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#jira none #rb zach.bethel, mihnea.balta, florin.pascu #preflight 61312f4a79ce170001d4a79e #ROBOMERGE-SOURCE: CL 17422777 in //UE5/Main/... #ROBOMERGE-BOT: STARSHIP (Main -> Release-Engine-Test) (v865-17346139) #ROBOMERGE[bot1]: emt [CL 17422941 by christopher waters in ue5-release-engine-test branch]
101 lines
3.7 KiB
C++
101 lines
3.7 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#include "LongGPUTask.h"
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#include "OneColorShader.h"
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#include "PipelineStateCache.h"
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#include "RHIStaticStates.h"
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#include "RenderUtils.h"
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#include "ClearQuad.h"
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IMPLEMENT_SHADER_TYPE(, FLongGPUTaskPS, TEXT("/Engine/Private/OneColorShader.usf"), TEXT("MainLongGPUTask"), SF_Pixel);
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int32 NumMeasuredIterationsToAchieve500ms = 0;
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void IssueScalableLongGPUTask(FRHICommandListImmediate& RHICmdList, int32 NumIteration /* = -1 by default */)
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{
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FRHIResourceCreateInfo Info(TEXT("LongTaskRenderTarget"));
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FTexture2DRHIRef LongTaskRenderTarget = RHICreateTexture2D(1920, 1080, PF_B8G8R8A8, 1, 1, TexCreate_RenderTargetable, Info);
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FRHIRenderPassInfo RPInfo(LongTaskRenderTarget, ERenderTargetActions::DontLoad_Store);
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TransitionRenderPassTargets(RHICmdList, RPInfo);
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RHICmdList.BeginRenderPass(RPInfo, TEXT("LongGPUTask"));
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{
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FGraphicsPipelineStateInitializer GraphicsPSOInit;
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RHICmdList.ApplyCachedRenderTargets(GraphicsPSOInit);
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GraphicsPSOInit.BlendState = TStaticBlendState<>::GetRHI();
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GraphicsPSOInit.RasterizerState = TStaticRasterizerState<>::GetRHI();
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GraphicsPSOInit.DepthStencilState = TStaticDepthStencilState<false, CF_Always>::GetRHI();
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auto ShaderMap = GetGlobalShaderMap(GMaxRHIFeatureLevel);
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TShaderMapRef<TOneColorVS<true>> VertexShader(ShaderMap);
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TShaderMapRef<FLongGPUTaskPS> PixelShader(ShaderMap);
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GraphicsPSOInit.BoundShaderState.VertexDeclarationRHI = GetVertexDeclarationFVector4();
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GraphicsPSOInit.BoundShaderState.VertexShaderRHI = VertexShader.GetVertexShader();
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GraphicsPSOInit.BoundShaderState.PixelShaderRHI = PixelShader.GetPixelShader();
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GraphicsPSOInit.PrimitiveType = PT_TriangleStrip;
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SetGraphicsPipelineState(RHICmdList, GraphicsPSOInit, 0);
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VertexShader->SetDepthParameter(RHICmdList, 0.0f);
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RHICmdList.SetStreamSource(0, GClearVertexBuffer.VertexBufferRHI, 0);
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if (NumIteration == -1)
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{
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NumIteration = NumMeasuredIterationsToAchieve500ms;
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}
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for (int32 Iteration = 0; Iteration < NumIteration; Iteration++)
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{
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RHICmdList.DrawPrimitive(0, 2, 1);
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}
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}
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RHICmdList.EndRenderPass();
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}
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void MeasureLongGPUTaskExecutionTime(FRHICommandListImmediate& RHICmdList)
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{
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const int32 NumIterationsForMeasurement = 5;
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FRenderQueryPoolRHIRef TimerQueryPool = RHICreateRenderQueryPool(RQT_AbsoluteTime, 2);
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FRHIPooledRenderQuery TimeQueryStart = TimerQueryPool->AllocateQuery();
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FRHIPooledRenderQuery TimeQueryEnd = TimerQueryPool->AllocateQuery();
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if (!GSupportsTimestampRenderQueries)
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{
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// Not all platforms/drivers support RQT_AbsoluteTime queries
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// Use fixed number of iterations on those platforms
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NumMeasuredIterationsToAchieve500ms = 5;
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return;
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}
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uint64 StartTime = 0;
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uint64 EndTime = 0;
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RHICmdList.EndRenderQuery(TimeQueryStart.GetQuery());
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IssueScalableLongGPUTask(RHICmdList, NumIterationsForMeasurement);
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RHICmdList.EndRenderQuery(TimeQueryEnd.GetQuery());
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// Required by DX12 to resolve the query
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RHICmdList.SubmitCommandsHint();
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RHICmdList.ImmediateFlush(EImmediateFlushType::FlushRHIThread);
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if (RHICmdList.GetRenderQueryResult(TimeQueryStart.GetQuery(), StartTime, true) && RHICmdList.GetRenderQueryResult(TimeQueryEnd.GetQuery(), EndTime, true))
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{
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NumMeasuredIterationsToAchieve500ms = FMath::Clamp(FMath::FloorToInt(500.0f / ((EndTime - StartTime) / 1000.0f / NumIterationsForMeasurement)), 1, 2000);
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}
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else
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{
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// Sometimes it fails even the platform supports RQT_AbsoluteTime
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// Fallback and show a warning
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NumMeasuredIterationsToAchieve500ms = 5;
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UE_LOG(LogTemp, Display, TEXT("Unable to get render query result on a platform supporting RQT_AbsoluteTime queries, defaulting to %d iterations for LongGPUTask"), NumMeasuredIterationsToAchieve500ms);
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}
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}
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