CCL:Athlon vs. PIII

Tue Feb 20 09:17:03 PST 2001

Dear Dr. Saastad,

> model name      : Pentium III (Coppermine)
> cache size      : 256 KB

> model name      : AMD Athlon(tm) Processor
> cache size      : 64 KB

Great work. However with such a drastical difference in cache size
these tests have very little sense. What you have measured should be
qualified as cache misses but not Athlon CPU speed.

With kind regards,
Victor.

==========================================================================
Victor Anisimov, PhD, Senior Software Researcher - Computational Chemist
FQS Poland, ul. Starowislna 13-15, 31-038 Krakow, Poland
Email: victor at fqspl.com.pl  Tel.(+48 12) 429-4345  Fax(+48 12) 429-6124
==========================================================================

----- Original Message -----
From: Ole W. Saastad <ole at scali.no>
To: <beowulf at beowulf.org>; CCL <CHEMISTRY at ccl.net>
Sent: Tuesday, February 20, 2001 2:36 PM
Subject: CCL:Athlon vs. PIII

>
> I have run a few tests to check the performance of
> Athlon vs. PIII.
> The Atlas (tuned BLAS libs) tests suggest very high
> performance for Athlon, however in real tests like
> Gaussian 98 there is little difference.
>
>
> Summary of performance Athlon vs. PIII
>
> - with Gaussian98 runs.
>
> pgf77 (cache size 512k)
> Athlon:  22 minutes 26.8 seconds.
> PIII:    17 minutes 57.3 seconds.
>
> pgf77 (cache size 64k)
> Athlon:  23 minutes  5.8 seconds.
> PIII:    17 minutes 56.3 seconds.
>
>
> -with Whetstone runs
>
> g77 (Compiled for Athlon) (See below)
> Athlon: Double Whetstone KIPS  602410
> PIII:   Double Whetstone KIPS  574713
>
> g77 (Compiled for Pentium)
> Athlon: Double Whetstone KIPS  602410
> PIII:   Double Whetstone KIPS  581395
>
>
> Detailed results:
>
> Compiled with pgf77.
>
> pgf77  -O2 -tp p6 -Munroll -Mvect=cachesize:524288 -c redund.f
> Cache size 512k.
> Included Blas code compiled.
>
> : ole at pgs1-11:g98-work; g98/g98 form.com
> model name      : Pentium III (Coppermine)
> stepping        : 3
> cpu MHz         : 799.665
> cache size      : 256 KB
>
>
>  SCF Done:  E(UB+HF-LYP) =  -190.288331671     A.U. after   10 cycles
>  Job cpu time:  0 days  0 hours 17 minutes 58.6 seconds.
>  Job cpu time:  0 days  0 hours 17 minutes 57.3 seconds.
>
>
> : ole at pc-10:g98-work; g98/g98 form.com
> model name      : AMD Athlon(tm) Processor
> stepping        : 1
> cpu MHz         : 807.203
> cache size      : 64 KB
>
>
>  SCF Done:  E(UB+HF-LYP) =  -190.288331671     A.U. after   10 cycles
>  Job cpu time:  0 days  0 hours 22 minutes 29.0 seconds.
>  Job cpu time:  0 days  0 hours 22 minutes 26.8 seconds.
>
>
> Athlon run PIII code almost as good as PIII. However, the cache
> size for Athlon is not 512k as PII but 64k.
>
>
> Compiled with pgf77.
>
> pgf77 -O2 -tp p6  -Munroll -Mvect=cachesize:65520 -c unfchk.f
> Cache size 64k.
> Included Blas code compiled.
>
>
> : ole at pgs1-11: g98-work; g98/g98 form.com
> model name      : Pentium III (Coppermine)
> stepping        : 3
> cpu MHz         : 799.665
> cache size      : 256 KB
>
>  SCF Done:  E(UB+HF-LYP) =  -190.288331671     A.U. after   10 cycles
>  Job cpu time:  0 days  0 hours 17 minutes 56.3 seconds.
>
>
> : ole at pc-10:g98-work; g98/g98 form.com
> model name      : AMD Athlon(tm) Processor
> stepping        : 1
> cpu MHz         : 807.203
> cache size      : 64 KB
>
>  SCF Done:  E(UB+HF-LYP) =  -190.288331671     A.U. after   10 cycles
>  Job cpu time:  0 days  0 hours 23 minutes  5.8 seconds.
>
>
>
> Whetstone benchmark:
>
> pc-10:
> model name      : AMD Athlon(tm) Processor
> stepping        : 1
> cpu MHz         : 807.203
> cache size      : 64 KB
>
> pgs1-11:
> model name      : Pentium III (Coppermine)
> stepping        : 3
> cpu MHz         : 799.665
> cache size      : 256 KB
>
>
>
> g77 -o  whetstoned.exe -s -O3 -fomit-frame-pointer -Wall -mathlon
> -mcpu=athlon -march=athlon -malign-functions=4 -funroll-loops
> -fexpensive-optimizations -malign-double -fschedule-insns2
> -mwide-multiply  whetstoned.f
>
>
> ole at pc-10:f77;whetstoned.exe (Athlon)
>
>  Benchmark #2 -- Double Precision Whetstone (A001)
>   Double Whetstone KIPS  602410
> ole at pc-10:f77;
>
>
> ole at pgs1-11:f77;whetstoned.exe (PIII)
>   Double Whetstone KIPS  574713
> ole at pgs1-11:f77;
>
>
> g77 -o  whetstoned.exe -s -O3 -fomit-frame-pointer -Wall -mpentium
> -mcpu=pentium -march=pentium -malign-functions=4 -funroll-loops
> -fexpensive-optimizations -malign-double -fschedule-insns2
> -mwide-multiply  whetstoned.f
>
> : ole at pc-10:f77;whetstoned.exe (Athlon)
>
>  Benchmark #2 -- Double Precision Whetstone (A001)
>   Double Whetstone KIPS  602410
> ole at pc-10:f77;
>
> ole at pgs1-11:f77;whetstoned.exe (PIII)
>   Double Whetstone KIPS  581395
> ole at pgs1-11:f77;
>
>
> gcc patched with patches from the web site:
>
> http://www.athlonlinux.org/
>
>
>
>
> --
> Ole W. Saastad, Dr.Scient.        mailto:ole at scali.no
> Scali, Scalable Linux Systems     http://www.scali.com
>
> Olaf Helsets Vei 6                tel:    +47 22 62 89 68 (direct)
> P.O.Box 70 Bogerud                fax:    +47 22 62 89 51
> N-0621 Oslo                       tel:    +47 22 95 21 45 (home)
> NORWAY
>
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