io - Do CPU usage numbers/percentages (e.g. Task Manager) include memory I/O times? -


this i've wondered never looked up.

when os reports 100% cpu usage, mean bottleneck calculations performed cpu, or include stall times, loading data l1, l2, l3 , ram?

if include stall times, there tool allows break figure down components?

the cpu usage reported os includes time stalled waiting memory accesses (as stalls data dependencies on high latency computational operations division).

i suspect 1 use performance counters better handle on taking time, not familiar details of using performance monitoring counters.


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