teal lintel
Hi! I've encountered some weird problem in my game. It's built on the HDRP (17.1.0 to be exact) on Unity 6000.1.12f1. The games runs smoothly with no ram allocation problems, however when i use the Ray Traced Shadows in a realtime light source, the problems happen. If the Ray Traced Shadows option is enabled, the shadows work correctly. However, every frame there's a new memory region allocated, which leads to memory leaks. It's a scale of like 2-5mb's allocated per something about 5 seconds (the Task Manager is updating the ram usage section every 5 seconds so that's where the 5 second ram increase observation comes from). The Ray Tracing itself is not the problem, because the RTGI, reflections etc. don't cause any problems.
At first i thought the entire memory leak was caused by some faulty line in my code, however after further investigations with the Memory Profiler and WPR + WPA (Windows Performance Recorder and Analyzer) i discovered some weird stuff.
In the memory profiler, the memory is in the Untracked section. Specifically in the "Private" and "System Heaps" section.
It confused me because i didn't use any dll's that would interfer with the native memory. After trying to discover the memory leak cause by disabling / enabling most of the features in my game i came to the conclusion that the memory increases ONLY, when any Camera is enabled in my scene. That's where i started to analyze different graphics settings and at the end i found out that the Ray Traced Shadows option (of the Sun's light component in this case) is problematic. By enabling/disabling it, the ram would start leaking (when its enabled) and stop leaking (when its disabled) but without releasing the already allocated memory. Next i built the scene again in IL2CPP (non developenment windows build) and recorded the CPU and VirtualAlloc activity in WPR, then analyzed it further in WPA.
