Run time vs CPU time

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Message 1242382 - Posted: 6 Jun 2012, 18:06:26 UTC

What makes the difference between
Run time and CPU time?

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Message 1242463 - Posted: 6 Jun 2012, 21:37:35 UTC - in response to Message 1242382.  

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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Questions and Answers : Getting started : Run time vs CPU time


 
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