kc3-lang/angle/src/tests/perf_tests/VertexArrayPerfTest.cpp

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• Hash : 268653c9
  Author :
  Date : 2021-11-25T13:37:58
  

  Vulkan: Update a test to triger large dirty bit handling
  
  Some traces bind one VBO to a large number of VAOs,and use glBufferData
  to change buffer size frequently,this will cause glBufferData spending
  a lot of time doing VAO dirty bit handling, which leads to high cpu load
  in these traces.This test could triger this issue.
  
  Bug: angleproject:6371
  Change-Id: I99292825b8cb5bba58cc6b37e3baa7adcd02c780
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3301536
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/tests/perf_tests/VertexArrayPerfTest.cpp

• //
  // Copyright 2021 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  // VertexArrayPerfTest:
  //   Performance test for glBindVertexArray.
  //
  
  #include "ANGLEPerfTest.h"
  #include "DrawCallPerfParams.h"
  #include "test_utils/gl_raii.h"
  
  using namespace angle;
  
  namespace
  {
  enum class TestMode
  {
      BufferData,
      BindBuffer,
      UpdateBufferData,
  };
  
  struct VertexArrayParams final : public RenderTestParams
  {
      VertexArrayParams()
      {
          iterationsPerStep = 1;
  
          // Common default params
          majorVersion = 3;
          minorVersion = 0;
          windowWidth  = 720;
          windowHeight = 720;
      }
  
      std::string story() const override;
  
      int numVertexArrays  = 2000;
      int numBuffers       = 5;
      GLuint bufferSize[5] = {384, 1028, 192, 384, 192};
      TestMode testMode    = TestMode::BufferData;
  };
  
  std::ostream &operator<<(std::ostream &os, const VertexArrayParams &params)
  {
      os << params.backendAndStory().substr(1);
      return os;
  }
  
  std::string VertexArrayParams::story() const
  {
      std::stringstream strstr;
  
      strstr << RenderTestParams::story();
  
      if (testMode == TestMode::BindBuffer)
      {
          strstr << "_bindbuffer";
      }
      else if (testMode == TestMode::UpdateBufferData)
      {
          strstr << "_updatebufferdata";
      }
  
      return strstr.str();
  }
  
  class VertexArrayBenchmark : public ANGLERenderTest,
                               public ::testing::WithParamInterface<VertexArrayParams>
  {
    public:
      VertexArrayBenchmark();
  
      void initializeBenchmark() override;
      void destroyBenchmark() override;
      void drawBenchmark() override;
  
      void rebindVertexArray(GLuint vertexArrayID, GLuint bufferID);
      void updateBufferData(GLuint vertexArrayID, GLuint bufferID, GLuint bufferSize);
  
    private:
      std::vector<GLuint> mBuffers;
      GLuint mProgram       = 0;
      GLint mAttribLocation = 0;
      std::vector<GLuint> mVertexArrays;
  };
  
  VertexArrayBenchmark::VertexArrayBenchmark() : ANGLERenderTest("VertexArrayPerf", GetParam()) {}
  
  void VertexArrayBenchmark::initializeBenchmark()
  {
      constexpr char kVS[] = R"(attribute vec4 position;
  attribute float in_attrib;
  varying float v_attrib;
  void main()
  {
      v_attrib = in_attrib;
      gl_Position = position;
  })";
  
      constexpr char kFS[] = R"(precision mediump float;
  varying float v_attrib;
  void main()
  {
      gl_FragColor = vec4(v_attrib, 0, 0, 1);
  })";
  
      mProgram = CompileProgram(kVS, kFS);
      ASSERT_NE(0u, mProgram);
  
      mAttribLocation = glGetAttribLocation(mProgram, "in_attrib");
      ASSERT_NE(mAttribLocation, -1);
  
      // Generate 5 buffers.
      int numBuffers = GetParam().numBuffers;
      mBuffers.resize(numBuffers, 0);
      glGenBuffers(numBuffers, mBuffers.data());
  
      int numVertexArrays = GetParam().numVertexArrays;
      mVertexArrays.resize(numVertexArrays, 0);
      glGenVertexArrays(numVertexArrays, mVertexArrays.data());
  
