[Mplayer-users] fastmemcpy benchmark

[Felix Buenemann]

On Sonntag, 22. April 2001 15:04 you wrote:
> Am Sonntag, 22. April 2001 14:48 schrieben Sie:
> > # ./fastmem.sh
> >
> > > k6 : v2-v1=915325227 = 1826477us  (54.750fps)   82.1MB/s
> > > mmx: v2-v1=790536059 = 1577468us  (63.393fps)   95.1MB/s
> > > mga-k6 : v2-v1=3012802007 = 6011851us  (16.634fps)   25.0MB/s
> > > mga-mmx: v2-v1=3798322327 = 7579307us  (13.194fps)   19.8MB/s
> >
> > It's really a little slow, here are results to compare (first and second
> > run), system is PIII 750 Coppermine at 930MHz with 512MB SD-RAM (CL3),
> > Board is Abit BX6 2.0 with Intel 440BX chipset:
> >
> > atmosfear:~/develop/mplayer/main/TOOLS # ./fastmem.sh
> > k7 : v2-v1=199387832 = 214239us  (466.768fps)  700.2MB/s
> > mmx: v2-v1=618539835 = 664605us  (150.465fps)  225.7MB/s
> > sse: v2-v1=203580149 = 218742us  (457.160fps)  685.7MB/s
>
> Now that is definitly faster than the memory interface! The benchmark is
> measuring cache speed again... What's the result with video-mem?
>
Don't have mga card so I cant test, but this was first and second run after 
compile, I also tested on my server (PIII 500 Katmai, 256MB SD-RAM (CL2), 
Asus P2B-F i440BX chipset, linux 2.4.2:

k7 : v2-v1=150162130 = 299643us  (333.730fps)  500.6MB/s
mmx: v2-v1=398975774 = 796136us  (125.607fps)  188.4MB/s
sse: v2-v1=156993747 = 313274us  (319.209fps)  478.8MB/s
 
k7 : v2-v1=150158546 = 299635us  (333.739fps)  500.6MB/s
mmx: v2-v1=399123849 = 796431us  (125.560fps)  188.3MB/s
sse: v2-v1=158488407 = 316256us  (316.200fps)  474.3MB/s

But it's know that Sockel 7+ chipsets have a big memory bottleneck as with 
nonintel PII/PIII chipsets (don't remember exactly but I think ALi is fastest 
followed by VIA and SIS are the slowest.)

> gruel
>
> /*  AMD K6 200Mhz, 128 MB PC66-SDRAM, FIC PA-2007, 1MB L2-Cache)
>     mmx: v2-v1=1035809490 = 5167235us  (19.353fps)   29.0MB/s   */
>

-- 
Best Regards,
   Felix

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