kc3-lang/angle/src/tests/perf_tests/LinkProgramPerfTest.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/LinkProgramPerfTest.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.
  //
  // LinkProgramPerfTest:
  //   Performance tests compiling a lot of shaders.
  //
  
  #include "ANGLEPerfTest.h"
  
  #include <array>
  
  #include "common/vector_utils.h"
  #include "shader_utils.h"
  
  using namespace angle;
  
  namespace
  {
  
  enum class LinkProgramOption
  {
      CompileOnly,
      CompileAndLink,
  
      Unspecified
  };
  
  struct LinkProgramParams final : public RenderTestParams
  {
      LinkProgramParams(LinkProgramOption optionIn)
      {
          iterationsPerStep = 1;
  
          majorVersion = 2;
          minorVersion = 0;
          windowWidth  = 256;
          windowHeight = 256;
          option       = optionIn;
      }
  
      std::string suffix() const override
      {
          std::stringstream strstr;
          strstr << RenderTestParams::suffix();
  
          if (option == LinkProgramOption::CompileOnly)
          {
              strstr << "_compile_only";
          }
  
          if (eglParameters.deviceType == EGL_PLATFORM_ANGLE_DEVICE_TYPE_NULL_ANGLE)
          {
              strstr << "_null";
          }
  
          return strstr.str();
      }
  
      LinkProgramOption option;
  };
  
  std::ostream &operator<<(std::ostream &os, const LinkProgramParams &params)
  {
      os << params.suffix().substr(1);
      return os;
  }
  
  class LinkProgramBenchmark : public ANGLERenderTest,
                               public ::testing::WithParamInterface<LinkProgramParams>
  {
    public:
      LinkProgramBenchmark();
  
      void initializeBenchmark() override;
      void destroyBenchmark() override;
      void drawBenchmark() override;
  
    protected:
      GLuint mVertexBuffer = 0;
  };
  
  LinkProgramBenchmark::LinkProgramBenchmark() : ANGLERenderTest("LinkProgram", GetParam())
  {
  }
  
  void LinkProgramBenchmark::initializeBenchmark()
  {
      std::array<Vector3, 6> vertices = {{Vector3(-1.0f, 1.0f, 0.5f), Vector3(-1.0f, -1.0f, 0.5f),
                                          Vector3(1.0f, -1.0f, 0.5f), Vector3(-1.0f, 1.0f, 0.5f),
                                          Vector3(1.0f, -1.0f, 0.5f), Vector3(1.0f, 1.0f, 0.5f)}};
  
      glGenBuffers(1, &mVertexBuffer);
      glBindBuffer(GL_ARRAY_BUFFER, mVertexBuffer);
      glBufferData(GL_ARRAY_BUFFER, vertices.size() * sizeof(Vector3), vertices.data(),
                   GL_STATIC_DRAW);
  };
  
  void LinkProgramBenchmark::destroyBenchmark()
  {
      glDeleteBuffers(1, &mVertexBuffer);
  }
  
  void LinkProgramBenchmark::drawBenchmark()
  {
      static const char *vertexShader =
          "attribute vec2 position;\n"
          "void main() {\n"
          "    gl_Position = vec4(position, 0, 1);\n"
          "}";
      static const char *fragmentShader =
          "precision mediump float;\n"
          "void main() {\n"
          "    gl_FragColor = vec4(1, 0, 0, 1);\n"
          "}";
      GLuint vs = CompileShader(GL_VERTEX_SHADER, vertexShader);
      GLuint fs = CompileShader(GL_FRAGMENT_SHADER, fragmentShader);
  
      ASSERT_NE(0u, vs);
      ASSERT_NE(0u, fs);
      if (GetParam().option == LinkProgramOption::CompileOnly)
      {
          glDeleteShader(vs);
          glDeleteShader(fs);
          return;
      }
  
      GLuint program = glCreateProgram();
      ASSERT_NE(0u, program);
  
      glAttachShader(program, vs);
      glDeleteShader(vs);
      glAttachShader(program, fs);
      glDeleteShader(fs);
      glLinkProgram(program);
      glUseProgram(program);
  
      GLint positionLoc = glGetAttribLocation(program, "position");
      glVertexAttribPointer(positionLoc, 2, GL_FLOAT, GL_FALSE, 8, nullptr);
      glEnableVertexAttribArray(positionLoc);
  
      // Draw with the program to ensure the shader gets compiled and used.
      glDrawArrays(GL_TRIANGLES, 0, 6);
  
      glDeleteProgram(program);
  }
  
  using namespace egl_platform;
  
  LinkProgramParams LinkProgramD3D11Params(LinkProgramOption option)
  {
      LinkProgramParams params(option);
      params.eglParameters = D3D11();
      return params;
  }
  
  LinkProgramParams LinkProgramD3D9Params(LinkProgramOption option)
  {
      LinkProgramParams params(option);
      params.eglParameters = D3D9();
      return params;
  }
  
  LinkProgramParams LinkProgramOpenGLOrGLESParams(LinkProgramOption option)
  {
      LinkProgramParams params(option);
      params.eglParameters = OPENGL_OR_GLES(false);
      return params;
  }
  
  LinkProgramParams LinkProgramVulkanParams(LinkProgramOption option)
  {
      LinkProgramParams params(option);
      params.eglParameters = VULKAN();
      return params;
  }
  
  TEST_P(LinkProgramBenchmark, Run)
  {
      run();
  }
  
  ANGLE_INSTANTIATE_TEST(LinkProgramBenchmark,
                         LinkProgramD3D11Params(LinkProgramOption::CompileOnly),
                         LinkProgramD3D9Params(LinkProgramOption::CompileOnly),
                         LinkProgramOpenGLOrGLESParams(LinkProgramOption::CompileOnly),
                         LinkProgramVulkanParams(LinkProgramOption::CompileOnly),
                         LinkProgramD3D11Params(LinkProgramOption::CompileAndLink),
                         LinkProgramD3D9Params(LinkProgramOption::CompileAndLink),
                         LinkProgramOpenGLOrGLESParams(LinkProgramOption::CompileAndLink),
                         LinkProgramVulkanParams(LinkProgramOption::CompileAndLink));
  
  }  // anonymous namespace
  

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