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

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• Hash : 3402d523
  Author :
  Date : 2018-10-30T15:14:52
  

  Try to reduce variance in angle_perftests.
  
  This change does a few things:
  
  - make perf test runner script print % variation instead of stddev
  
  This makes it a bit more clear how much variance there is.
  
  - stabilize CPU in the render perf tests
  
  Setting a thread affinity and priority should stop from switching cores
  during the run. Hopefully can prevent background noise from changing
  the test results.
  
  - warm up the benchmark with a few iterations
  
  This should hopefully make the test results a bit more stable.
  
  - output a new normalized perf result value
  
  The new result is normalized against the number of iterations. So it
  should hopefully be stable even if the number of iterations is changed.
  
  - increases the iteration count in the draw call perf tests.
  
  These tests were completely dominated by SwapBuffers time. Increasing
  the iterations per step means we actually are bottlenecked on CPU time
  instead.
  
  Bug: angleproject:2923
  Change-Id: I5ee347cf93df239ac33b83dc5effe4c21e066736
  Reviewed-on: https://chromium-review.googlesource.com/c/1303679
  Commit-Queue: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
  

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• src/tests/perf_tests/TexSubImage.cpp

• //
  // Copyright (c) 2014 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.
  //
  // TexSubImageBenchmark:
  //   Performace test for ANGLE texture updates.
  //
  
  #include <sstream>
  
  #include "ANGLEPerfTest.h"
  #include "shader_utils.h"
  
  using namespace angle;
  
  namespace
  {
  constexpr unsigned int kIterationsPerStep = 9;
  
  struct TexSubImageParams final : public RenderTestParams
  {
      TexSubImageParams()
      {
          iterationsPerStep = kIterationsPerStep;
  
          // Common default parameters
          majorVersion = 2;
          minorVersion = 0;
          windowWidth  = 512;
          windowHeight = 512;
  
          imageWidth     = 1024;
          imageHeight    = 1024;
          subImageWidth  = 64;
          subImageHeight = 64;
      }
  
      std::string suffix() const override;
  
      // Static parameters
      int imageWidth;
      int imageHeight;
      int subImageWidth;
      int subImageHeight;
  };
  
  std::ostream &operator<<(std::ostream &os, const TexSubImageParams &params)
  {
      os << params.suffix().substr(1);
      return os;
  }
  
  class TexSubImageBenchmark : public ANGLERenderTest,
                               public ::testing::WithParamInterface<TexSubImageParams>
  {
    public:
      TexSubImageBenchmark();
  
      void initializeBenchmark() override;
      void destroyBenchmark() override;
      void drawBenchmark() override;
  
    private:
      GLuint createTexture();
  
      // Handle to a program object
      GLuint mProgram;
  
      // Attribute locations
      GLint mPositionLoc;
      GLint mTexCoordLoc;
  
      // Sampler location
      GLint mSamplerLoc;
  
      // Texture handle
      GLuint mTexture;
  
      // Buffer handle
      GLuint mVertexBuffer;
      GLuint mIndexBuffer;
  
      GLubyte *mPixels;
  };
  
  std::string TexSubImageParams::suffix() const
  {
      // TODO(jmadill)
      return RenderTestParams::suffix();
  }
  
  TexSubImageBenchmark::TexSubImageBenchmark()
      : ANGLERenderTest("TexSubImage", GetParam()),
        mProgram(0),
        mPositionLoc(-1),
        mTexCoordLoc(-1),
        mSamplerLoc(-1),
        mTexture(0),
        mVertexBuffer(0),
        mIndexBuffer(0),
        mPixels(nullptr)
  {
      addExtensionPrerequisite("GL_EXT_texture_storage");
  }
  
  GLuint TexSubImageBenchmark::createTexture()
  {
      const auto &params = GetParam();
  
      // Use tightly packed data
      glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
  
      // Generate a texture object
      GLuint texture;
      glGenTextures(1, &texture);
  
      // Bind the texture object
      glBindTexture(GL_TEXTURE_2D, texture);
  
      glTexStorage2DEXT(GL_TEXTURE_2D, 1, GL_RGBA8, params.imageWidth, params.imageHeight);
  
      // Set the filtering mode
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
      glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
  
      return texture;
  }
  
  void TexSubImageBenchmark::initializeBenchmark()
  {
      const auto &params = GetParam();
  
      const std::string vs =
          R"(attribute vec4 a_position;
          attribute vec2 a_texCoord;
          varying vec2 v_texCoord;
          void main()
          {
              gl_Position = a_position;
              v_texCoord  = a_texCoord;
          })";
  
      const std::string fs =
          R"(precision mediump float;
          varying vec2 v_texCoord;
          uniform sampler2D s_texture;
          void main()
          {
              gl_FragColor = texture2D(s_texture, v_texCoord);
          })";
  
      mProgram = CompileProgram(vs, fs);
      ASSERT_NE(0u, mProgram);
  
