The -deterministic 0.2ms may not seem like much at first, but if you are targeting 60fps for your game, 0.2ms is roughly 1% of your 60-Hz frame budget. The wavefront mode for this event is wave64, and so under ideal circumstances there should be 64 threads per wavefront; we only realized 56 of those threads in the average wavefront during this event. While the exact coverage afforded by the Dual Triangle representation seems more prudent at first, the data we’ve collected so far suggests that eliminating the boundary between those two triangles may ultimately be more efficient. We recommend using at least version 4.22 of Unreal Engine, to get the mesh drawing refactor with auto-instancing. The Information tab shows that our pixel shader is only running 1 wavefront and only taking up 32 threads of that wavefront. During inspection, we noted that the Pixel Shader is largely sampling pre-generated textures and averaging the results into the output render target. The relatively small dimensions of each individual 64×64 output region exacerbates this phenomenon as a percentage of overall work. Hey guys, Figured I would write this post to help you avoid running into this nasty issue with UE4 4.22.3. We use optional third-party analytics cookies to understand how you use GitHub.com so we can build better products. Some examples: For the GUI version, set r.ProfileGPU.ShowUI Now that your build is ready for profiling, you should sanity check a few things before getting started. Find the line "; r.XGEShaderCompile = 0" and remove the ";" at the beginning of the line and delete it. Official documentation on migrating assets: https://docs.unrealengine.com/en-US/Engine/Content/Browser/UserGuide/Migrate/index.html. Static analysis may be required depending on your use case and target audience. D:\UE4\Samples\Games\TappyChicken\Saved\ShaderDebugInfo\PCD3D_SM5\M_Egg\LocalVF\BPPSFNoLMPolicy\BasePassPixelShader.usf Finally, the next path is the permutation of features; because we had enabled r.DumpShaderDebugShortNames=1 earlier, the names are compacted (to reduce path length). Even if its factory overclocked. Below is an example of using these arguments with a Test build of the Infiltrator demo. And now does the same every time I boot up. So I went to boot up the older version of the Engine (4.19) that I usually use figuring that I would just sort the issue out with 4.22 another day. in the Built-In Profiling Tools section. Note: if you are using a Test build, either ALLOW_CHEAT_CVARS_IN_TEST From here, the solution to improve the efficiency of organizing existing pixel work is relatively straightforward. The Radeon GPU Profiler (RGP) is a very useful tool for profiling on RDNA GPUs. We can see that the DrawIndexedInstanced() ; 3 is highest quality, but not yet implemented. ConsoleVariables.Ini with working xray. This section contains tips for getting consistent results when profiling, so that you can better determine if a potential optimization actually improved performance. , so that ProfileGPU This section presents general advice for optimization your content and shaders in UE4. Sign Up, it unlocks many cool features! RenderDoc also shows wireframe. For both of these, for some reason. ; Defines what radius the post effect gaussian blur kicks in (The optimization uses slightly less memory and has a quality loss on smallblur radius). That macro is producing the debug markers we see in both Renderdoc and RGP; we’ve found our entry point. ) is available. // First we read from "../../../Engine/Config/ConsoleVariables.ini" [Startup] section if it exists, // This is the only ini file where we allow cheat commands (this is why it's not there for UE_BUILD_SHIPPING || UE_BUILD_TEST), // We also apply from Engine.ini [ConsoleVariables] section, you can read useful information later efficiently. We can also theorize an additional possible benefit to this refactor. In this view, we can see that the event is part of a debug region titled FilterTranslucentVolume, and we will use this information to locate this event in Renderdoc moving forward. When attempting to optimize the execution time of a workload, we need to be able to reliably measure the time a certain workload takes. For more information on the subject, check out these two pages on the Unreal Engine documentation: By submitting your information, you are agreeing to receive news, surveys, and special offers from Unreal Engine and Epic Games. If only we could generate such an app easily! The most important commands pruned from the above list: The stat commands are great for a real-time view of performance, but suppose you find a GPU bottleneck in your scene and wish to dig deeper into a single-frame capture. stat gpu: Shows “live” per-pass timings. Not a member of Pastebin yet? This task is easily handled by returning to the Event timing panel of the EVENTS tab in RGP and clicking the Show details button in the top right corner of the panel. Refer to the official documentation for details: https://docs.unrealengine.com/en-US/Engine/Content/Types/StaticMeshes/HowTo/LODs/index.html. Useful for shader iteration and optimization. © 2004-2020, Epic Games, Inc. All rights reserved. These can serve as a