Jason Nadro a673e16ce5 Added the ability to do Unreal Insights traces of the Shader Compiler Worker process. ...

This can be enabled by modifying `UnrealEngine\Engine\Saved\UnrealBuildTool\BuildConfiguration.xml` like so:

    <?xml version="1.0" encoding="utf-8" ?>
    <Configuration xmlns="https://www.unrealengine.com/BuildConfiguration">
        <BuildConfiguration>
            <bShaderCompilerWorkerTrace>true</bShaderCompilerWorkerTrace>
        </BuildConfiguration>
    </Configuration>

- Added a build configuration xml value, `bShaderCompilerWorkerTrace`.
- Turning this on will set USE_SHADER_COMPILER_WORKER_TRACE=1
- Move the parameter -nothreading to be set when we launch the process instead of internally as an extra cmd line arg.
- Unreal Insights uses a separate thread to send events so threading support is needed for the program.  When we have USE_SHADER_COMPILER_WORKER_TRACE enabled we need to turn off `-nothreading`.
- When USE_SHADER_COMPILER_WORKER_TRACE is enabled we pass in `-trace=default` to get CPU event markers.
- The SCW program needs to turn on the following defines to be able to perform CPU and memory traces:
	ENABLE_LOW_LEVEL_MEM_TRACKER=1
	UE_MEMORY_TAGS_TRACE_ENABLED=1
	UE_TRACE_ENABLED=1
- Instrument Shader Compiler Worker with TRACE_CPUPROFILER_EVENT_SCOPE.  This are no-ops when this is turned off.

todo: Make the shader compiler worker inherit the trace args from the main process it was launched from.

#rb Yuriy.ODonnell
#jira none
#preflight 634ef80269246074db9637c2

[CL 22625183 by Jason Nadro in ue5-main branch]

2022-10-19 10:33:36 -04:00

..

Private

Added the ability to do Unreal Insights traces of the Shader Compiler Worker process.

2022-10-19 10:33:36 -04:00

ShaderCompileWorker.Build.cs

…

ShaderCompileWorker.Target.cs

Added the ability to do Unreal Insights traces of the Shader Compiler Worker process.

2022-10-19 10:33:36 -04:00