I’m self studying for a server+ cert and ran into this paragraph. Am I right that CPU time is a set of ticks utilized, the CPU Capacity is the total capacity, and the CPU usage is the percentage of ticks:capacity?
I have been making notes from this chapter, and the more I get into it the more I seem to find things like this that seem slightly off.
Does anyone have a physical copy of the 2ed McMillan CompTia Server+ study guide I can compare against? I feel like someone is messing with me.
You are correct. Here’s a thread on how CPU usage is calculated:
https://stackoverflow.com/questions/3748136/how-is-cpu-usage-calculated
It’s basically (CPU time of the process) / (clock time), or (CPU time)/(clock time * number of hardware threads), depending on how it’s reported.
Note that there’s are some complications here, like the time “wasted” context switching or running the OS.
Thanks, good thread. I’m not sure if that’s one I referenced to confirm what I suspected, but it is very clear.