[Feat] (MG_Benchmark/BufferBench): Implement BufferBench.

2026-09-07 19:58:32 +09:00 · 2025-09-06 13:10:44 +08:00
parent 6d6bec3d3e
commit 32f2b1fbb6
3 changed files with 212 additions and 1 deletions
@@ -0,0 +1,191 @@
+#include <cstring>
+#include <vector>
+#include <benchmark/benchmark.h>
+
+#include "MG_Impl/GLImpl/Buffer/GL_Buffer.h"
+#include "MG_State/GLState/Core.h"
+
+using namespace MobileGL;
+using namespace MobileGL::MG_Impl::GLImpl;
+
+constexpr GLuint BUFFER_COUNT = 32;
+constexpr GLsizeiptr BUFFER_SIZE = 1024 * 1024;
+
+static void BM_GenerateAndDeleteBuffers(benchmark::State& state) {
+    MG_State::pGLContext = new MG_State::GLState::GLContext();
+
+    GLuint n = static_cast<GLuint>(state.range(0));
+    int repeat = static_cast<int>(state.range(1));
+    std::vector<GLuint> buffers(n);
+
+    for (auto _ : state) {
+        for (int i = 0; i < repeat; i++) {
+            GenBuffers(n, buffers.data());
+            DeleteBuffers(n, buffers.data());
+        }
+    }
+
+    state.SetItemsProcessed(state.iterations() * repeat * n);
+    delete MG_State::pGLContext;
+}
+
+BENCHMARK(BM_GenerateAndDeleteBuffers)
+    ->Args({128, 5})
+    ->Args({1024, 10})
+    ->Args({1536, 16})
+    ->Args({2048, 32})
+    ->Unit(benchmark::kMillisecond)
+    ->UseRealTime();
+
+static void BM_CreateBufferObjectsAndBindBuffer(benchmark::State& state) {
+    MG_State::pGLContext = new MG_State::GLState::GLContext();
+
+    GLuint buffers[BUFFER_COUNT];
+    GenBuffers(BUFFER_COUNT, buffers);
+
+    for (auto _ : state) {
+        for (GLuint i = 0; i < BUFFER_COUNT; i++) {
+            GLenum target = (i % 2 == 0) ? GL_ARRAY_BUFFER : GL_UNIFORM_BUFFER;
+            BindBuffer(target, buffers[i]);
+        }
+    }
+
+    state.SetItemsProcessed(state.iterations() * BUFFER_COUNT);
+
+    DeleteBuffers(BUFFER_COUNT, buffers);
+    delete MG_State::pGLContext;
+}
+BENCHMARK(BM_CreateBufferObjectsAndBindBuffer)->Unit(benchmark::kMillisecond)->UseRealTime();
+
+static void BM_DeleteBufferObjects(benchmark::State& state) {
+    MG_State::pGLContext = new MG_State::GLState::GLContext();
+    std::vector<GLuint> buffers(BUFFER_COUNT);
+
+    for (auto _ : state) {
+        state.PauseTiming();
+        GenBuffers(BUFFER_COUNT, buffers.data());
+        for (GLuint i = 0; i < BUFFER_COUNT; i++) {
+            GLenum target = (i % 2 == 0) ? GL_ARRAY_BUFFER : GL_UNIFORM_BUFFER;
+            BindBuffer(target, buffers[i]);
+        }
+        state.ResumeTiming();
+
+        DeleteBuffers(BUFFER_COUNT, buffers.data());
+    }
+
+    state.SetItemsProcessed(state.iterations() * BUFFER_COUNT);
+    delete MG_State::pGLContext;
+}
+BENCHMARK(BM_DeleteBufferObjects)->Unit(benchmark::kMillisecond)->UseRealTime();
+
+static void BM_UpdateData(benchmark::State& state) {
+    MG_State::pGLContext = new MG_State::GLState::GLContext();
+
+    GLuint buffers[BUFFER_COUNT];
+    GenBuffers(BUFFER_COUNT, buffers);
+
+    for (GLuint i = 0; i < BUFFER_COUNT; i++)
+        BindBuffer(GL_ARRAY_BUFFER, buffers[i]);
+
+    std::vector<char> data(BUFFER_SIZE, 0);
+
+    for (auto _ : state) {
+        for (GLuint i = 0; i < BUFFER_COUNT; i++) {
+            BindBuffer(GL_ARRAY_BUFFER, buffers[i]);
+            BufferData(GL_ARRAY_BUFFER, BUFFER_SIZE, data.data(), GL_STATIC_DRAW);
+        }
+    }
+
+    state.SetItemsProcessed(state.iterations() * BUFFER_COUNT);
+
+    DeleteBuffers(BUFFER_COUNT, buffers);
+    delete MG_State::pGLContext;
+}
+BENCHMARK(BM_UpdateData)->Unit(benchmark::kMillisecond)->UseRealTime();
+
+static void BM_MapBuffer(benchmark::State& state) {
