From Bugzilla Helper: User-Agent: Mozilla/5.0 (compatible; Konqueror/3.0.0-10; Linux) Description of problem: The idle time in the "cpu" line (which is supposed to be the sum of all individual CPUs) often differs by 10-20 ms (i.e., 1-2 userspace ticks) from the idle time in the "cpu0" line on a single-processor system. Version-Release number of selected component (if applicable): How reproducible: Sometimes Steps to Reproduce: 1. grep cpu /proc/stat Actual Results: cpu 513891 3024 68072 12500724 cpu0 513891 3024 68072 12500722 Expected Results: Identical numbers Additional info: This is a round-off problem. When the total idle time is calculated, the hz_to_std() conversion is applied to user, nice and system times separately, while for an individual CPU, the conversion is applied to the sum.
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