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+#REDIRECT [[Elapsed real time]] {{R from merge}}
-{{context|date=February 2008}}
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-'''Wall clock time''' is the human perception of the passage of time from the start to the completion of a task.  In the context of a task being performed on a [[computer]], wall clock time or '''wall time''' is a measure of how much real [[time]] that elapses from start to end, including time that passes due to [[sleep (operating system)|programmed (artificial) delays]] or waiting for resources to become available.
-In the context of [[time zone]] calculations, wall clock time identifies the local time with any applicable adjustments for [[daylight saving time]]. It provides a way to refer to a time without specifying standard time or daylight saving time.
-In [[computer architecture]] and organization, Wall Clock Time (WCT) is related to three terms:
-*CPU time
-*IO time
-*Communication channel delay (if data are scattered on multiple machines)
-Thus, ''WCT = CPU time + IO time + Communication delay''
-==See also==
-*[[System time]]
-{{compu-stub}}
-[[Category:Time]]