message: update FAQ with an answer about hidden QPI/UPI devices
  resolve
diff: **Q:** pcm-iio Tool outputs "Server CPU is required for this tool! Program aborted". Is there a way I can monitor my PCIe link bandwidth using one of the PCM utilities?
  **A:** The "IO" metric in pcm.x is the closest capability to monitor I/O PCIe traffic on client CPUs.
  +
  +**Q:** PCM reports "ERROR: QPI LL monitoring device (...) is missing".
  +
  +**A:** It is likely a BIOS issue. See details [here](https://software.intel.com/content/www/us/en/develop/articles/bios-preventing-access-to-qpi-performance-counters.html)
  