|
|
Rendering Slowdown
About Truespace Archives
These pages are a copy of the official truespace forums prior to their removal somewhere around 2011.
They are retained here for archive purposes only.
Rendering Slowdown // Archive: Tech Forum
Post by StewMaster44 // Apr 26, 2008, 6:28pm
|
StewMaster44
Total Posts: 28
|
Does anyone know if the AMD Phenom 9500 or 9600 is causing a rendering slowdown when using the glass shader in tS 4-7? I am wondering if the bug in those processor models is causing my problem...
I'll explain what I am having difficulty with. I am rendering a scene that has a few objects using the glass shader; now my quad-core cpu is running at 100% until it hits the first pixel that contains the glass, then tS drops down to an average of 75% cpu usage. Now, I know that there is something wrong when my single core machine next to it is now rendering the same scene faster then my quad-core (My quad-core is running at 2.2 GHz, while my single-core is at 2.1 GHz). I have tested rendering the scene in tS 5.2, the demo of 6.6, and the demo of 7.51, (all on my quad-core) and they all have the same problem once they hit the glass shader. However, I have only tried the demo of tS 6.6 on my older single core machine.
Anyone have an explanation, or even an opinion to support or reject my hypothesis? |
Post by jamesmc // Apr 26, 2008, 6:55pm
|
jamesmc
Total Posts: 2566
|
I'm unsure if the other versions will handle multi-thread.
But in 7.51, click on the check box to engage multi-thread ( see image after right clicking on the render icon) |
Post by transient // Apr 26, 2008, 7:55pm
|
transient
Total Posts: 977
|
You could try turning off the tlb fix in your bios. It's notorious for slowdowns like this. |
Post by StewMaster44 // Apr 26, 2008, 8:09pm
|
StewMaster44
Total Posts: 28
|
tS 4 through 7 all have multi-threading abilities and it is something I keep checked by default on all of my machines....
Also, I am starting to notice one other curious problem.... I am continuing to work on the same scene, and I am noticing that my quad-core machine is also struggling far more with ffaa then my single-core..... |
Post by StewMaster44 // Apr 26, 2008, 8:19pm
|
StewMaster44
Total Posts: 28
|
You could try turning off the tlb fix in your bios. It's notorious for slowdowns like this.
This is what I was wondering, because the Phenom 9500 and 9600 just use a bios and/or software workaround, which is not supposed to affect most users. But then most users don't produce 3d artwork and run their machines with constant processing for 7 hours straight...:D
If I can find a way to disable the workaround and it fixes this, I will post it out here and I would recommend anyone to think wisely about grabbing the "fixed" 9550 and 9650 models (which were just released), before purchasing a probably discounted "patched" model.... |
Post by StewMaster44 // Apr 27, 2008, 6:56am
|
StewMaster44
Total Posts: 28
|
I checked my bios and I'm not sure I even have the tlb patch. After reading through both AMD and ASUS forums, it sounds like the initial release of the bios didn't include it, which would explain why I couldn't find it anywhere in the bios...
Because of this, I guess I am back to square one...
Just for reference to anyone checking this out, I am using an ASUS M3A motherboard with the initial release 301 bios version. |
Post by TomG // Apr 28, 2008, 4:07am
|
TomG
Total Posts: 3397
|
On checking resource monitor, does one of your cores stop doing anything?
I tested on my Core 2 Duo and Xeon Quad Core, and in both cases (just a scene with some regular spheres and glass spheres, at 4X AA to slow it down) all CPU cores went to 100% and stayed there (and overall CPU monitoring showed 100%).
Also to confirm, this was the Glass shader with default settings rendered under Lightworks in a default scene (so default light set up).
HTH!
Tom |
Post by StewMaster44 // May 11, 2008, 7:58am
|
StewMaster44
Total Posts: 28
|
My apologies about not getting back to you sooner, but I have been preoccupied with getting my last few weeks of high school over with...
This link: http://stewmaster44.googlepages.com/Cup1.scl.zip will give you every scene that I have created from the start of this project... However, I only noticed this problem in the last 10 or 15 saved scenes...
I don't know if I was having the problem before it or not...
Because I made incremental saves, "newscene57" is the scene that I know for a fact I am having trouble with and has been the exact version of the scene under discussion...
I probably wont be able to respond until June... but I will try...
Thanks for all your help!
-Stewart |
Post by StewMaster44 // May 26, 2008, 8:08am
|
StewMaster44
Total Posts: 28
|
I started playing around with the scene to see what has been causing the problem, and so far, I know that the problem only occurs in the scene when ray tracing is enabled... I'll get back with more details... |
|
