MV3D Development Blog

July 29, 2007

Speed Demon!

Filed under: Uncategorized — SirGolan @ 12:29 am

I finally gave in and bought a new PC. I originally purchased my old one in 2002 and other than going up to 1gb ram and a P4 2.6GHz (from 2.4GHz), I haven’t done much with it. Now I have a 3.0GHz Athlon X2 machine with 4GB RAM and a GeForce 8600 + GeForce 6150. That’s right, I can do 4 monitors at once. I’m currently running 3 in XP and Linux, but that’s because I.. uh.. ran out of monitors. I’ll be remedying that on Monday. I also upgraded my wife’s P3 733 machine to a nice P4 2.6, and I’ll be keeping my old machine. Also, upgrading our file server to a P4 2.4 from a P3 500 and giving it mirrored 500GB drives. Pretty nice, and not too expensive since I have all sorts of spare parts around. Anyway, I’ve spent all week getting things working on my PC and Kelly’s. Today I basically started over on mine because WinXP 32bit won’t see all 4GB (it can address 4GB of space, but your PCI devices take up some of that). So now I have WinXP x64 and Ubuntu Feisty x64 both going with the 3 monitors. My poor old desktop doesn’t have any monitors currently and I’m just connecting to it remotely now.

So my PC isn’t the only thing that’s faster. The MV3D client flies now. I took graphics rendering out of the main loop (which runs the physics 20x per second if possible) and instead put it in a cooperator. The main loop is still a looping call because.. well, running it more than 20x/second is bad. On my old system, I’d get 5 physics iterations/second and about 20-30 fps on the graphics. After that change, it is locked at 20 physics iterations and the FPS is >100.

On the new machine, FPS is… Well:

300ish. :) The Python-Ogre terrain demo runs at 800 FPS, which is pretty cool because, like, you know, it’s Python and not C++.

Fun stuff.. On the not so fun side, I found out that something is making copies of the cached objects on the client side instead of increasing the refcount on the original twisted object, and that’s the reason why if the server you are directly connected to crashes, all the objects disappear. Very strange.

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