From:  Dean Swan at MITEL on 09/24/99 06:45 PM

Dwight,

     Thanks.  I updated my image from the server, and re-ran the benchmarks.  It
averaged 20085903 bytecodes/S.  Here are my actual results:


0 tinyBenchmarks.

"with Psion Emulator running"
 '20100502 bytecodes/sec; 1212885 sends/sec'
 '19962570 bytecodes/sec; 1221790 sends/sec'
 '20227560 bytecodes/sec; 1221790 sends/sec'
 '20356234 bytecodes/sec; 1221790 sends/sec'

"without Psion Emulator running"
 '20227560 bytecodes/sec; 1222688 sends/sec'
 '20214782 bytecodes/sec; 1221790 sends/sec'
 '20227560 bytecodes/sec; 1221790 sends/sec'
 '19370460 bytecodes/sec; 1186932 sends/sec'

                                   -Dean Swan
                                   dean_swan at mitel.com





Dwight Hughes <dwighth at ipa.net> on 09/24/99 05:09:47 PM

Please respond to squeak at cs.uiuc.edu

To:   squeak at cs.uiuc.edu
cc:    (bcc: Dean Swan/Ogd/Mitel)

Subject:  Re: Strange WinNT Performance Issue




I was seeing this "quantization" effect earlier when I was running the
benchmarks -- I would see values of 16,666,666 pop up occasionally on a
PII/300 or 25,000,000 on a PII/400. I increased the values in
#tinyBenchmarks to get stable realistic answers. In update 1437 to 2.5
Andreas Raab changed #tinyBenchmark so it automatically compensates by
increasing the values enough to make the benchmarks run for at least 1
second each on any machine. Try getting the last set of 2.5 updates from
the server and see what the benchmarks say.

-- Dwight

Dean_Swan at Mitel.COM wrote:
>
> Andreas,
>
>      I just tried an intersting benchmark experiment.  On my PII/450 at work,
> running WinNT/SP4, Squeak 2.5 (through 1432), 2.5 VM (build 6):
>
> case 1)
>     Open applications under NT -   Psion EPOC32 R5 Emulator,
>                      Win 3.1 Terminal Program,
>                      Premia CodeWrite 5.1b,
>                     Internet Explorer 4.01
>
>      0 tinyBenchmarks.        25000000 bytecodes/s, 1208527 sends/s
>
> case 2)
>     Open applications under NT - Win 3.1 Terminal Program,
>                      Premia CodeWrite 5.1b,
>                     Internet Explorer 4.01
>
>      0 tinyBenchmarks.        16666666 bytecodes/s, 1208527 sends/s
>
> I'm not entirely sure what this means, other than that the PII/450 is capable
of
> performing at the same level as a G3/333 iMac.  The odd thing is that having
the
> Psion emulator running seems to make Squeak run faster!
>
> I don't know if this suggests any VM issues or not, but I thought I'd share
the
> raw data point anyway.
>
>                               -Dean Swan
>                               dean_swan at mitel.com