Rendering 1,000,000 sprites. I'm stuck profiling Hi everyone, I am attempting to render 1,000,000 sprites on my screen at 60 FPS. I am using OpenGL persistent mapping. At first, I was using glMapBuffer to do this and I was getting around 32 frames. After using glMapBufferRange / persistent mapping I started getting 34 frames. I have been trying to profile my code and figure out what is going on, and for the life of me, I can't. I know my GPU is just sitting mostly idle. So it is a CPU bottleneck. I fired up VS 2019 CPU profiler and tried to see why my CPU bottlenecked and I can't figure it out. All I know is that my CPU is spending around 70% of its time in the function that maps the sprite What am I supposed to do with the information that my CPU is spending 69% of its time on the opening curly brace?? My render loop is simple enough and it looks like this #define BFE_MAX_SPRITES 1000000 #define BFE_SPRITE_VERTICES 4 #define BFE_SPRITE_INDICES 6 #define BFE_VERTICES_SIZE BFE_MAX_SPRITES * BFE_SPRITE_VERTICES #define BFE_INDICES_SIZE BFE_MAX_SPRITES * BFE_SPRITE_INDICES void SpriteRenderer::Initialize() { BF::Engine::GetContext().SetPrimitiveType(PrimitiveType::Triangles); shader.LoadStandardShader(ShaderType::SpriteRenderer); vertexBufferLayout.Push(0, "POSITION", VertexBufferLayout::DataType::Float2, sizeof(SpriteBuffer), 0); vertexBufferLayout.Push(1, "COLOR", VertexBufferLayout::DataType::Float4, sizeof(SpriteBuffer), sizeof(Vector2f)); vertexBufferLayout.Push(2, "TEXCOORD", VertexBufferLayout::DataType::Float2, sizeof(SpriteBuffer), sizeof(Vector2f) + sizeof(Color)); vertexBufferLayout.Push(3, "RENDERINGTYPE", VertexBufferLayout::DataType::Float, sizeof(SpriteBuffer), sizeof(Vector2f) + sizeof(Color) + sizeof(Vector2f)); unsigned int* indices = new unsigned int[BFE_INDICES_SIZE]; int index = 0; /* Winding order is clock-wise. 0 -> 1 -> 2 ---> 2 -> 3 -> 0 0 1 ______ |\ | | \ | | \ | | \ | | \ | |_____\| 3 2 */ for (unsigned int i = 0; i < BFE_INDICES_SIZE; i += BFE_SPRITE_INDICES) { indices[i + 0] = index + 0; indices[i + 1] = index + 1; indices[i + 2] = index + 2; indices[i + 3] = index + 2; indices[i + 4] = index + 3; indices[i + 5] = index + 0; index += BFE_SPRITE_VERTICES; } vertexBuffer.Create(); vertexBuffer.Allocate(BFE_VERTICES_SIZE * sizeof(SpriteBuffer), nullptr, BufferMode::PersistentMapping); ogSpriteBuffer = (SpriteBuffer*)vertexBuffer.MapPersistentStream(); spriteBuffer = ogSpriteBuffer; indexBuffer.Create(); indexBuffer.SetBuffer(indices, BFE_INDICES_SIZE, BufferMode::StaticDraw); vertexBuffer.SetLayout(shader, &vertexBufferLayout); Engine::GetContext().EnableDepthBuffer(false); Engine::GetContext().EnableBlending(true); Engine::GetContext().EnableScissor(true); delete[] indices; } void SpriteRenderer::Render() { totalDrawCalls = 0; shader.Bind(); MapBuffer(); vertexBuffer.Bind(); indexBuffer.Bind(); Engine::GetContext().Draw(indexCount); indexBuffer.Unbind(); vertexBuffer.Unbind(); totalDrawCalls++; indexCount = 0; currentBoundTexture = nullptr; spriteBuffer = ogSpriteBuffer; } void SpriteRenderer::MapBuffer() { if (submitSprite) { for (size_t i = 0; i < renderLayerManager.renderLayers.size(); i++) { for (size_t j = 0; j < renderLayerManager.renderLayers[i]->renderables.size(); j++) { MapRectangleShapeBuffer((RectangleShape*)renderLayerManager.renderLayers[i]->renderables[j]); } } } } void SpriteRenderer::MapRectangleShapeBuffer(RectangleShape* rectangleShape) { //Top Left spriteBuffer->position = rectangleShape->transfrom->corners[0]; spriteBuffer->color = rectangleShape->color; spriteBuffer->UV = Vector2f(0.0f); spriteBuffer->renderingType = 0; spriteBuffer++; //Top Right spriteBuffer->position = rectangleShape->transfrom->corners[1]; spriteBuffer->color = rectangleShape->color; spriteBuffer->UV = Vector2f(0.0f); spriteBuffer->renderingType = 0; spriteBuffer++; //Bottom Right spriteBuffer->position = rectangleShape->transfrom->corners[2]; spriteBuffer->color = rectangleShape->color; spriteBuffer->UV = Vector2f(0.0f); spriteBuffer->renderingType = 0; spriteBuffer++; //Bottom Left spriteBuffer->position = rectangleShape->transfrom->corners[3]; spriteBuffer->color = rectangleShape->color; spriteBuffer->UV = Vector2f(0.0f); spriteBuffer->renderingType = 0; spriteBuffer++; indexCount += BFE_SPRITE_INDICES; } I don't know where to go from here https://ift.tt/eA8V8J