      // Get the attribute locations
      mPositionLoc = glGetAttribLocation(mProgram, "a_position");
      mTexCoordLoc = glGetAttribLocation(mProgram, "a_texCoord");
  
      // Get the sampler location
      mSamplerLoc = glGetUniformLocation(mProgram, "s_texture");
  
      // Build the vertex buffer
      GLfloat vertices[] = {
          -0.5f, 0.5f,  0.0f,  // Position 0
          0.0f,  0.0f,         // TexCoord 0
          -0.5f, -0.5f, 0.0f,  // Position 1
          0.0f,  1.0f,         // TexCoord 1
          0.5f,  -0.5f, 0.0f,  // Position 2
          1.0f,  1.0f,         // TexCoord 2
          0.5f,  0.5f,  0.0f,  // Position 3
          1.0f,  0.0f          // TexCoord 3
      };
  
      glGenBuffers(1, &mVertexBuffer);
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
      glBufferData(GL_ARRAY_BUFFER, sizeof(vertices), vertices, GL_STATIC_DRAW);
  
      GLushort indices[] = {0, 1, 2, 0, 2, 3};
      glGenBuffers(1, &mIndexBuffer);
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
      glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(indices), indices, GL_STATIC_DRAW);
  
      // Load the texture
      mTexture = createTexture();
  
      glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
  
      mPixels = new GLubyte[params.subImageWidth * params.subImageHeight * 4];
  
      // Fill the pixels structure with random data:
      for (int y = 0; y < params.subImageHeight; ++y)
      {
          for (int x = 0; x < params.subImageWidth; ++x)
          {
              int offset          = (x + (y * params.subImageWidth)) * 4;
              mPixels[offset + 0] = rand() % 255;  // Red
              mPixels[offset + 1] = rand() % 255;  // Green
              mPixels[offset + 2] = rand() % 255;  // Blue
              mPixels[offset + 3] = 255;           // Alpha
          }
      }
  
      ASSERT_GL_NO_ERROR();
  }
  
  void TexSubImageBenchmark::destroyBenchmark()
  {
      glDeleteProgram(mProgram);
      glDeleteBuffers(1, &mVertexBuffer);
      glDeleteBuffers(1, &mIndexBuffer);
      glDeleteTextures(1, &mTexture);
      delete[] mPixels;
  }
  
  void TexSubImageBenchmark::drawBenchmark()
  {
      // Set the viewport
      glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());
  
      // Clear the color buffer
      glClear(GL_COLOR_BUFFER_BIT);
  
      // Use the program object
      glUseProgram(mProgram);
  
      // Bind the buffers
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
      glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, mIndexBuffer);
  
      // Load the vertex position
      glVertexAttribPointer(mPositionLoc, 3, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat), 0);
      // Load the texture coordinate
      glVertexAttribPointer(mTexCoordLoc, 2, GL_FLOAT, GL_FALSE, 5 * sizeof(GLfloat),
                            reinterpret_cast<void *>(3 * sizeof(GLfloat)));
  
      glEnableVertexAttribArray(mPositionLoc);
      glEnableVertexAttribArray(mTexCoordLoc);
  
      // Bind the texture
      glActiveTexture(GL_TEXTURE0);
      glBindTexture(GL_TEXTURE_2D, mTexture);
  
      // Set the texture sampler to texture unit to 0
      glUniform1i(mSamplerLoc, 0);
  
      ASSERT_GL_NO_ERROR();
  
      const auto &params = GetParam();
  
      for (unsigned int iteration = 0; iteration < params.iterationsPerStep; ++iteration)
      {
          glTexSubImage2D(GL_TEXTURE_2D, 0, rand() % (params.imageWidth - params.subImageWidth),
                          rand() % (params.imageHeight - params.subImageHeight), params.subImageWidth,
                          params.subImageHeight, GL_RGBA, GL_UNSIGNED_BYTE, mPixels);
  
          glDrawElements(GL_TRIANGLES, 6, GL_UNSIGNED_SHORT, 0);
      }
  
      ASSERT_GL_NO_ERROR();
  }
  
  TexSubImageParams D3D11Params()
  {
      TexSubImageParams params;
      params.eglParameters = egl_platform::D3D11();
      return params;
  }
  
  TexSubImageParams D3D9Params()
  {
      TexSubImageParams params;
      params.eglParameters = egl_platform::D3D9();
      return params;
  }
  
  TexSubImageParams OpenGLOrGLESParams()
  {
      TexSubImageParams params;
      params.eglParameters = egl_platform::OPENGL_OR_GLES(false);
      return params;
  }
  
  TexSubImageParams VulkanParams()
  {
      TexSubImageParams params;
      params.eglParameters = egl_platform::VULKAN();
      return params;
  }
  
  }  // namespace
  
  TEST_P(TexSubImageBenchmark, Run)
  {
      run();
  }
  
  ANGLE_INSTANTIATE_TEST(TexSubImageBenchmark,
                         D3D11Params(),
                         D3D9Params(),
                         OpenGLOrGLESParams(),
                         VulkanParams());
  

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