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

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  • Author : Jamie Madill
    Date : 2018-10-30 15:14:52
    Hash : 3402d523
    Message : 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>

  • src/tests/perf_tests/PointSprites.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.
//
// PointSpritesBenchmark:
//   Performance test for ANGLE point sprites.
//
//
#include "ANGLEPerfTest.h"

#include <iostream>
#include <sstream>

#include "shader_utils.h"
#include "random_utils.h"

using namespace angle;

namespace
{
constexpr unsigned int kIterationsPerStep = 100;

struct PointSpritesParams final : public RenderTestParams
{
    PointSpritesParams()
    {
        iterationsPerStep = kIterationsPerStep;

        // Common default params
        majorVersion = 2;
        minorVersion = 0;
        windowWidth = 1280;
        windowHeight = 720;
        count = 10;
        size = 3.0f;
        numVaryings = 3;
    }

    std::string suffix() const override;

    unsigned int count;
    float size;
    unsigned int numVaryings;
};

std::ostream &operator<<(std::ostream &os, const PointSpritesParams &params)
{
    os << params.suffix().substr(1);
    return os;
}

class PointSpritesBenchmark : public ANGLERenderTest,
                              public ::testing::WithParamInterface<PointSpritesParams>
{
  public:
    PointSpritesBenchmark();

    void initializeBenchmark() override;
    void destroyBenchmark() override;
    void drawBenchmark() override;

  private:
    GLuint mProgram;
    GLuint mBuffer;
    RNG mRNG;
};

std::string PointSpritesParams::suffix() const
{
    std::stringstream strstr;

    strstr << RenderTestParams::suffix()
           << "_" << count << "_" << size << "px"
           << "_" << numVaryings << "vars";

    return strstr.str();
}

PointSpritesBenchmark::PointSpritesBenchmark()
    : ANGLERenderTest("PointSprites", GetParam()), mRNG(1)
{
}

void PointSpritesBenchmark::initializeBenchmark()
{
    const auto &params = GetParam();

    std::stringstream vstrstr;

    // Verify "numVaryings" is within MAX_VARYINGS limit
    GLint maxVaryings;
    glGetIntegerv(GL_MAX_VARYING_VECTORS, &maxVaryings);

    if (params.numVaryings > static_cast<unsigned int>(maxVaryings))
    {
        FAIL() << "Varying count (" << params.numVaryings << ")"
               << " exceeds maximum varyings: " << maxVaryings << std::endl;
    }

    vstrstr << "attribute vec2 vPosition;\n"
               "uniform float uPointSize;\n";

    for (unsigned int varCount = 0; varCount < params.numVaryings; varCount++)
    {
        vstrstr << "varying vec4 v" << varCount << ";\n";
    }

    vstrstr << "void main()\n"
               "{\n";

    for (unsigned int varCount = 0; varCount < params.numVaryings; varCount++)
    {
        vstrstr << "    v" << varCount << " = vec4(1.0);\n";
    }

    vstrstr << "    gl_Position = vec4(vPosition, 0, 1.0);\n"
               "    gl_PointSize = uPointSize;\n"
               "}";

    std::stringstream fstrstr;

    fstrstr << "precision mediump float;\n";

    for (unsigned int varCount = 0; varCount < params.numVaryings; varCount++)
    {
        fstrstr << "varying vec4 v" << varCount << ";\n";
    }

    fstrstr << "void main()\n"
               "{\n"
               "    vec4 colorOut = vec4(1.0, 0.0, 0.0, 1.0);\n";

    for (unsigned int varCount = 0; varCount < params.numVaryings; varCount++)
    {
        fstrstr << "    colorOut.r += v" << varCount << ".r;\n";
    }

    fstrstr << "    gl_FragColor = colorOut;\n"
               "}\n";

    mProgram = CompileProgram(vstrstr.str(), fstrstr.str());
    ASSERT_NE(0u, mProgram);

    // Use the program object
    glUseProgram(mProgram);

    glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

    std::vector<float> vertexPositions(params.count * 2);
    for (size_t pointIndex = 0; pointIndex < vertexPositions.size(); ++pointIndex)
    {
        vertexPositions[pointIndex] = mRNG.randomNegativeOneToOne();
    }

    glGenBuffers(1, &mBuffer);
    glBindBuffer(GL_ARRAY_BUFFER, mBuffer);
    glBufferData(GL_ARRAY_BUFFER, vertexPositions.size() * sizeof(float), &vertexPositions[0], GL_STATIC_DRAW);

    GLint positionLocation = glGetAttribLocation(mProgram, "vPosition");
    ASSERT_NE(-1, positionLocation);

    glVertexAttribPointer(positionLocation, 2, GL_FLOAT, GL_FALSE, 0, nullptr);
    glEnableVertexAttribArray(positionLocation);

    // Set the viewport
    glViewport(0, 0, getWindow()->getWidth(), getWindow()->getHeight());

    GLint pointSizeLocation = glGetUniformLocation(mProgram, "uPointSize");
    ASSERT_NE(-1, pointSizeLocation);

    glUniform1f(pointSizeLocation, params.size);

    ASSERT_GL_NO_ERROR();
}

void PointSpritesBenchmark::destroyBenchmark()
{
    glDeleteProgram(mProgram);
    glDeleteBuffers(1, &mBuffer);
}

void PointSpritesBenchmark::drawBenchmark()
{
    glClear(GL_COLOR_BUFFER_BIT);

    const auto &params = GetParam();

    for (unsigned int it = 0; it < params.iterationsPerStep; it++)
    {
        //TODO(jmadill): Indexed point rendering. ANGLE is bad at this.
        glDrawArrays(GL_POINTS, 0, params.count);
    }

    ASSERT_GL_NO_ERROR();
}

PointSpritesParams D3D11Params()
{
    PointSpritesParams params;
    params.eglParameters = egl_platform::D3D11();
    return params;
}

PointSpritesParams D3D9Params()
{
    PointSpritesParams params;
    params.eglParameters = egl_platform::D3D9();
    return params;
}

PointSpritesParams OpenGLOrGLESParams()
{
    PointSpritesParams params;
    params.eglParameters = egl_platform::OPENGL_OR_GLES(false);
    return params;
}

PointSpritesParams VulkanParams()
{
    PointSpritesParams params;
    params.eglParameters = egl_platform::VULKAN();
    return params;
}

} // namespace

TEST_P(PointSpritesBenchmark, Run)
{
    run();
}

ANGLE_INSTANTIATE_TEST(PointSpritesBenchmark,
                       D3D11Params(),
                       D3D9Params(),
                       OpenGLOrGLESParams(),
                       VulkanParams());