+    MG_State::pGLContext = new MG_State::GLState::GLContext();
+
+    GLuint buffers[BUFFER_COUNT];
+    GenBuffers(BUFFER_COUNT, buffers);
+    for (GLuint i = 0; i < BUFFER_COUNT; i++)
+        BindBuffer(GL_ARRAY_BUFFER, buffers[i]);
+
+    std::vector<char> data(BUFFER_SIZE, 0);
+
+    for (auto _ : state) {
+        for (GLuint i = 0; i < BUFFER_COUNT; i++) {
+            BindBuffer(GL_ARRAY_BUFFER, buffers[i]);
+            BufferData(GL_ARRAY_BUFFER, BUFFER_SIZE, data.data(), GL_DYNAMIC_DRAW);
+
+            void* ptr = MapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
+            if (ptr) {
+                memset(ptr, 1, BUFFER_SIZE);
+                UnmapBuffer(GL_ARRAY_BUFFER);
+            }
+        }
+    }
+
+    state.SetItemsProcessed(state.iterations() * BUFFER_COUNT);
+
+    DeleteBuffers(BUFFER_COUNT, buffers);
+    delete MG_State::pGLContext;
+}
+BENCHMARK(BM_MapBuffer)->Unit(benchmark::kMillisecond)->UseRealTime();
+
+static void BM_CopyBufferSubData(benchmark::State& state) {
+    MG_State::pGLContext = new MG_State::GLState::GLContext();
+
+    GLuint buffers[BUFFER_COUNT];
+    GenBuffers(BUFFER_COUNT, buffers);
+
+    std::vector<char> data(BUFFER_SIZE, 0);
+
+    for (GLuint i = 0; i < BUFFER_COUNT; i++) {
+        GLenum target = (i % 2 == 0) ? GL_COPY_READ_BUFFER : GL_COPY_WRITE_BUFFER;
+        BindBuffer(target, buffers[i]);
+        BufferData(target, BUFFER_SIZE, data.data(), GL_STATIC_DRAW);
+    }
+
+    for (auto _ : state) {
+        for (GLuint i = 0; i < BUFFER_COUNT; i += 2) {
+            BindBuffer(GL_COPY_READ_BUFFER, buffers[i]);
+            BindBuffer(GL_COPY_WRITE_BUFFER, buffers[i + 1]);
+            CopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, 0, 0, BUFFER_SIZE);
+        }
+    }
+
+    state.SetItemsProcessed(state.iterations() * (BUFFER_COUNT / 2));
+
+    DeleteBuffers(BUFFER_COUNT, buffers);
+    delete MG_State::pGLContext;
+}
+BENCHMARK(BM_CopyBufferSubData)->Unit(benchmark::kMillisecond)->UseRealTime();
+
+static void BM_UpdateDataPartially(benchmark::State& state) {
+    MG_State::pGLContext = new MG_State::GLState::GLContext();
+
+    std::vector<GLuint> buffers(BUFFER_COUNT);
+    std::vector<char> data(BUFFER_SIZE / 10, 1);
+
+    GenBuffers(BUFFER_COUNT, buffers.data());
+    for (GLuint i = 0; i < BUFFER_COUNT; i++) {
+        BindBuffer(GL_ARRAY_BUFFER, buffers[i]);
+        BufferData(GL_ARRAY_BUFFER, BUFFER_SIZE, nullptr, GL_DYNAMIC_DRAW);
+    }
+
+    for (auto _ : state) {
+        for (GLuint i = 0; i < BUFFER_COUNT; i++) {
+            BindBuffer(GL_ARRAY_BUFFER, buffers[i]);
+            BufferSubData(GL_ARRAY_BUFFER, BUFFER_SIZE / 2, data.size(), data.data());
+        }
+    }
+
+    state.SetItemsProcessed(state.iterations() * BUFFER_COUNT);
+
+    DeleteBuffers(BUFFER_COUNT, buffers.data());
+    delete MG_State::pGLContext;
+}
+BENCHMARK(BM_UpdateDataPartially)->Unit(benchmark::kMillisecond)->UseRealTime();
+
+BENCHMARK_MAIN();
@@ -0,0 +1,19 @@
+cmake_minimum_required(VERSION 3.24)
+
+add_executable(
+        BufferBench
+        BufferBench.cpp
+)
+
+target_include_directories(BufferBench PRIVATE
+        ${MGL_ROOT}/include
+        ${MGL_ROOT}/MobileGL
+)
+
+target_link_libraries(
+        BufferBench PRIVATE
+        benchmark::benchmark
+        ${LINK_LIBRARIES}
+)
+
+add_test(NAME BufferBench COMMAND BufferBench --benchmark_counters_tabular=true)
@@ -39,4 +39,5 @@ target_link_libraries(

 add_test(NAME SanityBench COMMAND SanityBench --benchmark_counters_tabular=true)

-add_subdirectory(Program)
+add_subdirectory(Program)
+add_subdirectory(Buffer)