Differences between revisions 31 and 32
Revision 31 as of 2008-10-24 02:24:20
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Editor: 209-142-131-35
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Revision 32 as of 2020-01-23 23:15:20
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Editor: scot
Comment:
Deletions are marked like this. Additions are marked like this.
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<<latex()>> $$
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<<latex()>> (1) $$$Speedup Overall = \frac{Old~Execution~Time}{New~Execution~Time}$$$
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<<latex($$New~Exec~Time = Old~Exec~Time \left( 1 - FractionEnhanced + \frac{FractionEnhanced}{SpeedupEnhanced}\right)$$)>> $$$New~Exec~Time = Old~Exec~Time( 1 - Fraction Enhanced + \frac{Fraction Enhanced}{Speedup Enhanced})$$$
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<<latex()>> $$$Speedup Overall=\left(\frac{1}{1-Fraction Enhanced + \frac{Fraction Enhanced}{Speedup Enhanced}}\right)$$$

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See SpeedUp

Notice that we are talking about the entire task here and that performance (speedup) is defined in terms of execution time! So we have to define the following:

This gives a new Execution time of

So we have

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AmdahlsLaw (last edited 2020-01-23 23:15:20 by scot)