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View Full Version : Xvid speed on prescott P4 ??


begu
4th February 2004, 11:12
Well, this might be some misunderstanding, but I will post this up:

Quote from Xbitlabs:
"And we again omitted the XviD results due to another surprise that it sprang. In this subtest Prescott performance boost comparing to Northwood made - you won't believe - 232%! Pardon us, but we are not going to use tests which results might depend on anything."
Full article:
http://www.ixbt-labs.com/articles2/roundupmobo/intel-prescott.html


It isn't clear, was the xvid 232% faster, or was there an error. Maybe someone would soon have prescott, and report here. But if that is true -- damn, I need it. :)

Of course, You will need to look the divx 5.1.1 speed graph and note that the prescottt is slower than NW.

But if there is some secret "conspiracy theory" between Xvid developers and intel, then maybe the Xvid uses SSE3 and benefits from longer pipeine thus being ultrafast ;) ;)

But to be real, maybe they did the test somehow wrong, or there is something wrong with the compability between xvid and prescott.. ?
Odd indeed..

sysKin
4th February 2004, 11:52
They're right, these results probably indicate a bug of some sort.

Too bad they didn't tell us which xvid they used. Maybe it's the same problem some people were having with MMX functions? XviD was twice as fast with MMX disabled, but noone ever reproduced that (at least noone who would help determinating the reason).

Unfortunately there is no conspiracy with intel yet (lol) so I can't test or tune P4 performance.

If you ever see me adding VHQ10, SMP support and SSE3 functions, start suspecting the conspiracy :D

Radek

Shinzon
6th February 2004, 17:42
@syskin

Do you plan to optimize Xvid for AMD64 or x86-64 in near future?

Koepi
6th February 2004, 17:45
Shinzon:

just send a full configured and stuffed up computer around a AMD64 or ia64 and he'll do it, for sure! ;)

(Even I would search for the best compiler settings in that case ;) )

Regards
Koepi

Sharktooth
6th February 2004, 19:54
I cant send an AMD64 box to syskin but i can give him a RDP access with full administrator rights on my Dual Opteron 248 server.
Just tell me what software is needed...

Soulhunter
6th February 2004, 20:19
Originally posted by begu
It isn't clear, was the xvid 232% faster, or was there an error... Turbomode v.2... :D

sysKin
7th February 2004, 04:11
Originally posted by Shinzon
Do you plan to optimize Xvid for AMD64 or x86-64 in near future? All SSE2 and 3dNow! optimizations should work with amd64. I hope. Never tried.

Radek

symonjfox
7th February 2004, 06:47
Do you plan to optimize Xvid for AMD64 or x86-64 in near future?
I think we must wait for a stable release version of Windows XP 64 edition (the beta is ready), and also stable 64 bit drivers for any device.

I'm sure that once more 64 bits software is out, Xvid surely will be recompiled for that.

ChronoReverse
7th February 2004, 09:38
And even without recompiling it looks like there could be some REALLY big benefits from moving up to winXP64.

Check this out (http://www.anandtech.com/systems/showdoc.html?i=1961&p=4)