BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  How is the "penalty for size" defined?          BorlandTalk.com Forum Index -> Delphi Language BASM View previous topic :: View next topic   Author Message John Herbster Guest Posted: Mon Nov 06, 2006 8:02 pm    Post subject: How is the "penalty for size" defined? In the voting for the "penalty for size constant be for StrToInt32", what is the devinition of the "penalty for size" constant? --JohnH Back to top Dennis Guest Posted: Mon Nov 06, 2006 9:01 pm    Post subject: Re: How is the "penalty for size" defined? Hi John We calculate benchmark values for size penalty targets by Benchmark := Speed - Size * PenaltyForSizeConstant; or Benchmark := RunTime + Size * PenaltyForSizeConstant; Best regards Dennis Kjaer Christensen ---------------------------------------------------------------------------- ---- Jeg beskyttes af den gratis SPAMfighter til privatbrugere. Den har indtil videre sparet mig for at få 4969 spam-mails Betalende brugere får ikke denne besked i deres e-mails. Hent en gratis SPAMfighter her. Back to top John Herbster Guest Posted: Mon Nov 06, 2006 9:29 pm    Post subject: Re: How is the "penalty for size" defined? "Dennis" <marianndkc (AT) home3 (DOT) gvdnet.dk> wrote Quote: We calculate benchmark values for size penalty targets by Benchmark := Speed - Size * PenaltyForSizeConstant; or Benchmark := RunTime + Size * PenaltyForSizeConstant; That does not seem to make sense to me. May I presume that Size = <code space> + <stack space> + <heap space> Speed = -RunTime or Speed = 1/RunTime and RunTime = CPU_Cycles/NbrRepeats or RunTime = CPU_Cycles for NbrRepeats where NbrRepeats is otherwise specified somewhere? If so, then where? Rgds, JohnH Back to top Dennis Guest Posted: Tue Nov 07, 2006 9:12 am    Post subject: Re: How is the "penalty for size" defined? Hi John Quote: May I presume that No you may not. Look in the B&V's for actual implementations or ask here. Of course it makes sense what we are doing ;-) Take a look at our spreadsheets and our SpreadsheetCreator. A typical benchmark is like this function TMainForm.SubBenchmark1 : Double; var J, I5, K : Cardinal; I1 : Integer; RunNo : Cardinal; RunTimeSec : Double; lpPerformanceCount, StartCount, EndCount, NoOfTicks, MinNoOfTicks : Int64; begin I1 := 0; for J := 1 to NOOFRERUNS do begin if QueryPerformanceCounter(lpPerformanceCount) then StartCount := lpPerformanceCount else raise Exception.Create('QueryPerformanceCounter failed'); for RunNo := 1 to MAXNOOFRUNSSUB1 do for K := 0 to Length(SubBenchmark1StringArray)-1 do begin //Use testset I1 := StrToInt32Function(SubBenchmark1StringArray[K]); end; if QueryPerformanceCounter(lpPerformanceCount) then EndCount := lpPerformanceCount else raise Exception.Create('QueryPerformanceCounter failed'); NoOfTicks := EndCount - StartCount; if NoOfTicks < 0 then raise Exception.Create('Tick counter wrapped around'); NoOfTicksArray[J-1] := NoOfTicks; end; ResultEdit.Text := IntToStr(I1); //Get fastest run MinNoOfTicks := NoOfTicksArray[0]; for I5 := 1 to NOOFRERUNS-1 do begin if NoOfTicksArray[I5] < MinNoOfTicks then MinNoOfTicks := NoOfTicksArray[I5]; end; RunTimeSec := MinNoOfTicks / Frequency; Result := Round(RunTimeSec*SUBBENCH1SCALE); end; It measures the runtime for a bunch of scenario. Shorter runtime is better. The sizeforpenalty simply makes the benchmark result look worse by adding Size*SizeForPenaltyConstant to it. The SpreadsheetCreator has functionality to list winners as function of SizeForPenaltyConstant. This proves the concept. I give this list prior to all polls. Functions can be winners if there are no smaller function with more speed. We select a winner function with a certain compromise between size and speed by chosing a SizeForPenaltyConstant. Best regards Dennis Kjaer Christensen ---------------------------------------------------------------------------- ---- Jeg beskyttes af den gratis SPAMfighter til privatbrugere. Den har indtil videre sparet mig for at få 5172 spam-mails Betalende brugere får ikke denne besked i deres e-mails. Hent en gratis SPAMfighter her. Back to top John Herbster Guest Posted: Thu Nov 09, 2006 6:30 pm    Post subject: Re: How is the "penalty for size" defined? "Dennis" <marianndkc (AT) home3 (DOT) gvdnet.dk> wrote Quote: ... look at our spreadsheets and our SpreadsheetCreator ... I have Googled for these w/o success. Where may they be found? Rgds, JohnH Back to top Dennis Guest Posted: Thu Nov 09, 2006 8:18 pm    Post subject: Re: How is the "penalty for size" defined? Hi At our site and at our Yahoo group. http://www.fastcodeproject.org/ Best regards Dennis Kjaer Christensen ---------------------------------------------------------------------------- ---- Jeg beskyttes af den gratis SPAMfighter til privatbrugere. Den har indtil videre sparet mig for at få 5265 spam-mails Betalende brugere får ikke denne besked i deres e-mails. Hent en gratis SPAMfighter her. Back to top John Herbster Guest Posted: Thu Nov 09, 2006 9:14 pm    Post subject: Re: How is the "penalty for size" defined? Thanks, Dennis. I have downloaded, compiled, and run the Spreadsheet Creator. It looks nice, but I have a suggestion: If you want to make it more understandable to programmers new to the FastCode work, then I suggest that you add more definitions for the terms used and the values presented. However, if I am the only non-participant interested then there is no need. Regards, JohnH Back to top Dennis Guest Posted: Fri Nov 10, 2006 2:20 am    Post subject: Re: How is the "penalty for size" defined? Hi John It is only an internal tool, but it still needs some work. It is very rough on the edges. I need to prioritize my limited resources and it is more important to work on B&V's and it is also important to make support for FP based challenges in the SpreadsheetCreator or make another version for it. I spend a little time now and then to polish it up and it is slowly reaching 1.0.0 standard. Best regards Dennis Kjaer Christensen ---------------------------------------------------------------------------- ---- Jeg beskyttes af den gratis SPAMfighter til privatbrugere. Den har indtil videre sparet mig for at få 5271 spam-mails Betalende brugere får ikke denne besked i deres e-mails. Hent en gratis SPAMfighter her. 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