Hi everyone, I am attempting to render 1,000,000 sprites on my screen at 60 FPS. I am using OpenGL persistent mapping. At first, I was using glMapBuffer to do this and I was getting around 32 frames. After using glMapBufferRange / persistent mapping I started getting 34 frames. I have been trying to profile my code and figure out what is going on, and for the life of me, I can't. I know my GPU is just sitting mostly idle. So it is a CPU bottleneck. I fired up VS 2019 CPU profiler and tried to see why my CPU bottlenecked and I can't figure it out. All I know is that my CPU is spending around 70% of its time in the function that maps the sprite What am I supposed to do with the information that my CPU is spending 69% of its time on the opening curly brace?? My render loop is simple enough and it looks like this #define BFE_MAX_SPRITES 1000000 #define BFE_SPRITE_VERTICES 4 #define BFE_SPRITE_INDICES 6 #define BFE_VERTICES_SIZE BFE_MAX_SPRITES * BFE_SPRITE_VERTICES #define BFE_INDICES_SIZE BFE_MAX_SPRITES * BFE_SPRITE_INDICES void SpriteRenderer::Initialize() { BF::Engine::GetContext().SetPrimitiveType(PrimitiveType::Triangles); shader.LoadStandardShader(ShaderType::SpriteRenderer); vertexBufferLayout.Push(0, "POSITION", VertexBufferLayout::DataType::Float2, sizeof(SpriteBuffer), 0); vertexBufferLayout.Push(1, "COLOR", VertexBufferLayout::DataType::Float4, sizeof(SpriteBuffer), sizeof(Vector2f)); vertexBufferLayout.Push(2, "TEXCOORD", VertexBufferLayout::DataType::Float2, sizeof(SpriteBuffer), sizeof(Vector2f) + sizeof(Color)); vertexBufferLayout.Push(3, "RENDERINGTYPE", VertexBufferLayout::DataType::Float, sizeof(SpriteBuffer), sizeof(Vector2f) + sizeof(Color) + sizeof(Vector2f)); unsigned int* indices = new unsigned int[BFE_INDICES_SIZE]; int index = 0; /* Winding order is clock-wise. 0 -> 1 -> 2 ---> 2 -> 3 -> 0 0 1 ______ |\ | | \ | | \ | | \ | | \ | |_____\| 3 2 */ for (unsigned int i = 0; i < BFE_INDICES_SIZE; i += BFE_SPRITE_INDICES) { indices[i + 0] = index + 0; indices[i + 1] = index + 1; indices[i + 2] = index + 2; indices[i + 3] = index + 2; indices[i + 4] = index + 3; indices[i + 5] = index + 0; index += BFE_SPRITE_VERTICES; } vertexBuffer.Create(); vertexBuffer.Allocate(BFE_VERTICES_SIZE * sizeof(SpriteBuffer), nullptr, BufferMode::PersistentMapping); ogSpriteBuffer = (SpriteBuffer*)vertexBuffer.MapPersistentStream(); spriteBuffer = ogSpriteBuffer; indexBuffer.Create(); indexBuffer.SetBuffer(indices, BFE_INDICES_SIZE, BufferMode::StaticDraw); vertexBuffer.SetLayout(shader, &vertexBufferLayout); Engine::GetContext().EnableDepthBuffer(false); Engine::GetContext().EnableBlending(true); Engine::GetContext().EnableScissor(true); delete[] indices; } void SpriteRenderer::Render() { totalDrawCalls = 0; shader.Bind(); MapBuffer(); vertexBuffer.Bind(); indexBuffer.Bind(); Engine::GetContext().Draw(indexCount); indexBuffer.Unbind(); vertexBuffer.Unbind(); totalDrawCalls++; indexCount = 0; currentBoundTexture = nullptr; spriteBuffer = ogSpriteBuffer; } void SpriteRenderer::MapBuffer() { if (submitSprite) { for (size_t i = 0; i < renderLayerManager.renderLayers.size(); i++) { for (size_t j = 0; j < renderLayerManager.renderLayers[i]->renderables.size(); j++) { MapRectangleShapeBuffer((RectangleShape*)renderLayerManager.renderLayers[i]->renderables[j]); } } } } void SpriteRenderer::MapRectangleShapeBuffer(RectangleShape* rectangleShape) { //Top Left spriteBuffer->position = rectangleShape->transfrom->corners[0]; spriteBuffer->color = rectangleShape->color; spriteBuffer->UV = Vector2f(0.0f); spriteBuffer->renderingType = 0; spriteBuffer++; //Top Right spriteBuffer->position = rectangleShape->transfrom->corners[1]; spriteBuffer->color = rectangleShape->color; spriteBuffer->UV = Vector2f(0.0f); spriteBuffer->renderingType = 0; spriteBuffer++; //Bottom Right spriteBuffer->position = rectangleShape->transfrom->corners[2]; spriteBuffer->color = rectangleShape->color; spriteBuffer->UV = Vector2f(0.0f); spriteBuffer->renderingType = 0; spriteBuffer++; //Bottom Left spriteBuffer->position = rectangleShape->transfrom->corners[3]; spriteBuffer->color = rectangleShape->color; spriteBuffer->UV = Vector2f(0.0f); spriteBuffer->renderingType = 0; spriteBuffer++; indexCount += BFE_SPRITE_INDICES; } I don't know where to go from here

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