Re: [CFT] faster athlon/duron memory copy implementation

From: Simon Fowler (simon@himi.org)
Date: Thu Oct 24 2002 - 13:50:25 EST

On Fri, Oct 25, 2002 at 04:43:28AM +1000, Simon Fowler wrote:
> On Thu, Oct 24, 2002 at 07:15:43PM +0200, Manfred Spraul wrote:
> > AMD recommends to perform memory copies with backward read operations
> > instead of prefetch.
> >
> > http://208.15.46.63/events/gdc2002.htm
> >
> > Attached is a test app that compares several memory copy implementations.
> > Could you run it and report the results to me, together with cpu,
> > chipset and memory type?
> >
> > Please run 2 or 3 times.
> >
> simon@caccini:~/hacking$ cat /proc/cpuinfo
> processor : 0
> vendor_id : AuthenticAMD
> cpu family : 6
> model : 1
> model name : AMD-K7(tm) Processor
> stepping : 2
> cpu MHz : 553.880
> cache size : 512 KB
> fdiv_bug : no
> hlt_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 pat mmx syscall mmxext 3dnowext 3dnow
> bogomips : 1104.28
>
00:00.0 Host bridge: Advanced Micro Devices [AMD] AMD-751 [Irongate] System Controller (rev 25)
00:01.0 PCI bridge: Advanced Micro Devices [AMD] AMD-751 [Irongate] AGP Bridge (rev 01)

Generic PC100 and PC133 DIMM - both 256MB.

Simon 

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