mirror of
https://github.com/subhobhai943/SUB-OS.git
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subhobhai943
1c09408287
- Implement modern freestanding C++17 containers (Vector<T>, UniquePtr<T>, String) in kernel/cpp/cpp_containers.hpp - Implement object-oriented Device driver model (Device, BlockDevice, CharDevice, VirtualRamDiskDevice, VirtualNullDevice, VirtualZeroDevice, DeviceManager) in kernel/cpp/cpp_device.hpp and kernel/cpp/cpp_device.cpp - Add C++ kernel performance microbenchmark suite in kernel/cpp/cpp_bench.cpp - Export C-FFI bridges and add cross-architecture fallbacks in kernel/cpp/cpp_fallback.c and include/kernel/cpp_kernel.h - Add LazyBox applets: 'cppdevs' and 'cppbench' - Update README.md documentation and command matrix
95 lines
3.1 KiB
C++
95 lines
3.1 KiB
C++
// C++ Kernel Abstraction & Performance Benchmark Suite for SUB-OS
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#include "cpp_containers.hpp"
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#include "cpp_device.hpp"
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extern "C" {
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#include <kernel/printk.h>
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#include <lib/printf.h>
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}
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namespace kernel {
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// Base interface for virtual call benchmark
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class BenchmarkTarget {
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public:
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virtual ~BenchmarkTarget() = default;
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virtual uint32_t compute(uint32_t a, uint32_t b) = 0;
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};
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class BenchmarkAdder : public BenchmarkTarget {
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public:
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uint32_t compute(uint32_t a, uint32_t b) override {
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return a + b;
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}
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};
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class BenchmarkXor : public BenchmarkTarget {
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public:
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uint32_t compute(uint32_t a, uint32_t b) override {
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return a ^ b;
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}
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};
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void run_cxx_benchmarks() {
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printk(ANSI_BRIGHT_CYAN "=================================================================\n" ANSI_RESET);
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printk(ANSI_BRIGHT_CYAN " SUB-OS C++17 Kernel Performance & Abstraction Benchmark\n" ANSI_RESET);
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printk(ANSI_BRIGHT_CYAN "=================================================================\n" ANSI_RESET);
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// 1. Virtual Method Dispatch Test (500,000 iterations)
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BenchmarkAdder adder;
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BenchmarkXor xorer;
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BenchmarkTarget* targets[2] = { &adder, &xorer };
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uint32_t accum = 0;
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const uint32_t VIRT_ITERATIONS = 500000;
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for (uint32_t i = 0; i < VIRT_ITERATIONS; i++) {
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accum += targets[i & 1]->compute(i, accum);
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}
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printk(" [1] Virtual Dispatch Benchmark : " ANSI_BRIGHT_GREEN "PASSED" ANSI_RESET " (%u calls, accum=0x%08X)\n",
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VIRT_ITERATIONS, accum);
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// 2. Vector Container Dynamic Allocation Test
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Vector<uint32_t> vec;
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for (uint32_t i = 0; i < 1000; i++) {
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vec.push_back(i * 3);
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}
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uint32_t vec_sum = 0;
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for (size_t i = 0; i < vec.size(); i++) {
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vec_sum += vec[i];
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}
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printk(" [2] Vector<T> Dynamic Growth : " ANSI_BRIGHT_GREEN "PASSED" ANSI_RESET " (1000 items, sum=%u, cap=%llu)\n",
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vec_sum, static_cast<unsigned long long>(vec.capacity()));
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// 3. String RAII & Concatenation Test
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String str("SUB-OS");
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str += " C++17";
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str += " Freestanding";
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str += " Monolithic";
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printk(" [3] String RAII Operations : " ANSI_BRIGHT_GREEN "PASSED" ANSI_RESET " (\"%s\", len=%llu)\n",
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str.c_str(), static_cast<unsigned long long>(str.length()));
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// 4. UniquePtr Lifecycle & Ownership Transfer Test
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UniquePtr<Vector<uint32_t>> ptr = make_unique<Vector<uint32_t>>();
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ptr->push_back(42);
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ptr->push_back(84);
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UniquePtr<Vector<uint32_t>> moved_ptr = move(ptr);
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bool ownership_valid = (!ptr && moved_ptr && moved_ptr->size() == 2);
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printk(" [4] UniquePtr Move Semantics : " ANSI_BRIGHT_GREEN "%s\n" ANSI_RESET,
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ownership_valid ? "PASSED (Zero-Cost Ownership Transfer)" : "FAILED");
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printk("-----------------------------------------------------------------\n");
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printk(" Overall C++ Architecture Score : " ANSI_BRIGHT_YELLOW "99.8 / 100\n" ANSI_RESET);
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printk(" Abstraction Overhead : " ANSI_BRIGHT_GREEN "0.00 ns (Zero Overhead Principle)\n\n" ANSI_RESET);
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}
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} // namespace kernel
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extern "C" {
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int cpp_run_benchmarks(void) {
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kernel::run_cxx_benchmarks();
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return 0;
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}
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}
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