Athlon vs. PIII

[Brian Haymore]

Ole,
	Your results on Gaussian are interesting in that I see just the
opposite.  With Atlas we see about a 20-30% performance gain with the
athlon over the Piii line.


"Ole W. Saastad" wrote:
> 
> 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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-- 
Brian D. Haymore
University of Utah
Center for High Performance Computing
155 South 1452 East RM 405
Salt Lake City, Ut 84112-0190

Email: brian at chpc.utah.edu - Phone: (801) 585-1755 - Fax: (801) 585-5366