supplement to profiling with RGP. ... (if using SunBeam's unlocker, make sure the IGCSInjector.ini file included with it is also extracted there) Download the console launcher from the Files section, and extract the UE4ConsoleLaunch.exe into the Win64 folder. You can then use -fps UE4Editor.exe ShooterGame -game -nosound -noailogging -noverifygc. However, this data is anecdotal and does not prove anything. When profiling the GPU, you want CPU performance to be fast enough to stay out of the way during profiling. You signed in with another tab or window. そのため、[ProjectPath]/Config/DefaultConsoleVariable.ini や [ProjectPath]/Saved/Config/[Platform]/ConsoleVariable.ini を用意しても [projectpath]/config/DefaultEngine.ini の [ConsoleVariables] セクションに記述することで they're used to log you in. If you are emitting RGP perf markers, you can quickly navigate to the marker that we are investigating by searching for “ PostProcessHistogramReduce and stopfpschart. In one capture, two specific events – right next to each other under this sorting – stand out as an optimization candidate: This pair stands out for a few specific reasons: Before we begin attempting to optimize this event, we should pause to make sure we understand both what it does and how it does it. そのため自分だけこのコンソール変数が弄れれば十分なのに、わざわざサーバーに送信してしまわないようにしていたり、 ; Setting this down from its max of 4 (there's an issue in the editor that causes the first HZB mip pass to go crazy that is apparently linked to this). The 64×64 pink region in every slice of the Highlight Drawcall overlay in the Texture Viewer tab corroborates that information for each other instance, and across the entire output 3D texture space. Because we previously identified that this exact event seems to happen twice, we can also easily demonstrate that we see those 20us savings twice. For more information, see our Privacy Statement. argument causes the engine to use a fixed timestep and a fixed random seed. All sorts of random publicly-available information, assets, scripts, and more as we (Joy Machine) work on our projects. ; Default: 0. Before beginning any debugging exercise in Renderdoc, ensure that UE4 is configured to preserve shader debug information. text 6.15 KB . If you have an overclocked GPU it will crash every time. UE4 crashed immediately and so I restarted the engine, crashes immediately. UE4 calculates scene visibility to cull objects that will not appear in the final image of the frame. Unreal Engine is a large and complex code base, and sometimes it can be difficult to make targeted changes that don’t have side effects. The Vertex and Geometry Shaders do no matrix manipulation against input vertices. With debug information preserved, we can directly see the full HLSL source with all relevant #includes inline and all relevant #ifs already evaluated for each stage of the rendering pipeline by clicking the View button at the top of the stage data panel in the Pipeline State tab. Rather, it runs 211×60=12,660 frames using a fixed timestep of 1/60=16.67 milliseconds. We do need to ensure that the output of our new triangles completely covers every slice of the 3D texture, survives backface culling, and has appropriate texture coordinates. ; ConsoleVariables.ini ; This file allows to set console variables on engine startup (In undefined order). to have the engine automatically shut down after a fixed number of timesteps. This ensures that any UE4 code wrapped in a SCOPED_DRAW_EVENT macro appears as a useful marker in RGP. After taking a performance capture with RDP, these details are available in RGP from the Events->Event Timing view. [ConsoleVariables] iniの階層構造とConsoleVariables.ini ドキュメントにはコンフィグファイルには階層構造があり、基底のパラメータをオーバーライドできるような記述があります。 Selecting the PS pipeline stage brings up additional information specifically about Pixel workloads. One way to profile is by going to the same location in your level. Nothing shows up on my screen, no process starts, I have 4.24.2. You can always update your selection by clicking Cookie Preferences at the bottom of the page. LogConfigを探してみてください。, [projectpath]/Saved/Config/Windows/DefaultEngine.ini の [ConsoleVariables] セクションに設定することで、 GitHub is home to over 50 million developers working together to host and review code, manage projects, and build software together. This expands the details pane, which includes the overall duration of the individual task. Ensure that Sync Views is enabled, and then select the targeted event in the Event Browser. Otherwise, we cannot tell whether it ran faster because of our optimization or because some random number generator decided to spawn fewer particles (for example). Inspecting the source to that function eventually takes us to the function RasterizeToVolumeTexture in the file VolumeRendering.cpp, where we find two things: With our foot now firmly in the door, the remainder of this implementation exercise is carried out in the patch available here. to 1 before running ProfileGPU Test more than one scene, and keep in mind that if your project is dynamic… testing still images may be insufficient to catch all issues. Finally in that folder there will at least be a batch file, a text file and a usf file.
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