CODEWITHSUNDEEP
c#wpfcputhrottling
thecaptain0220
thecaptain0220

Reputation: 2168

CPU Throttling Issues with WPF

I am working on an application in WPF using Vlc.DotNet. I was having an issue with the video playing back with a terrible frame rate on my laptop.

After some research I identified that the issue is related to the CPU throttling down. If the laptop power profile is in BatterySaver mode it has the issue. If I switch it to performance, everything works fine. It seems to me like in BatterySaver mode it allows the processor to throttle down, and for some reason doesn't throttle back up correctly when the application needs it to. Is there anyway I can fix this issue?

I tried setting the priority with the code below and it didn't seem to make a difference. 

System.Diagnostics.Process.GetCurrentProcess().PriorityClass = ProcessPriorityClass.High;

Vlc.DotNet updates and ImageSource with the next rendered image. I have this source bound to an Image on the GUI that displays it. I used the WPF Performance Kit and can see what is happening, but not why. As soon as it starts playing, AKA updating the image on the GUI at 30fps, the frame rate of the entire application drops down to around 5fps.

Upvotes: 3

Views: 587

Answers (1)

Nate Noonen
Nate Noonen

Reputation: 1371

Have you tried switching to software rendering to avoid the bottleneck of CPU power downs? I know WPF uses a separate thread for rendering and I'm not sure if you can even access it from Process.Threads. What I've done in the past is attach to the power mode changed event and switched the mode dynamically like this so power mode changes don't switch to hardware rendering. Not sure if this will work as I don't what your specific bottleneck is, but hopefully this points you in a good direction.

Upvotes: 1

Related Questions