Semiconductor & Computer Engineering
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Difference between revisions of "runtime"
(Created page with "{{title|Runtime}} '''Runtime''' or '''run time''' or '''execution time''' is the total duration a program is executing.") |
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'''Runtime''' or '''run time''' or '''execution time''' is the total duration a program is executing. | '''Runtime''' or '''run time''' or '''execution time''' is the total duration a program is executing. | ||
| + | |||
| + | == Overview == | ||
| + | The total execution time of a program is the length of time in which the program is executing. It is the product of the [[cycles per instruction]], the [[clock cycle]], and the total [[instruction count]] of the program. | ||
| + | |||
| + | :<math> | ||
| + | \begin{align} | ||
| + | T_\text{exec} &= \frac{\texttt{seconds}}{\texttt{program}} = \frac{\texttt{instructions}}{\texttt{program}} \times \frac{\texttt{cycles}}{\texttt{instructions}} \times \frac{\texttt{seconds}}{\texttt{cycle}} \\ | ||
| + | \\ | ||
| + | &= \texttt{IC} \times \texttt{CPI} \times \texttt{clock} \texttt{cycle} \qquad \qquad [\frac{\texttt{seconds}}{\texttt{program}}] | ||
| + | \end{align} | ||
| + | </math> | ||
| + | |||
| + | Note that the reciprocal of execution time is the [[microprocessor performance|performance of the program]]. | ||
| + | |||
| + | == See also == | ||
| + | * [[microprocessor performance]] | ||
| + | * [[cycles per instruction]] | ||
| + | * [[instruction count] | ||
Latest revision as of 21:57, 4 January 2019
Runtime or run time or execution time is the total duration a program is executing.
Overview[edit]
The total execution time of a program is the length of time in which the program is executing. It is the product of the cycles per instruction, the clock cycle, and the total instruction count of the program.
Note that the reciprocal of execution time is the performance of the program.
See also[edit]
- microprocessor performance
- cycles per instruction
- [[instruction count]