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

• //
  // Copyright (c) 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.
  //
  // TexturesPerf:
  //   Performance test for setting texture state.
  //
  
  #include "ANGLEPerfTest.h"
  
  #include <iostream>
  #include <random>
  #include <sstream>
  
  #include "shader_utils.h"
  
  namespace angle
  {
  constexpr unsigned int kIterationsPerStep = 256;
  
  struct TexturesParams final : public RenderTestParams
  {
      TexturesParams()
      {
          iterationsPerStep = kIterationsPerStep;
  
          // Common default params
          majorVersion = 2;
          minorVersion = 0;
          windowWidth  = 720;
          windowHeight = 720;
  
          numTextures                 = 8;
          textureRebindFrequency      = 5;
          textureStateUpdateFrequency = 3;
          textureMipCount             = 8;
  
          webgl = false;
      }
  
      std::string suffix() const override;
      size_t numTextures;
      size_t textureRebindFrequency;
      size_t textureStateUpdateFrequency;
      size_t textureMipCount;
  
      bool webgl;
  };
  
  std::ostream &operator<<(std::ostream &os, const TexturesParams &params)
  {
      os << params.suffix().substr(1);
      return os;
  }
  
  std::string TexturesParams::suffix() const
  {
      std::stringstream strstr;
  
      strstr << RenderTestParams::suffix();
      strstr << "_" << numTextures << "_textures";
      strstr << "_" << textureRebindFrequency << "_rebind";
      strstr << "_" << textureStateUpdateFrequency << "_state";
      strstr << "_" << textureMipCount << "_mips";
  
      if (webgl)
      {
          strstr << "_webgl";
      }
  
      return strstr.str();
  }
  
  class TexturesBenchmark : public ANGLERenderTest,
                            public ::testing::WithParamInterface<TexturesParams>
  {
    public:
      TexturesBenchmark();
  
      void initializeBenchmark() override;
      void destroyBenchmark() override;
      void drawBenchmark() override;
  
    private:
      void initShaders();
      void initTextures();
  
      std::vector<GLuint> mTextures;
  
      GLuint mProgram;
      std::vector<GLuint> mUniformLocations;
  };
  
  TexturesBenchmark::TexturesBenchmark() : ANGLERenderTest("Textures", GetParam()), mProgram(0u)
  {
      setWebGLCompatibilityEnabled(GetParam().webgl);
      setRobustResourceInit(GetParam().webgl);
  }
  
  void TexturesBenchmark::initializeBenchmark()
  {
      const auto &params = GetParam();
  
      // Verify the uniform counts are within the limits
      GLint maxTextureUnits;
      glGetIntegerv(GL_MAX_TEXTURE_IMAGE_UNITS, &maxTextureUnits);
      if (params.numTextures > static_cast<size_t>(maxTextureUnits))
      {
          FAIL() << "Texture count (" << params.numTextures << ")"
                 << " exceeds maximum texture unit count: " << maxTextureUnits << std::endl;
      }
  
      initShaders();
      initTextures();
      glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
      glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());
  
      ASSERT_GL_NO_ERROR();
  }
  
  std::string GetUniformLocationName(size_t idx, bool vertexShader)
  {
      std::stringstream strstr;
      strstr << (vertexShader ? "vs" : "fs") << "_u_" << idx;
      return strstr.str();
  }
  
  void TexturesBenchmark::initShaders()
  {
      const auto &params = GetParam();
  
      std::string vs =
          "void main()\n"
          "{\n"
          "    gl_Position = vec4(0, 0, 0, 0);\n"
          "}\n";
  
      std::stringstream fstrstr;
      for (size_t i = 0; i < params.numTextures; i++)
      {
          fstrstr << "uniform sampler2D tex" << i << ";";
      }
      fstrstr << "void main()\n"
                 "{\n"
                 "    gl_FragColor = vec4(0, 0, 0, 0)";
      for (size_t i = 0; i < params.numTextures; i++)
      {
          fstrstr << "+ texture2D(tex" << i << ", vec2(0, 0))";
      }
      fstrstr << ";\n"
                 "}\n";
  
      mProgram = CompileProgram(vs, fstrstr.str());
      ASSERT_NE(0u, mProgram);
  
      for (size_t i = 0; i < params.numTextures; ++i)
      {
          std::stringstream uniformName;
          uniformName << "tex" << i;
  
          GLint location = glGetUniformLocation(mProgram, uniformName.str().c_str());
          ASSERT_NE(-1, location);
          mUniformLocations.push_back(location);
      }
  
