Huge slowdown on Pentiums.
Archives Forums/Blitz3D Bug Reports/Huge slowdown on Pentiums.
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| Hi! I've been asking this before, but didn't recieved any reply, how to solve this problem. I have noticed vary strange thing, my games runs very slow on pentium processors. I think it is because of small meshes. Zero sized meshes. Here is small test code:
Graphics3D 640,480,16,1
Const UPS=60
ModelGlobal = CreateSphere()
HideEntity ModelGlobal
Type test
Field Model
End Type
For i=1 To 1000
E.test = New test
E\Model=CopyEntity (ModelGlobal)
Size#=0 ;;try to change it to 1 or 0
ScaleEntity E\Model,Size,Size,Size
PositionEntity E\Model,Rnd(-100,100),Rnd(-100,100),Rnd(-100,100)
Next
cam=CreateCamera()
PositionEntity cam,0,0,-200
l=CreateLight()
period=1000/UPS
time=MilliSecs()-period
Repeat
Repeat
elapsed=MilliSecs()-time
Until elapsed
ticks=elapsed/period
tween#=Float(elapsed Mod period)/Float(period)
For k=1 To ticks
time=time+period
If KeyHit(1) End
UpdateWorld
Next
RenderWorld
frames=frames +1
If MilliSecs()-render_time=>1000 Then FPS=frames : frames=0 : render_time=MilliSecs()
Text 0,0,"FPS :"+FPS
Text 0,20,"Tris:"+TrisRendered()
Flip 0
Forever
set Size#=1 and look at results. I think on the Athlons it will be normal(with 0-a lot fps, with 1 - less fps). But who has Pentium will recieve strange results. Here are some results from last test: Pentium 4, 2.4 GHz, intel 845 PE Motherboard, 1.5 GB RAM, Geforce 6800, Windows XP sp2, direct x 9 size#=0 ; results - fps = 6, tri = 0 size#=1 ; results - fps = 92, tri = 218848 An interesting bug there Size=0 FPS=5 Size=1 FPS=58 Tested on P4 2.4/1MB, GF GTS 32MB , 512MB RAM, Win XP Size=0 FPS=7 Tris=0 Size=1 FPS=170 Tris=218848 with entityalpha 0 which I assume has the same affect as size=0 on an AMD (and is the way I would choose to implement it anyhow) Size=1 FPS=1200 Tris=0 in the last 2 the fps was varying by about 5 or so, i.e. it was fluctuating from 168-173. Running on a P4 3.0gig/FX5950Ultra/1gig DDR/win XP And Athlon platforms(here is all ok): Athlon XP 2700+, 512mb ram, Geforce 5700le 256mb, Windows Xp sp2 size#=0; fps = 316, tris = 0 size#=1; fps = 73, tris = 218848 1.4 GHz Athlon, 512 megs RAM, XP Pro SP2, DirectX 9.0c, Radeon 9600 Pro: Size# 0.0 = about 245 FPS, 0 Tris Size# 1.0 = about 79 FPS, 218,848 Tris size = 0: fps = 220 / tris = 0 size = 1: fps = 78 / tris = 218848 XP with DX9.0c; Ubuntu Linux 5.04; AMD XP2600; Radeon 9800. size = 0: fps = 655 / tris = 0 size = 1: fps = 85 / tris = 218848 I ran this on my AMD system listed below. Desktop:2.2GHz AMD 64 3500+ - 1GB Ram - eVga Geforce 6800GT - WinXP Pro SP2 w/Directx 9.0c Laptop: Sager 5660-C, 2.4GHz P4 - 512MB Ram - ATI M9 64MB - WinXP Pro w/DirectX 9.0b |
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| Plaese solve this problem. I've already freezed one game because it runs very slow on pentiums(but very well on Athlons processors). Btw, here are some screens from freezed game ;) _http://artur.ag-tools.com/PacManiac/11-04-05.jpg _http://artur.ag-tools.com/PacManiac/11-04-05_2.jpg And it seems that my new game also has the same problem :( I'm trying not to use zero sized meshes, but there are a lot of animations with scale meshes etc and it is hard to 100% guaranty that during rutime all will be ok. And also problem that I haven't pentium to test all this things. And the strangest thing - why on pentiums?? Why not video drivers problem or something... PS: Sorry for my english. |
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| Interesting... even if one dimension is scaled to 0 or very close like 0.0000000000000000000000000001 it slows down. It should be possible to scale a entity mesh to zero in one dimension and it should still draw the mesh.. tris drawn goes to 0 after scaling even one dimension to 0. Tested yor code on intel Centrino.. I have no idea if it is blitz or directx pentium code or pentium itself.. |
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| Hehe - I was gonna post that "this has been reported before and there doesn't seem to be a fix" - but then I noticed that it was you that reported it so I'll just slope off into my hole again :-) |
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