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I am working on a WPF application that displays a grid of many images with scrolling/expanding animations that display a video when the user hovers the image.
When this application is run on an Intel CPU + NVidia GPU machine, the animations and video playback are very smooth at a maintained 60fps.
When run on a high-end AMD CPU + ATI GPU, the animations and video playback are noticeably laggy and the frames drop to ~30fps during animations/video playback. However - on these machines, the performance is if the user deactivates the application (e.g. alt-tabbing to another application) and then scrolls/hovers my program behind it to trigger the animations there are no frames dropped. Videos of a side-by-side comparison are linked at the bottom.
The Render Tier on both computers is 2, and enabling software-only rendering does not help address this.
When running a diagnostics session and performing the same animations on both Activated/Deactivated, the drop in frames spike is clearly seen Diagnostics: Red = Activated, Green = Deactivated. The UI thread does not appear to be exceeding 60%-70% at it's peaks,
Does anyone know why there would be a performance difference when my application becomes activated? The desired behaviour is for the animations/playback to always be smooth, as it is when the application is deactivated. It also does not appear to be very close to maxing out the UI thread either, and as far as I know, I have not written any specific tasks that only run if the application is activated.
@cobbsjobs
As far as I know, Win10 and GPU acceleration are only available for Nvidia graphics cards not include AMD graphics cards yet, that may be the reason that your app runs on NVidia GPU device very smoothly. Could you tell me which platform did it target? Framework or .Net Core? If it is possible, could you make your project target to .Net 5 to try?
Thanks for your help! After more testing on various resolutions, the GPU Acceleration significantly improves the performance as long as it's the application window is not activated. So I think AMD are also supported as I can monitor the GPU usage and it does get used when the animations are run.
The application targets Framework, but that's a good idea to try migrating it to .Net 5.
Would you happen to know if this is more likely a driver issue, and therefore would be fixed by a new AMD driver, or more likely something .net/MS related?
I just finished trying the migration to .Net 5 and experienced the same behaviour unfortunately.
In the end it seemed to have more to do with the application being fullscreen.
See how I fixed it
