If you sample say CPU usage at a regular interval you may get a situation where you are in phase with a process that uses CPU at the same interval and thus interpret high instantaneous CPU as constant high CPU usage.
I wondered whether anyone had researched about adding in some randomnesss into the sampling to avoid this and found this article on Stochastic Sampling in Anti-Aliasing. It appears that evolution has already built this in and our randomness in the photoreceptors in our eyes aviods aliasing. Amazing...
Posted by stuartcw at January 23, 2006 10:46 AM