tools for Intel-specific processor performance and energy metrics

 Processor Counter Monitor is a set of tools to access various performance
 metrics provided by newer Intel processors. Such metrics include:
  * instructions per cycle
  * core frequencies
  * memory/interconnect/PCIe bandwidth
  * cache misses and utilization
  * time spent in C-states
  * thermal headroom
  * energy consumption
  * NUMA accesses
 and more.