[Mplayer-users] fastmemcpy benchmark
arpi at thot.banki.hu
Sun Apr 22 16:10:34 CEST 2001
> Am Sonntag, 22. April 2001 12:17 schrieben Sie:
> > Highly interesting....
> > Asus P5A, K6-2/500, G200/16MB. Linux 2.4.3.
> > # ./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
> Hey, where did these come from? They are not in the CVS I get!
> Only the fastmem.sh script is, but not the programs it tries to call!
Run ./c to get them compiled!
> > I had an idea about memory bandwidth of this system sucking big time. But
> > *this* bad...??
> > How come the mga-* test is so much worse than the others? Does this
> > indicate a bug? (Using the module in latest cvs.)
> I don't think so. test mga- version tests graphics memory, which is
> slower than main memory (no caching?)
video memory is always slower than system ram. it goes through your slow
pci/agp (33/66mhz) bus, while system ram is on your 100/200 mhz cpu bus.
A'rpi / Astral & ESP-team
mailto:arpi at thot.banki.hu
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