Diff for "AmdahlsLaw"

Differences between revisions 17 and 32 (spanning 15 versions)

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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-  ⇤ ← Revision 17 as of 2005-06-27 22:25:30 → 
  Size: 1111
  Editor: yakko
  Comment:
+   ← Revision 32 as of 2020-01-23 23:15:20 → ⇥
  Size: 676
  Editor: scot
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 3:
-{{{#!latex2
$$Speedup = \frac{Performance~using~enhancement~when~possible}{Performance~without~enhancement}$$
}}}
+$$$Speedup = \frac{Performance~using~enhancement~when~possible}{Performance~without~enhancement}$$$
-Line 11:
+Line 9:
-{{{#!latex2
$$SpeedupOverall = \frac{Old~Execution~Time}{New~Execution~Time}$$
}}}
+$$$Speedup Overall = \frac{Old~Execution~Time}{New~Execution~Time}$$$
-Line 15:
+Line 11:
-\n
+This gives a new Execution time of
-Line 17:
+Line 13:
-{{{#!latex2
$$New~Exec~Time = Old~Exec~Time \left( 1 - FractionEnhanced + \frac{FractionEnhanced}{SpeedupEnhanced}\right)$$
}}}

{{{
or

                       Execution Time affected by Improvement
New Execution Time =   --------------------------------------  + Execution Time unaffected
                            Amount of Improvement (x times)
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+Line 16:
-
SpeedupOverall = --------------------------------------------
                                           FractionEnhanced
                 (1 - FractionEnhanced) + ------------------ )
                                           SpeedupEnhanced
-Line 35:
+Line 17:
-}}}