Diff for "CpuTime" - Dr. A's Wiki

Differences between revisions 4 and 8 (spanning 4 versions)

CPU time reconginzes the distinctuion between WallClockTime and the time the CPU is actually doing calculations. CPU time is computing, not including the time waiting for I/O or other running programs. We kjnow that ResponseTime <> CpuTime!

CPU time can be further divided into:

system time - Time spent doing OS work
user time - Time spent executing user program

$C P U_{S y s t e m} + C P U_{U s e r} = E l a p s e d T i m e + I / O T i m e$

$C P U E x e c u t i o n T i m e = \frac{C P U c l o c k c y c l e s f o r a p r o g r a m}{C l o c k R a t e}$

-  ⇤ ← Revision 4 as of 2004-02-17 22:37:14 → 
  Size: 625
  Editor: yakko
  Comment:
+   ← Revision 8 as of 2020-01-26 18:55:39 → ⇥
  Size: 684
  Editor: 68
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 10:
-{{{
CPU         + CPU      = ElapsedTime + I/O Time
   System        user
}}}
+ $C P U_{S y s t e m} + C P U_{U s e r} = E l a p s e d T i m e + I / O T i m e$ 

 $C P U E x e c u t i o n T i m e = \frac{C P U c l o c k c y c l e s f o r a p r o g r a m}{C l o c k R a t e}$
-Line 17:
+Line 16:
-See p26 Computer Architecture by Hennessy and Paterson

See p58 Compute organization
+   * See p26 Computer Architecture by Hennessy and Paterson
   * See p58 Compute organization