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Run time vs CPU time
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TUKIA Send message Joined: 19 Feb 12 Posts: 3 Credit: 6,921,684 RAC: 0 |
What makes the difference between Run time and CPU time? |
Jord Send message Joined: 9 Jun 99 Posts: 15184 Credit: 4,362,181 RAC: 3 |
Run time is the time it takes for the task to run from start to finish, equal to wall-clock time. CPU time is the time that the CPU is actually working on the task. There are whole minutes that there's memory swapping taking place, in which the CPU isn't used. Or in the case of the GPU, where the CPU is only used to translate and transfer data, not to actually do any calculations as these happen on the GPU. |
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