      // Use the program object
      glUseProgram(mProgram);
  }
  
  void TexturesBenchmark::initTextures()
  {
      const auto &params = GetParam();
  
      size_t textureSize = static_cast<size_t>(1) << params.textureMipCount;
      std::vector<GLubyte> textureData(textureSize * textureSize * 4);
      for (auto &byte : textureData)
      {
          byte = rand() % 255u;
      }
  
      for (size_t texIndex = 0; texIndex < params.numTextures; texIndex++)
      {
          GLuint tex = 0;
          glGenTextures(1, &tex);
  
          glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + texIndex));
          glBindTexture(GL_TEXTURE_2D, tex);
          for (size_t mip = 0; mip < params.textureMipCount; mip++)
          {
              GLsizei levelSize = static_cast<GLsizei>(textureSize >> mip);
              glTexImage2D(GL_TEXTURE_2D, static_cast<GLint>(mip), GL_RGBA, levelSize, levelSize, 0,
                           GL_RGBA, GL_UNSIGNED_BYTE, textureData.data());
          }
          mTextures.push_back(tex);
  
          glUniform1i(mUniformLocations[texIndex], static_cast<GLint>(texIndex));
      }
  }
  
  void TexturesBenchmark::destroyBenchmark()
  {
      glDeleteProgram(mProgram);
  }
  
  void TexturesBenchmark::drawBenchmark()
  {
      const auto &params = GetParam();
  
      for (size_t it = 0; it < params.iterationsPerStep; ++it)
      {
          if (it % params.textureRebindFrequency == 0)
          {
              // Swap two textures
              size_t swapTexture = (it / params.textureRebindFrequency) % (params.numTextures - 1);
  
              glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + swapTexture));
              glBindTexture(GL_TEXTURE_2D, mTextures[swapTexture]);
              glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + swapTexture + 1));
              glBindTexture(GL_TEXTURE_2D, mTextures[swapTexture + 1]);
              std::swap(mTextures[swapTexture], mTextures[swapTexture + 1]);
          }
  
          if (it % params.textureStateUpdateFrequency == 0)
          {
              // Update a texture's state
              size_t stateUpdateCount = it / params.textureStateUpdateFrequency;
  
              const size_t numUpdateTextures = 4;
              ASSERT_LE(numUpdateTextures, params.numTextures);
  
              size_t firstTexture = stateUpdateCount % (params.numTextures - numUpdateTextures);
  
              for (size_t updateTextureIdx = 0; updateTextureIdx < numUpdateTextures;
                   updateTextureIdx++)
              {
                  size_t updateTexture = firstTexture + updateTextureIdx;
                  glActiveTexture(static_cast<GLenum>(GL_TEXTURE0 + updateTexture));
  
                  const GLenum minFilters[] = {
                      GL_NEAREST,
                      GL_LINEAR,
                      GL_NEAREST_MIPMAP_NEAREST,
                      GL_LINEAR_MIPMAP_NEAREST,
                      GL_NEAREST_MIPMAP_LINEAR,
                      GL_LINEAR_MIPMAP_LINEAR,
                  };
                  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
                                  minFilters[stateUpdateCount % ArraySize(minFilters)]);
  
                  const GLenum magFilters[] = {
                      GL_NEAREST, GL_LINEAR,
                  };
                  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER,
                                  magFilters[stateUpdateCount % ArraySize(magFilters)]);
  
                  const GLenum wrapParameters[] = {
                      GL_CLAMP_TO_EDGE, GL_REPEAT, GL_MIRRORED_REPEAT,
                  };
                  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S,
                                  wrapParameters[stateUpdateCount % ArraySize(wrapParameters)]);
                  glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T,
                                  wrapParameters[stateUpdateCount % ArraySize(wrapParameters)]);
              }
          }
  
          glDrawArrays(GL_TRIANGLES, 0, 3);
      }
  
      ASSERT_GL_NO_ERROR();
  }
  
  TexturesParams D3D11Params(bool webglCompat)
  {
      TexturesParams params;
      params.eglParameters = egl_platform::D3D11_NULL();
      params.webgl         = webglCompat;
      return params;
  }
  
  TexturesParams D3D9Params(bool webglCompat)
  {
      TexturesParams params;
      params.eglParameters = egl_platform::D3D9_NULL();
      params.webgl         = webglCompat;
      return params;
  }
  
  TexturesParams OpenGLOrGLESParams(bool webglCompat)
  {
      TexturesParams params;
      params.eglParameters = egl_platform::OPENGL_OR_GLES(true);
      params.webgl         = webglCompat;
      return params;
  }
  
  TEST_P(TexturesBenchmark, Run)
  {
      run();
  }
  
  ANGLE_INSTANTIATE_TEST(TexturesBenchmark,
                         D3D11Params(false),
                         D3D11Params(true),
                         D3D9Params(true),
                         OpenGLOrGLESParams(false),
                         OpenGLOrGLESParams(true));
  }  // namespace angle
  

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