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Erik Malund
08/01/05 06:27
Read: 785 times
Mt Airy, Nc

#98577 - absolutely, but what good does it do
Responding to: Jan Waclawek's previous message
Well, I think that automated worst-case cycle counting is at least partially possible, especially in structured high level language (C).
absolutely, but what good does it do.
You make something time critical, use the "automated worst-case cycle counting" and everything is wonderful. Then 3 weeks later
a) you find a bug and upgrade the compiler
b) you have a reason to change the optimizer setting
and - woila, the cycle count changes. Even worse: 3 years lates somebody else - or yourself - has to make a minor change and for thet reasom need to do a) or b).

Counting cycles in C is a worthless excersize


List of 18 messages in thread
Counting cycles... possible in C?      Jan Waclawek      07/28/05 01:03      
   You need a Profiler      Andy Neil      08/01/05 00:00      
      The compiler knows      Jan Waclawek      08/01/05 03:21      
         Source code useless      Andy Neil      08/01/05 04:50      
         That's why you need Assembler!      Andy Neil      08/01/05 04:56      
            nohohoho      Jan Waclawek      08/01/05 05:12      
               Speed is not everything!      Andy Neil      08/01/05 05:54      
   Cycles vary?      James Krushlucki      08/01/05 01:37      
      I know      Jan Waclawek      08/01/05 03:23      
   absolutely, but what good does it do      Erik Malund      08/01/05 06:27      
      other way round      Jan Waclawek      08/01/05 07:10      
         Yes, the things posted apply in this cas      Erik Malund      08/01/05 07:23      
            exactly for this reason      Jan Waclawek      08/01/05 08:29      
               how can you automate that it is small en      Erik Malund      08/01/05 08:35      
   Use Microsoft Excel      Aubrey Kagan      08/01/05 18:04      
      excel and conditional branches ?      Erik Malund      08/02/05 05:53      
         That's why      Aubrey Kagan      08/02/05 07:13      
            That makes absolutotally no difference,      Erik Malund      08/02/05 07:23      

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