 20480 KB
physical id : 1
siblings : 4
core id : 3
cpu cores : 4
apicid : 7
initial apicid : 7
fpu : yes
fpu_exception : yes
cpuid level : 13
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pebs bts xtopology tsc_reliable nonstop_tsc aperfmperf unfair_spinlock pni pclm eopt pln pts dts
bogomips : 5800.00
clflush size : 64
cache_alignment : 64
address sizes : 40 bits physical, 48 bits virtual
power management:
分析：
显示8个逻辑CPU
通过physical id，前面四个逻辑cpu的相同，后四个的相同，所以有两个物理CPU
前面四个和后面四个钟没有croe id相同的 所以不是单核
如果：前面两个的core id相同，后面的两个core ID相同，说明这两个CPU都是单核，启用了超线程技术。
物理cpu个数：
[root@css-management ~]# cat /proc/cpuinfo | grep 'physical id' | sort | uniq |
2
逻辑cpu个数：
[root@css-management ~]# cat /proc/cpuinfo | grep 'processor' | wc -l
8
每个物理cpu的Core的个数：
[root@css-management ~]# cat /proc/cpuinfo | grep 'cpu cores' | wc -l
8
查看cpu几核几个
[root@css-management ~]# cat /proc/cpuinfo | grep physical | uniq -c
1 physical id : 0
1 address sizes : 40 bits physical, 48 bits virtual
1 physical id : 0
1 address sizes : 40 bits physical, 48 bits virtual
1 physical id : 0
1 address sizes : 40 bits physical, 48 bits virtual
1 physical id : 0
1 address sizes : 40 bits physical, 48 bits virtual
1 physical id : 1
1 address sizes : 40 bits physical, 48 bits virtual
1 physical id : 1
1 address sizes : 40 bits physical, 48 bits virtual
1 physical id : 1
1 address sizes : 40 bits physical, 48 bits virtual
1 physical id : 1
1 address sizes : 40 bits physical, 48 bits virtual
[root@css ~]# cat /proc/cpuinfo | grep physical | uniq -c
1 physical id : 0
1 address sizes : 36 bits physical, 48 bits virtual
1 physical id : 0
1 address sizes : 36 bits physical, 48 bits virtual
1 physical id : 0
1 address sizes : 36 bits physical, 48 bits virtual
1 physical id : 0
1 address sizes : 36 bits physical, 48 bits virtual
查看cpu型号：
[root@css-management ~]# cat /proc/cpuinfo | grep name | cut -f2 -d: | uniq -c
8 Intel(R) Xeon(R) CPU E5-2690 0 @ 2.90GHz