hw.cpu_topology.tree: 
\-PACKAGE MEMBERS: cpu0 cpu1 cpu2 cpu3 
  \-CHIP ID 0: cpu0 cpu1 cpu2 cpu3 
    |-CORE ID 0: cpu0 cpu2 
    | |-THREAD ID 0: cpu0 
    | \-THREAD ID 1: cpu2 
    \-CORE ID 1: cpu1 cpu3 
      |-THREAD ID 0: cpu1 
      \-THREAD ID 1: cpu3 

hw.cpu_topology.level_description: 0 - thread; 1 - core; 2 - socket; 3 - anything
hw.cpu_topology.members: cpu0 cpu1 cpu2 cpu3
hw.cpu_topology.cpu0.physical_id: 0
hw.cpu_topology.cpu0.physical_siblings: cpu0 cpu1 cpu2 cpu3
hw.cpu_topology.cpu0.core_id: 0
hw.cpu_topology.cpu0.core_siblings: cpu0 cpu2
hw.cpu_topology.cpu1.physical_id: 0
hw.cpu_topology.cpu1.physical_siblings: cpu0 cpu1 cpu2 cpu3
hw.cpu_topology.cpu1.core_id: 1
hw.cpu_topology.cpu1.core_siblings: cpu1 cpu3
hw.cpu_topology.cpu2.physical_id: 0
hw.cpu_topology.cpu2.physical_siblings: cpu0 cpu1 cpu2 cpu3
hw.cpu_topology.cpu2.core_id: 0
hw.cpu_topology.cpu2.core_siblings: cpu0 cpu2
hw.cpu_topology.cpu3.physical_id: 0
hw.cpu_topology.cpu3.physical_siblings: cpu0 cpu1 cpu2 cpu3
hw.cpu_topology.cpu3.core_id: 1
hw.cpu_topology.cpu3.core_siblings: cpu1 cpu3