Linux CPU Info

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Check CPU information on Linux, just like check memory by watching /proc/meminfo

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cat /proc/cpuinfo

## each processor has a dedicated description
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 61
model name      : Intel Core Processor (Broadwell, IBRS)
stepping        : 2
microcode       : 0x1
cpu MHz         : 2199.996
cache size      : 4096 KB
physical id     : 0
siblings        : 1
core id         : 0
cpu cores       : 1
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 sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ss syscall nx pdpe1gb rdtscp lm constant_tsc rep_good nopl eagerfpu pni pclmulqdq vmx ssse3 fma cx16 pcid sse4_1 sse4_2 x2apic movbe popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm abm 3dnowprefetch ssbd ibrs ibpb tpr_shadow vnmi flexpriority ept vpid fsgsbase bmi1 hle avx2 smep bmi2 erms invpcid rtm rdseed adx smap xsaveopt spec_ctrl
bogomips        : 4399.99
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual

Count number of processing units

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cat /proc/cpuinfo | grep processor | wc -l

To get actualy number of cores

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cat /proc/cpuinfo | grep 'core id'

Note: The number of processors shown by /proc/cpuinfo might not be the actual number of cores on the processor. For example a processor with 2 cores and hyperthreading would be reported as a processor with 4 cores.

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