While CPU usage time updates not very often, We have introduced a simple heuristic, that supposes that the load is the same as previous, while CPU usage time doesn't update.
While CPU usage time updates not very often, We have introduced a simple heuristic, that supposes that the load is the same as previous, while CPU usage time doesn't update. But supposing that it could be zero load for a process for some time, We used an arbitrary duration of 2000 milliseconds, after which the same CPU usage time value become legal, and it is supposed that the load is really zero.
Process Cpu usage metrics, as reported by Sigar: