Groups > comp.os.msdos.programmer > #327

Re: Opcode frequency process/tools?

From	Ross Ridge <rridge@nospicedham.csclub.uwaterloo.ca>
Subject	Re: Opcode frequency process/tools?
Message-ID	<j89oi2$uqb$1@rumours.uwaterloo.ca> (permalink)
Date	2011-10-26 15:54 -0400
Organization	University of Waterloo
References	<f5d9291d-0bb2-4088-ab58-e8b18dd8cfb9@t8g2000yql.googlegroups.com> <ug2mn8-pe3.ln1@ntp6.tmsw.no>
Newsgroups	comp.lang.asm.x86, comp.os.msdos.programmer

Cross-posted to 2 groups.

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Jim Leonard wrote:
> I suppose that, to be truly close to my input set, I should somehow
> log program flow and get the frequency of the actual executed
> instructions.  I believe the DOSBOX emulator, if compiled in debug
> mode, can dump the last 20,000 executed instructions.  In fact, I
> think that would be more realistic; I will look into that.

Terje Mathisen  <"terje.mathisen at tmsw.no"@giganews.com> wrote:
>Not only more realistic, rather "the only reasonable way to do it", and 
>the method employed by both Intel and AMD when they try to figure out 
>which instructions to fast-path in hardware and which can be allowed to 
>run a little slower.

Yah, you really need to count the instructions as they're actually
being executed by the processor.  A lot of instructions in a program
will never be executed or executed only once, while a small tight loop
might end up getting the majority of execution time.

					Ross Ridge

-- 
 l/  //	  Ross Ridge -- The Great HTMU
[oo][oo]  rridge@csclub.uwaterloo.ca
-()-/()/  http://www.csclub.uwaterloo.ca/~rridge/ 
 db  //

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Thread

Opcode frequency process/tools? Jim Leonard <mobygamer@nospicedham.gmail.com> - 2011-10-26 11:41 -0700
  Re: Opcode frequency process/tools? Terje Mathisen <"terje.mathisen at tmsw.no"@giganews.com> - 2011-10-26 21:09 +0200
    Re: Opcode frequency process/tools? Ross Ridge <rridge@nospicedham.csclub.uwaterloo.ca> - 2011-10-26 15:54 -0400
    Re: Opcode frequency process/tools? Jim Leonard <mobygamer@nospicedham.gmail.com> - 2011-10-28 07:07 -0700
      Re: Opcode frequency process/tools? Terje Mathisen <"terje.mathisen at tmsw.no"@giganews.com> - 2011-10-29 02:46 +0200
        Re: Opcode frequency process/tools? Jim Leonard <mobygamer@nospicedham.gmail.com> - 2011-10-31 07:20 -0700
          Re: Opcode frequency process/tools? Terje Mathisen <"terje.mathisen at tmsw.no"@nospicedham.giganews.com> - 2011-10-31 19:22 +0100
      Re: Opcode frequency process/tools? Jim Leonard <mobygamer@nospicedham.gmail.com> - 2011-10-31 07:41 -0700
        Re: Opcode frequency process/tools? Bogus@Embarq.com (Steve) - 2011-11-01 13:13 +0000
  Re: Opcode frequency process/tools? "Rod Pemberton" <do_not_have@nospicedham.noavailemail.cmm> - 2011-10-26 19:12 -0400
    Re: Opcode frequency process/tools? Jim Leonard <mobygamer@nospicedham.gmail.com> - 2011-10-28 07:11 -0700
   Re: Opcode frequency process/tools?  hopcode <hopcode@nospicedham.nulnulul.de> - 2011-10-27 01:18 +0200
    Re: Opcode frequency process/tools? Jim Leonard <mobygamer@nospicedham.gmail.com> - 2011-10-28 07:13 -0700
  Re: Opcode frequency process/tools? Hugh Aguilar <hughaguilar96@nospicedham.yahoo.com> - 2011-10-26 22:28 -0700
    Re: Opcode frequency process/tools? "Rod Pemberton" <do_not_have@nospicedham.noavailemail.cmm> - 2011-10-27 13:37 -0400
      Re: Opcode frequency process/tools? Hugh Aguilar <hughaguilar96@nospicedham.yahoo.com> - 2011-10-27 22:49 -0700
    Re: Opcode frequency process/tools? Jim Leonard <mobygamer@nospicedham.gmail.com> - 2011-10-28 07:24 -0700
  Re: Opcode frequency process/tools? Phil Carmody <thefatphil_demunged@nospicedham.yahoo.co.uk> - 2011-10-27 14:00 +0300
    Re: Opcode frequency process/tools? "Rod Pemberton" <do_not_have@nospicedham.noavailemail.cmm> - 2011-10-27 13:38 -0400
      Re: Opcode frequency process/tools? Robert Wessel <robertwessel2@nospicedham.yahoo.com> - 2011-10-27 14:51 -0500
        Re: Opcode frequency process/tools? Hugh Aguilar <hughaguilar96@nospicedham.yahoo.com> - 2011-10-27 22:40 -0700

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