Sender: wolfi AT netsurf213 DOT neuss DOT netsurf DOT de
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Date: Wed, 14 Jun 2000 07:21:12 +0200
From: Wolfgang Formann <w DOT formann AT netsurf213 DOT neuss DOT netsurf DOT de>
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To: pgcc AT delorie DOT com
Subject: Re: Athlon -- has someone the doku handy?
References: <3946ED8D DOT 7EF4134E AT myokay DOT net>
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Dieter,

processor       : 0
vendor_id       : AuthenticAMD
cpu family      : 6
model           : 2
model name      : AMD Athlon(tm) Processor
stepping        : 1
cpu MHz         : 698.665059
cache size      : 512 KB
fdiv_bug        : no
hlt_bug         : no
sep_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr 6 mce cx8 sep mtrr pge 14 cmov
fcmov 17 22 mmx 24 30 3dnow
bogomips        : 1392.64

Kernel 2.2.14 knows about bit 16 (fcmov) ?? What is going on here?

Wolfgang


Dieter Nützel wrote:
> 
> Hello,
> 
> the are on (for Athlon stepping 1) and two (for Athlon stepping 2) flag
> names missing in the current linux kernel (2.4.0-test1-ac18). Alan Cox
> and I are very pleased if someone of you have the AMD Athlon Programming
> Ref handy?!
> 
> Took some time to get the CD from AMD...
> 
> processor       : 0
> vendor_id       : AuthenticAMD
> cpu family      : 6
> model           : 1
> model name      : AMD-K7(tm) Processor
> stepping        : 2
> cpu MHz         : 548.952604
> cache size      : 512 KB
> fdiv_bug        : no
> hlt_bug         : no
> sep_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 1
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca
> cmov 16 mmxext mmx 3dnowext 3dnow
> bogomips        : 1094.45
> 
> 16 ?
> 
> Now Athlon 800 (nice thing:-)
> 
> processor       : 0
> vendor_id       : AuthenticAMD
> cpu family      : 6
> model           : 2
> model name      : AMD Athlon(tm) Processor
> stepping        : 1
> cpu MHz         : 798.470512
> cache size      : 512 KB
> fdiv_bug        : no
> hlt_bug         : no
> sep_bug         : no
> f00f_bug        : no
> coma_bug        : no
> fpu             : yes
> fpu_exception   : yes
> cpuid level     : 1
> wp              : yes
> flags           : fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca
> cmov 16 pse36 mmxext mmx 24 3dnowext 3dnow
> bogomips        : 1592.52
> 
> 16 & 24 ?
> 
> Thanks,
>         Dieter
> 
> BTW I found the best optimization flags combination for the Athlon.
> GCC-2.96 CVS didn't come close neither with same flags or mcpu=athlon
> and/or march=athlon!!! :-( Why?
> 
> Especially -O (nothing), -mcpu=k6 and -mpreferred-stack-boundary=2 (2
> !!!) is needed.
> 
> !!!-fomit-frame-pointer is worse!!! Don't use it as you can...
> 
> This is the best for an MFLOPS test (dgemm from Quant-X, Alpha FPU test,
> source available).
> 
> -O -mcpu=k6 -mpreferred-stack-boundary=2 -malign-functions=4
> -fschedule-insns2 -fexpensive-optimizations
> 
> K7-550
> 
> gcc -O -funroll-loops -DMAIN -o dgemm dgemm.c
> 
> SunWave1>./dgemm-O
> m:1000 n:1000 k:1000
> Ail_max 24, Blj_max 12, A_row_block 85
> Shimizu's DGEMM : 147.493 MFLOPS(13.560 sec)
> Shimizu's DGEMM : 147.493 MFLOPS(13.560 sec)
> Shimizu's DGEMM : 147.601 MFLOPS(13.550 sec)
> 
> gcc -O -mcpu=k6 -mpreferred-stack-boundary=2 -malign-functions=4
> -fschedule-insns2 -fexpensive-optimizations -DMAIN -o dgemm dgemm.c
> 
> SunWave1>./dgemm-k6
> m:1000 n:1000 k:1000
> Ail_max 24, Blj_max 12, A_row_block 85
> Shimizu's DGEMM : 213.447 MFLOPS( 9.370 sec)
> Shimizu's DGEMM : 213.220 MFLOPS( 9.380 sec)
> Shimizu's DGEMM : 213.220 MFLOPS( 9.380 sec)
> 
> K7-800 got ~222 and ~288
> 
> Any questions?
> 
> --
> Dieter Nützel
> Graduate Student, Computer Science
> 
> University of Hamburg
> Department of Computer Science
> Cognitive Systems Group
> Vogt-Kölln-Straße 30
> D-22527 Hamburg, Germany
> 
> email: nuetzel AT kogs DOT informatik DOT uni-hamburg DOT de
> @home: dieter DOT nuetzel AT myokay DOT net