terminology - Difference between CPU Usage and CPU Utilization? -


i wondering if there scientific differentiation in terminology when speaking of cpu usage , cpu utilization. have feeling both words used synonyms. both describe relation between cpu time , cpu capacity. wikipedia calls cpu usage. microsoft uses cpu utilization. found article microsoft uses term cpu usage. vmware defines use cpu utilization in context of physical cpus , cpu usage in context of logical cpus. also, there no tag cpu_utilization in stackoverflow.

does know scientific differentiation?

very doubtful. find exact definitions in academic text books bet they'll inconsistent between text books. i've seen definitions in manpages inconsistent actual implementation within code. case assumes definitions obvious never check see if theirs consistent others.

my suggestion definite use , go that. others can have reference (your formula/algorithm) , can translate between yours , theirs.

by way, figuring out utilization, usage, etc. complicated , fraught traps. oss move tasks around, logical cpus move between cores, turbo modes temporarily bump clock rates, work offloaded internal coprocessors, processors go sleep or drop in frequency, hyperthreading multiple logical cpus contend shared resources, etc. what's worse is moving target. exact , well-defined metrics today start out of date hardware , software architectures continue evolve per moore's law , sw equivalent.


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