don't use debugging key id

Change-Id: I2c1d0434d79b777c63b48ddbe742e09f862cfe9b
increase sampling interval more gradually

Change-Id: Id89f9651db8649ec24485e23242cf7ff3ba3424a
support CAS latency measurements

Change-Id: I718a6801ae18a32bfd119edfdb513aa87b2609ee
fix reading /proc/net/dev on 3.x kernels

Change-Id: Ib59db76c74639ad69640c21569ebccd1d6fca869