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

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• Hash : 022315de
  Author :
  Date : 2016-03-13T08:18:03
  

  D3D: Add perf test for dynamic buffer promotion.
  
  Drawing with a DYNAMIC usage array or element array buffer should
  eventually lead to internally switching to a static usage, if the app
  doesn't modify the data very often. This perf test simply renders a
  bunch of random indexed triangles where both buffers are specified as
  DYNAMIC. It should perform just as well as the static usage after a
  warm-up period.
  
  BUG=angleproject:1334
  
  Change-Id: Ibe432d2122feaefc82d3c11cdf227f93ada82eda
  Reviewed-on: https://chromium-review.googlesource.com/332578
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  Reviewed-by: Kenneth Russell <kbr@chromium.org>
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  

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• src/tests/perf_tests/DynamicPromotionPerfTest.cpp

• //
  // Copyright 2016 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.
  //
  // DynamicPromotionPerfTest:
  //   Tests that ANGLE will promote buffer specfied with DYNAMIC usage to static after a number of
  //   iterations without changing the data. It specifically affects the D3D back-end, which treats
  //   dynamic and static buffers quite differently.
  //
  
  #include "ANGLEPerfTest.h"
  #include "random_utils.h"
  #include "shader_utils.h"
  #include "Vector.h"
  
  using namespace angle;
  
  namespace
  {
  
  struct DynamicPromotionParams final : public RenderTestParams
  {
      DynamicPromotionParams();
      std::string suffix() const override;
  
      size_t vertexCount;
      unsigned int iterations;
  };
  
  DynamicPromotionParams::DynamicPromotionParams() : vertexCount(1024), iterations(4)
  {
  }
  
  std::string DynamicPromotionParams::suffix() const
  {
      return RenderTestParams::suffix();
  }
  
  std::ostream &operator<<(std::ostream &os, const DynamicPromotionParams &params)
  {
      os << params.suffix().substr(1);
      return os;
  }
  
  class DynamicPromotionPerfTest : public ANGLERenderTest,
                                   public testing::WithParamInterface<DynamicPromotionParams>
  {
    public:
      DynamicPromotionPerfTest();
  
      void initializeBenchmark() override;
      void destroyBenchmark() override;
      void drawBenchmark() override;
  
    private:
      GLuint mProgram;
      GLuint mElementArrayBuffer;
      GLuint mArrayBuffer;
  };
  
  DynamicPromotionPerfTest::DynamicPromotionPerfTest()
      : ANGLERenderTest("DynamicPromotion", GetParam()),
        mProgram(0),
        mElementArrayBuffer(0),
        mArrayBuffer(0)
  {
  }
  
  void DynamicPromotionPerfTest::initializeBenchmark()
  {
      const std::string &vertexShaderSource =
          "attribute vec2 position;\n"
          "attribute vec3 color;\n"
          "varying vec3 vColor;\n"
          "void main()\n"
          "{\n"
          "    vColor = color;\n"
          "    gl_Position = vec4(position, 0, 1);\n"
          "}";
  
      const std::string &fragmentShaderSource =
          "varying mediump vec3 vColor;\n"
          "void main()\n"
          "{\n"
          "    gl_FragColor = vec4(vColor, 1);\n"
          "}";
  
      mProgram = CompileProgram(vertexShaderSource, fragmentShaderSource);
      ASSERT_NE(0u, mProgram);
  
      const size_t vertexCount = GetParam().vertexCount;
  
      std::vector<GLushort> indexData;
      std::vector<Vector2> positionData;
      std::vector<Vector3> colorData;
  
      ASSERT_GE(static_cast<size_t>(std::numeric_limits<GLushort>::max()), vertexCount);
  
      RNG rng(1);
  
      for (size_t index = 0; index < vertexCount; ++index)
      {
          indexData.push_back(static_cast<GLushort>(index));
  
          Vector2 position(rng.randomNegativeOneToOne(), rng.randomNegativeOneToOne());
          positionData.push_back(position);
  
          Vector3 color(rng.randomFloat(), rng.randomFloat(), rng.randomFloat());
          colorData.push_back(color);
      }
  
      glGenBuffers(1, &mElementArrayBuffer);
      glGenBuffers(1, &mArrayBuffer);
  
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mElementArrayBuffer);
      glBindBuffer(GL_ARRAY_BUFFER, mArrayBuffer);
  
      GLsizeiptr elementArraySize  = sizeof(GLushort) * vertexCount;
      GLsizeiptr positionArraySize = sizeof(Vector2) * vertexCount;
      GLsizeiptr colorArraySize    = sizeof(Vector3) * vertexCount;
  
      // The DYNAMIC_DRAW usage is the key to the test.
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, elementArraySize, indexData.data(), GL_DYNAMIC_DRAW);
      glBufferData(GL_ARRAY_BUFFER, positionArraySize + colorArraySize, nullptr, GL_DYNAMIC_DRAW);
      glBufferSubData(GL_ARRAY_BUFFER, 0, positionArraySize, positionData.data());
      glBufferSubData(GL_ARRAY_BUFFER, positionArraySize, colorArraySize, colorData.data());
  
      glUseProgram(mProgram);
      GLint positionLocation = glGetAttribLocation(mProgram, "position");
      ASSERT_NE(-1, positionLocation);
      GLint colorLocation = glGetAttribLocation(mProgram, "color");
      ASSERT_NE(-1, colorLocation);
  
      glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, 0, nullptr);
      glVertexAttribPointer(colorLocation, 3, GL_FLOAT, GL_FALSE, 0,
                            reinterpret_cast<const GLvoid *>(positionArraySize));
  
      glEnableVertexAttribArray(positionLocation);
      glEnableVertexAttribArray(colorLocation);
  
      ASSERT_GL_NO_ERROR();
  }
  
  void DynamicPromotionPerfTest::destroyBenchmark()
  {
      glDeleteProgram(mProgram);
      glDeleteBuffers(1, &mElementArrayBuffer);
      glDeleteBuffers(1, &mArrayBuffer);
  }
  
  void DynamicPromotionPerfTest::drawBenchmark()
  {
      unsigned int iterations = GetParam().iterations;
      size_t vertexCount      = GetParam().vertexCount;
  
      glClear(GL_COLOR_BUFFER_BIT);
      for (unsigned int count = 0; count < iterations; ++count)
      {
          glDrawElements(GL_TRIANGLES, static_cast<GLsizei>(vertexCount), GL_UNSIGNED_SHORT, nullptr);
      }
  
      ASSERT_GL_NO_ERROR();
  }
  
  DynamicPromotionParams DynamicPromotionD3D11Params()
  {
      DynamicPromotionParams params;
      params.eglParameters = egl_platform::D3D11();
      return params;
  }
  
  DynamicPromotionParams DynamicPromotionD3D9Params()
  {
      DynamicPromotionParams params;
      params.eglParameters = egl_platform::D3D9();
      return params;
  }
  
  TEST_P(DynamicPromotionPerfTest, Run)
  {
      run();
  }
  
  ANGLE_INSTANTIATE_TEST(DynamicPromotionPerfTest,
                         DynamicPromotionD3D11Params(),
                         DynamicPromotionD3D9Params());
  
  }  // anonymous namespace
  

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