Getting Low Frame Per second

Troubleshooting General Help
1

What could cause a low fps? It starts around 10 then degrades eventually to 0. I am running long cineamtic btw.



1- if the number of object in the scene is the same (just moving around)



2- memory consumption on the heap is around 2-3GB but it’s like that from the beginning



3- number of vertices is 3712556 but again it’s the same from the beginning



4- I am optimizing using BatchNode it is working just fine.



please give me an idea



thanks



edit: is the larger/longer the cinematic event is the lower the fps goes?

2

If the debug stats basically don’t change then you may want to look to see if your GPU is overheating.

3

not an expert in GPUs but the load on it ranges from 49% to 65% and the temperature is fluctuating around 76

4

and If I crank the cinematics speed up to 5x I get



[java]Nov 30, 2012 4:23:23 PM com.jme3.app.Application handleError

SEVERE: Uncaught exception thrown in Thread[LWJGL Renderer Thread,5,main]

java.lang.NullPointerException

at com.jme3.animation.AnimControl.controlUpdate(AnimControl.java:330)

at com.jme3.scene.control.AbstractControl.update(AbstractControl.java:90)

at com.jme3.scene.Spatial.runControlUpdate(Spatial.java:540)

at com.jme3.scene.Spatial.updateLogicalState(Spatial.java:658)

at com.jme3.scene.Node.updateLogicalState(Node.java:154)

at com.jme3.scene.Node.updateLogicalState(Node.java:154)

at com.jme3.scene.Node.updateLogicalState(Node.java:154)

at com.jme3.scene.Node.updateLogicalState(Node.java:154)

at com.jme3.app.SimpleApplication.update(SimpleApplication.java:246)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.runLoop(LwjglAbstractDisplay.java:149)

at com.jme3.system.lwjgl.LwjglDisplay.runLoop(LwjglDisplay.java:182)

at com.jme3.system.lwjgl.LwjglAbstractDisplay.run(LwjglAbstractDisplay.java:223)

at java.lang.Thread.run(Thread.java:662)[/java]

5

Uh… what version of JME are you running? Line 330 of AnimControl.java doesn’t correspond to anything that could cause an NPE.

6

I am using a nightly for a lot of reasons…



the line 330 is :



[java] /**

  • Internal use only.

    */

    @Override

    protected void controlUpdate(float tpf) {

    if (skeleton != null) {

    skeleton.reset(); // reset skeleton to bind pose

    }



    TempVars vars = TempVars.get();

    for (int i = 0; i < channels.size(); i++) {

    channels.get(i).update(tpf, vars);// <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< line 330

    }

    vars.release();



    if (skeleton != null) {

    skeleton.updateWorldVectors();

    }

    }[/java]



    it’s like it cannot keep up with the animation channels as the animation runs great on cinematic.speed(1)
7

Somehow a null channel is added or you are adding/removing channels from a separate thread and the array list is in a confused state.

8

AnimationFactory takes by default 30 fps shouldn’t help if I reduce that number to say 15?

9
you are adding/removing channels from a separate thread and the array list is in a confused state.


I am doing that... I didn't know that add/removing channels from another thread isn't recommended. I thought only modifying the scene itself (adding/removing nodes)
10
@garnaout said:
I am doing that... I didn't know that add/removing channels from another thread isn't recommended. I thought only modifying the scene itself (adding/removing nodes)


Sigh. I thought you'd been through the code. I thought you'd seen that the list is just an array list.

In general, unless threading is SPECIFICALLY SUPPORTED. Then threading is NOT SUPPORTED.