[Article] Timing issues in Unreal Tournament

[AnthraX]

I've written a small article about the timing issues in UT. This should hopefully shed some light on why UT is so broken on some multicore systems and a lot of laptops. It also explains why ACE v0.6q forces the UT rendering to stick to one CPU core.

http://utgl.unrealadmin.org/ACE/Timing.txt

[Genecom]

Great article mate, and saved me the hassle on trying to beat that - which ofc wouldn't have been possible

[LeeBe]

nice info m8 good read

[Protos]

Great article very informative

I am glad you are doing your best to prevent speedhacks. I fully support your efforts.

[dodgethis]

Good work anth, have quickly read through your article and as far as I can tell right now theres no false/wrong information in there.

I hope people now understand the problems with multicore systems and why ACE forces them to run on 1 core. (UT itself doesn't benefit (much) from multiple cores anyway)

[rork]

Nice article, very interesting if you're interested in game engines and stuff. It also explains the performance improvements well. I was wondering, are the timing fixes also applied on a linux client and on the server?

There's a small mistake in your code:

else if (OldTime > 0xF0000000 && NewTime < 0x10000000)
	OltTime = NewTime;

return TimeInSec;

Oldtime is spelled wrong, and as far as I understand it it wouldn't change anything for OldTime won't be used after that line again.

[AnthraX]

Originally Posted by rork

Nice article, very interesting if you're interested in game engines and stuff. It also explains the performance improvements well. I was wondering, are the timing fixes also applied on a linux client and on the server?

There's a small mistake in your code:

else if (OldTime > 0xF0000000 && NewTime < 0x10000000)
	OltTime = NewTime;

return TimeInSec;

Oldtime is spelled wrong, and as far as I understand it it wouldn't change anything for OldTime won't be used after that line again.

I don't actually use that code, it was just pseudocode really but if spelled correctly it should work

[lisaa]

Yes, works good now, thanks!


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[Angela1]

Hi everyone. I am a new member to this forum. Nice to meet you all here.

[Larasun]

Hi,

Nice article it was.