High latency between I/O requests can be a sign of issues. Collecting
disk metrics can help detect those issues. Windows / Hyper-V Server
2012 R2 can collect those metrics. This patch adds a disk latency
metrics implementation for the Hyper-V Inspector as well as disk latency
and per device latency pollsters.
DocImpact
Change-Id: I1621fc7d4226ae1f46cdfca878e8b52487ca4379
Implements: blueprint hyper-v-disk-latency-metrics
ef6f21ada7