How do I clear the gpu memory occupied by the engine

angus_young · April 10, 2023, 10:10am

I have two playcanvas projects, and I need to switch projects to display. When switching to one of them, I need to destroy the other one. Use the following even a destruction mode, but did not release the gpu memory, repeated switching will accumulate memory, too many times will occupy the memory, I would like to ask what way can be used to clean the engine station memory.

Mode One:
I learned that unlod works, so I wrote down the code

pc.app.assets.filter(asset => asset.type).forEach(ast => {

ast.unload();

});

Mode two:

I used pc.app.destroy() to destroy the engine.

yaustar · April 11, 2023, 11:40am

app.destroy also unloads all the assets

github.com

playcanvas/engine/blob/main/src/framework/app-base.js#L2021

      
        
            this.systems.destroy();
            
            
// layer composition
            if (this.scene.layers) {
                this.scene.layers.destroy();
            }
            
            
// destroy all texture resources
            const assets = this.assets.list();
            for (let i = 0; i < assets.length; i++) {
                assets[i].unload();
                assets[i].off();
            }
            this.assets.off();
            
            

            
// destroy bundle registry
            this.bundles.destroy();
            this.bundles = null;
            
            
this.i18n.destroy();

How are you measuring and do you have a reproducible project on GitHub or similar to investigate?

angus_young · April 25, 2023, 10:04am

I’m sorry, I haven’t been able to work recently due to some family issues. For confidentiality reasons, I cannot disclose the source code, but I have created a demo of my project and uploaded it to GitHub, which you can view at GitHub - sunday20120713/ClearMemoryGPU: issue Memory clearing GPU.

To monitor memory usage, I used the browser’s built-in task manager. Below are screenshots of the initial state and after switching tasks 10 times.

angus_young · April 25, 2023, 10:31am

The following is an effort to reply to your question. Could you please let me know if I can help you locate the issue?

yaustar · April 25, 2023, 11:14am

Can you give explicit step by step instructions reproducing the issue please?