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

Differences between revisions 5 and 7 (spanning 2 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

$$$CPU_{System}+CPU_{User}=ElapsedTime + I/O~Time$$$

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

-  ⇤ ← Revision 5 as of 2004-02-17 22:55:34 → 
  Size: 786
  Editor: yakko
  Comment:
+   ← Revision 7 as of 2020-01-26 18:55:21 → ⇥
  Size: 683
  Editor: 68
  Comment:
-Deletions are marked like this.
+Additions are marked like this.
 Line 10:
-{{{
CPU         + CPU      = ElapsedTime + I/O Time
   System        user
+ $C P U_{S y s t e m} + C P U_{U s e r} = E l a p s e d T i m e + I / O T i m e$
-Line 14:
+Line 12:
-                     CPU clock cycles for a program
CPU Exceution Time = ------------------------------
                                Clock Rate
}}}
+ $C P U E x e c u t i o n T i m e = \frac{C P U c l o c k c y c l e s f o r a p r o g r a m}{C l o c k R a t e}$