/proc/cpuinfo provides such info:
...
vendor_id : GenuineIntel
cpu family : 6
model : 63
model name : Intel(R) Xeon(R) CPU E5-2630 v3 @ 2.40GHz
stepping : 2
microcode : 59
cpu MHz : 2397.161
cache size : 20480 KB
physical id : 0
siblings : 16 <---------------------------
core id : 1
cpu cores : 8 <---------------------------
apicid : 2
initial apicid : 2
fpu : yes
fpu_exception : yes
...
Intel provides this:
https://ark.intel.com/products/83356/Intel-Xeon-Processor-E5-2630-v3-20M-Cache-2_40-GHz
Why is terminology different? I usually heard term thread, not a sibling. E.g. "Single-thread program"
