The contents of
/proc/cpuinfo contains information for all processors down to the virtual level.
Here are some tips on interpreting the contents:
- Each physical processor will present as at least one processor
- Each core will present as at least one processor
- Each hyperthread will present as one processor.
Thus, a dual-socket, dual-core, hyperthreaded system will show as 8 processors. A similar quad-core system will show as 16 processors.
Within the content of
/proc/cpuinfo each logical processor has its own ID. If your system is SMP then it will also have a
physical id. This is naturally the physical processor number. If you have a multi-core processor then each logical processor will also have a
core id. Core ID's are only unique within a single processor. I.e, physical 0 will have core 0 and core 1, and physical 1 will also have core 0 and core 1.