Differences between revisions 19 and 31 (spanning 12 versions)
Revision 19 as of 2005-06-27 22:26:31
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Editor: yakko
Comment:
Revision 31 as of 2008-10-24 02:24:20
Size: 720
Editor: 209-142-131-35
Comment:
Deletions are marked like this. Additions are marked like this.
Line 3: Line 3:
{{{#!latex2
Speedup=Performance using enhancement when possiblePerformance without enhancement
}}}
<<latex(Speedup=Performance using enhancement when possiblePerformance without enhancement)>>
Line 11: Line 9:
[[latex2(SpeedupOverall=Old Execution TimeNew Execution Time)]] (1) <<latex(SpeedupOverall=Old Execution TimeNew Execution Time)>> (1)
Line 13: Line 11:
{{{#!latex2
New Exec Time=Old Exec Time(1FractionEnhanced+FractionEnhancedSpeedupEnhanced)
}}}
This gives a new Execution time of
Line 17: Line 13:
{{{
or

                       Execution Time affected by Improvement
New Execution Time = -------------------------------------- + Execution Time unaffected
                            Amount of Improvement (x times)
<<latex(New Exec Time=Old Exec Time(1FractionEnhanced+FractionEnhancedSpeedupEnhanced))>>
Line 25: Line 16:
                                     1
SpeedupOverall = --------------------------------------------
                                           FractionEnhanced
                 (1 - FractionEnhanced) + ------------------ )
                                           SpeedupEnhanced
Line 31: Line 17:
}}} <<latex(SpeedupOverall=(11FractionEnhanced+FractionEnhancedSpeedupEnhanced))>>

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<<latex(Speedup=Performance using enhancement when possiblePerformance without enhancement)>>

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:

<<latex(SpeedupOverall=Old Execution TimeNew Execution Time)>> (1)

This gives a new Execution time of

<<latex(New Exec Time=Old Exec Time(1FractionEnhanced+FractionEnhancedSpeedupEnhanced))>>

So we have

<<latex(SpeedupOverall=(11FractionEnhanced+FractionEnhancedSpeedupEnhanced))>>

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AmdahlsLaw (last edited 2020-01-23 23:15:20 by 68)