      // Bind one VBO to all VAOs.
      for (GLuint vertexArray : mVertexArrays)
      {
          rebindVertexArray(vertexArray, mBuffers[0]);
      }
  
      glBindVertexArray(0);
      glBindBuffer(GL_ARRAY_BUFFER, mBuffers[0]);
  }
  
  void VertexArrayBenchmark::rebindVertexArray(GLuint vertexArrayID, GLuint bufferID)
  {
      // Rebind a vertex array object and a generic vertex attribute inside of it.
      glBindVertexArray(vertexArrayID);
      glBindBuffer(GL_ARRAY_BUFFER, bufferID);
      glEnableVertexAttribArray(mAttribLocation);
      glVertexAttribPointer(mAttribLocation, 1, GL_FLOAT, GL_FALSE, 4, nullptr);
      glVertexAttribDivisor(mAttribLocation, 1);
      glBindVertexArray(0);
      glBindBuffer(GL_ARRAY_BUFFER, 0);
  }
  
  void VertexArrayBenchmark::updateBufferData(GLuint vertexArrayID,
                                              GLuint bufferID,
                                              GLuint bufferSize)
  {
      glBindVertexArray(vertexArrayID);
      glBindBuffer(GL_ARRAY_BUFFER, bufferID);
      glEnableVertexAttribArray(mAttribLocation);
      glVertexAttribPointer(mAttribLocation, 1, GL_FLOAT, GL_FALSE, 4, nullptr);
      glBufferData(GL_ARRAY_BUFFER, bufferSize, nullptr, GL_STATIC_DRAW);
      glBindVertexArray(0);
      glBindBuffer(GL_ARRAY_BUFFER, 0);
  }
  
  void VertexArrayBenchmark::destroyBenchmark()
  {
      glDeleteProgram(mProgram);
      glDeleteVertexArrays(static_cast<GLsizei>(mVertexArrays.size()), mVertexArrays.data());
      mVertexArrays.clear();
      glDeleteBuffers(static_cast<GLsizei>(mBuffers.size()), mBuffers.data());
      mBuffers.clear();
  }
  
  void VertexArrayBenchmark::drawBenchmark()
  {
      const VertexArrayParams &params = GetParam();
      if (params.testMode == TestMode::BufferData)
      {
          glBufferData(GL_ARRAY_BUFFER, 128, nullptr, GL_STATIC_DRAW);
      }
      else if (params.testMode == TestMode::UpdateBufferData)
      {
          int bufferSizeIndex = 0;
          for (GLuint vertexArray : mVertexArrays)
          {
              bufferSizeIndex = ((bufferSizeIndex + 1) == 5) ? 0 : (bufferSizeIndex + 1);
              updateBufferData(vertexArray, mBuffers[0], params.bufferSize[bufferSizeIndex]);
          }
      }
      else
      {
          int bufferIndex = 0;
          for (GLuint vertexArray : mVertexArrays)
          {
              bufferIndex = ((bufferIndex + 1) == params.numBuffers) ? 0 : (bufferIndex + 1);
              rebindVertexArray(vertexArray, mBuffers[bufferIndex]);
          }
      }
  }
  
  TEST_P(VertexArrayBenchmark, Run)
  {
      run();
  }
  
  VertexArrayParams VulkanParams()
  {
      VertexArrayParams params;
      params.eglParameters = egl_platform::VULKAN();
      return params;
  }
  
  VertexArrayParams VulkanNullParams(TestMode testMode)
  {
      VertexArrayParams params;
      params.eglParameters = egl_platform::VULKAN_NULL();
      params.testMode      = testMode;
      return params;
  }
  
  GTEST_ALLOW_UNINSTANTIATED_PARAMETERIZED_TEST(VertexArrayBenchmark);
  ANGLE_INSTANTIATE_TEST(VertexArrayBenchmark,
                         VulkanParams(),
                         VulkanNullParams(TestMode::BindBuffer),
                         VulkanNullParams(TestMode::BufferData),
                         VulkanNullParams(TestMode::UpdateBufferData),
                         params::Native(VertexArrayParams()));
  }  // namespace
  

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