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Wall Time

/wȯl tīm/

n. (also 'wall clock time') 1. 'Real world' time (what the clock on the wall shows), as opposed to the system clock's idea of time.

2. The real running time of a program, as opposed to the number of clocks required to execute it (on a timesharing system these will differ, as no one program gets all the clocks, and on multiprocessor systems with good thread support one may get more processor clocks than real-time clocks).