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Dais
l33t
Joined: 05 Aug 2004
Posts: 977
Location: Québec
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 Posted: Mon Jan 31, 2005 3:42 pm Post subject: AGPGart or NVAGP ? |
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Hi,
I'd like to know if you think I should use AGPGart (on the kernel) or NVidia AGP (with the official drivers) for good performances.
In fact, I tried cj-sources (like ck-sources + software suspend + others little things) instead of my gentoo-dev-sources, and I saw some problems with Warcraft 3 (like game lagging), but I also changed from AGPGart to NVAGP, and I suspect this change to be the problem for my performances dropping sometimes ..
Am I right, or should I search my answer with the kernel ?
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srlinuxx
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Joined: 22 Nov 2003
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| Posted: Mon Jan 31, 2005 4:16 pm Post subject: |
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This has been discussed several times (the duplicate post police are closing in as we speak) and I've come to the conclusion it's dependent on many factors. Best thing to do is try them both and use whichever works best for you. NvAGP works best for me on my kt400, 6800, and 2.6.x gentoo-dev-sources.
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wolf31o2
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Joined: 31 Jan 2003
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Location: Mountain View, CA
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| Posted: Mon Jan 31, 2005 6:13 pm Post subject: |
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Also, sources based on ck-sources are probably the worst for gaming, as they are tuned for interactive desktop performance. This means that by design they "share the load" more equally between processes that require little CPU time and ones which are long running and require a lot fo CPU time (read: Games). Essentially, if you're running a ck-based kernel, you are robbing your games of CPU time unecessarily. If you don't play games and only use your computer as a desktop, then the ck-based sources are great.
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float-
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Joined: 31 Aug 2003
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| Posted: Mon Jan 31, 2005 6:26 pm Post subject: |
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| funny, I thought old gaming-sources were slightly modified ck-sources. |
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float-
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| Posted: Mon Jan 31, 2005 6:31 pm Post subject: |
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| btw, I've also got better results with NvAGP on my system (gentoo-dev-sources). |
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Dais
l33t
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Location: Québec
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| Posted: Mon Jan 31, 2005 7:09 pm Post subject: |
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OK, so i'll forget the ck-sources and cj-sources for now, and try NVAGP to see if I see differences 
But then, what patch(es) is/are making games lagging in the ck-sources ?
I'm going to make a search for what sources seem to be popular for gaming
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Need4Speed
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Joined: 06 Jun 2004
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| Posted: Mon Jan 31, 2005 7:39 pm Post subject: |
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| wolf31o2 wrote: | | Also, sources based on ck-sources are probably the worst for gaming, as they are tuned for interactive desktop performance. This means that by design they "share the load" more equally between processes that require little CPU time and ones which are long running and require a lot fo CPU time (read: Games). Essentially, if you're running a ck-based kernel, you are robbing your games of CPU time unecessarily. If you don't play games and only use your computer as a desktop, then the ck-based sources are great. |
so what source would you recommend for gaming? |
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float-
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Joined: 31 Aug 2003
Posts: 174
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| Posted: Mon Jan 31, 2005 7:41 pm Post subject: |
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| gentoo-dev-sources are not patched with the desktop optimized patches, heard other devs recommend it. |
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jonnevers
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Joined: 02 Jan 2003
Posts: 1594
Location: Gentoo64 land
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| Posted: Mon Jan 31, 2005 7:44 pm Post subject: |
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| I tried NVAgp last week on my box.... I forgot I set that in xorg.conf and got very frustrated when I couldn't get above 9 fps in ut2004. I tried old stable kernels I have back-up ofs, same fps (9 was the max :-/ ), finally removed the directive from xorg.conf so that AGPgart would be used and I'm back at 50-60 fps... |
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deadstar
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| Posted: Mon Jan 31, 2005 7:51 pm Post subject: |
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AGPGART and NvAGP work differently depending on your system.
Why not try both? Compile AGPGART into the kernel, make sure you have the latest NVIDIA drivers, and its just a case of setting "NvAGP" to 2 or 3 in your xorg.conf. Then run some benchmarks. I use 3DMark 2000 under cedega.
Personally, I found that AGPGART works better, but on my old system (P4 2.8ghz, 512MB Ram,
nVidia ti4800) it was the other way round.
And post your results, I'd be interested to know how it goes.
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Need4Speed
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| Posted: Mon Jan 31, 2005 7:56 pm Post subject: |
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wolf31o2
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Joined: 31 Jan 2003
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Location: Mountain View, CA
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| Posted: Tue Feb 01, 2005 7:55 pm Post subject: |
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| float- wrote: | | funny, I thought old gaming-sources were slightly modified ck-sources. |
They were... back when ck-sources was 2.4-based. There is no way to compare ck-sources from 2.4 with ck-sources from 2.6, as they are wholly different beasts. The problem with the current ck-sources is the staircase scheduler, along with some of the other interactivity patches.
| Need4Speed wrote: | | so what source would you recommend for gaming? |
I would recommend gentoo-dev-sources.
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Iron_DragonLord
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Joined: 04 Nov 2004
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| Posted: Wed Feb 02, 2005 1:02 am Post subject: |
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| Excuse my newbieness, but how does one enable NvAGP? I'd like to try it out. Is it simply adding the previously said line to my xorg.conf file? |
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Dais
l33t
Joined: 05 Aug 2004
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Location: Québec
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| Posted: Wed Feb 02, 2005 2:00 pm Post subject: |
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You must remove agpgart from your kernel configuration (it must NEITHER be in the kernel, NOR in module).
Then, in your xorg.conf, "NVAgp" (not sure about the typo) must be to "3", and your nvidia module must be launched.
reboot
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COiN3D
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Joined: 02 Aug 2004
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Location: Munich, Germany
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| Posted: Thu Feb 03, 2005 6:23 pm Post subject: |
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| deadstar wrote: | AGPGART and NvAGP work differently depending on your system.
Why not try both? Compile AGPGART into the kernel, make sure you have the latest NVIDIA drivers, and its just a case of setting "NvAGP" to 2 or 3 in your xorg.conf. Then run some benchmarks. I use 3DMark 2000 under cedega.
Personally, I found that AGPGART works better, but on my old system (P4 2.8ghz, 512MB Ram,
nVidia ti4800) it was the other way round.
And post your results, I'd be interested to know how it goes. |
That's only possible if you compile AGPGART as a module. If not, you wont be able to change to NVAGP.
I personally didn't recognize any difference (with my TI 4200), so i think it's all the same.
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deadstar
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Location: England
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| Posted: Thu Feb 03, 2005 7:00 pm Post subject: |
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| deadstar wrote: | | Compile AGPGART into the kernel |
Yeah sorry I realised that when I got home! My bad...
I get a *small* peformance increase from using NvAGP, but not really enough to be worth the effort. Glxgears shows about 10-20 FPS more that AGPGART, but yeah I know its not the most reliable benchmark in the world.
Which leads me to another question - is there eny way to get the ATI Fglrxgears program to work under nVidia? Back when I was messing around wityh ATI cards just to see if I could get it to work, i found that the gears bench was much more, well, ace! Or am I chasing ghosts.
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