From 1ca25b2ebbd4f36394c1273852f7913e1d307aee Mon Sep 17 00:00:00 2001 From: ZZZJ <3056485198@qq.com> Date: Wed, 10 Dec 2025 22:57:59 +0800 Subject: [PATCH] fixes Fold #196 --- S1/ZZZJ_#196/fold_cuda.py | 164 +++++++++++++++++++++++++++++++++++++ S1/ZZZJ_#196/fold_torch.py | 36 ++++++++ S1/ZZZJ_#196/prompt.txt | 44 ++++++++++ S1/ZZZJ_#196/run_code.py | 74 +++++++++++++++++ 4 files changed, 318 insertions(+) create mode 100644 S1/ZZZJ_#196/fold_cuda.py create mode 100644 S1/ZZZJ_#196/fold_torch.py create mode 100644 S1/ZZZJ_#196/prompt.txt create mode 100644 S1/ZZZJ_#196/run_code.py diff --git a/S1/ZZZJ_#196/fold_cuda.py b/S1/ZZZJ_#196/fold_cuda.py new file mode 100644 index 00000000..4a4c27d1 --- /dev/null +++ b/S1/ZZZJ_#196/fold_cuda.py @@ -0,0 +1,164 @@ +import torch +import torch.nn as nn +from torch.utils.cpp_extension import load_inline + +class ModelNew(nn.Module): + def __init__(self): + super().__init__() + self.kernel_size = 3 + self.stride = 1 + self.padding = 1 + self.height = 64 + self.width = 64 + self._compile_cuda_kernel() + + def _compile_cuda_kernel(self): + cpp_source = """ + #include + torch::Tensor fold_cuda(torch::Tensor input, int output_h, int output_w, int k_size, int stride, int padding); + """ + + cuda_source = """ + #include + + #define BLOCK_SIZE 256 + + __global__ void fold_gather_f4_kernel( + const float* __restrict__ input, + float* __restrict__ output, + int n_vec, + int batch, + int channels, + int out_h, + int out_w, + int k_size, + int stride, + int padding, + int L_in + ) { + int idx = blockIdx.x * blockDim.x + threadIdx.x; + if (idx >= n_vec) return; + + int w_vec_dim = out_w / 4; + + int tmp = idx; + int w_vec = tmp % w_vec_dim; tmp /= w_vec_dim; + int h = tmp % out_h; tmp /= out_h; + int c = tmp % channels; + int b = tmp / channels; + + int w_start = w_vec * 4; + + float sum0 = 0.0f, sum1 = 0.0f, sum2 = 0.0f, sum3 = 0.0f; + + long long input_batch_offset = (long long)b * (channels * k_size * k_size * L_in); + + for (int kh = 0; kh < k_size; ++kh) { + int dist_h = h + padding - kh; + + if (dist_h % stride == 0) { + int win_h = dist_h / stride; + + int grid_w = (out_w + 2 * padding - k_size) / stride + 1; + int grid_h = (out_h + 2 * padding - k_size) / stride + 1; + + if (win_h >= 0 && win_h < grid_h) { + + + for (int kw = 0; kw < k_size; ++kw) { + + // Input Channel Offset: c * K*K + kh*K + kw + int c_in_idx = c * k_size * k_size + kh * k_size + kw; + long long input_channel_ptr = input_batch_offset + (long long)c_in_idx * L_in; + + int dist_w0 = w_start + 0 + padding - kw; + int dist_w1 = w_start + 1 + padding - kw; + int dist_w2 = w_start + 2 + padding - kw; + int dist_w3 = w_start + 3 + padding - kw; + + // Pixel 0 + if (dist_w0 % stride == 0) { + int win_w = dist_w0 / stride; + if (win_w >= 0 && win_w < grid_w) { + int l_idx = win_h * grid_w + win_w; + sum0 += input[input_channel_ptr + l_idx]; + } + } + // Pixel 1 + if (dist_w1 % stride == 0) { + int win_w = dist_w1 / stride; + if (win_w >= 0 && win_w < grid_w) { + int l_idx = win_h * grid_w + win_w; + sum1 += input[input_channel_ptr + l_idx]; + } + } + // Pixel 2 + if (dist_w2 % stride == 0) { + int win_w = dist_w2 / stride; + if (win_w >= 0 && win_w < grid_w) { + int l_idx = win_h * grid_w + win_w; + sum2 += input[input_channel_ptr + l_idx]; + } + } + // Pixel 3 + if (dist_w3 % stride == 0) { + int win_w = dist_w3 / stride; + if (win_w >= 0 && win_w < grid_w) { + int l_idx = win_h * grid_w + win_w; + sum3 += input[input_channel_ptr + l_idx]; + } + } + } + } + } + } + + long long out_idx = (long long)b * (channels * out_h * out_w) + c * (out_h * out_w) + h * out_w + w_start; + + output[out_idx + 0] = sum0; + output[out_idx + 1] = sum1; + output[out_idx + 2] = sum2; + output[out_idx + 3] = sum3; + } + + torch::Tensor fold_cuda(torch::Tensor input, int output_h, int output_w, int k_size, int stride, int padding) { + int batch = input.size(0); + int c_total = input.size(1); // C * K * K + int L_in = input.size(2); + + int channels = c_total / (k_size * k_size); + + auto output = torch::empty({batch, channels, output_h, output_w}, input.options()); + + if (output_w % 4 != 0) return output; + + long long total_elements = output.numel(); + int n_vec = total_elements / 4; + + const int block_size = 256; + const int grid_size = (n_vec + block_size - 1) / block_size; + + fold_gather_f4_kernel<<>>( + input.data_ptr(), + output.data_ptr(), + n_vec, + batch, channels, output_h, output_w, + k_size, stride, padding, L_in + ); + + return output; + } + """ + + self.op = load_inline( + name="fold_gather_f4_v1", + cpp_sources=cpp_source, + cuda_sources=cuda_source, + functions=["fold_cuda"], + extra_cuda_cflags=["-O3"], + verbose=False + ) + + def forward(self, x: torch.Tensor) -> torch.Tensor: + if not x.is_contiguous(): x = x.contiguous() + return self.op.fold_cuda(x, self.height, self.width, self.kernel_size, self.stride, self.padding) \ No newline at end of file diff --git a/S1/ZZZJ_#196/fold_torch.py b/S1/ZZZJ_#196/fold_torch.py new file mode 100644 index 00000000..6dc9c770 --- /dev/null +++ b/S1/ZZZJ_#196/fold_torch.py @@ -0,0 +1,36 @@ +import torch +import torch.nn as nn + +BATCH = 16 +CHANNELS = 64 +HEIGHT = 64 +WIDTH = 64 +KERNEL_SIZE = 3 +STRIDE = 1 +PADDING = 1 + +class Model(nn.Module): + def __init__(self): + super().__init__() + + self.fold = nn.Fold( + output_size=(HEIGHT, WIDTH), + kernel_size=KERNEL_SIZE, + dilation=1, + padding=PADDING, + stride=STRIDE + ) + + def forward(self, x: torch.Tensor) -> torch.Tensor: + return self.fold(x) + +def get_inputs(): + + L = HEIGHT * WIDTH + C_in = CHANNELS * KERNEL_SIZE * KERNEL_SIZE + + x = torch.randint(low=-2, high=3, size=(BATCH, C_in, L), device='cuda').float() + return [x] + +def get_init_inputs(): + return [] \ No newline at end of file diff --git a/S1/ZZZJ_#196/prompt.txt b/S1/ZZZJ_#196/prompt.txt new file mode 100644 index 00000000..3dbde520 --- /dev/null +++ b/S1/ZZZJ_#196/prompt.txt @@ -0,0 +1,44 @@ +You write custom CUDA kernels to replace the pytorch operators in the given architecture to get speedups. + +You have complete freedom to choose the set of operators you want to replace. You may make the decision to replace some operators with custom CUDA kernels and leave others unchanged. You may replace multiple operators with custom implementations, consider operator fusion opportunities (combining multiple operators into a single kernel, for example, combining matmul+relu), or algorithmic changes (such as online softmax). You are only limited by your imagination. + +Here's an example to show you the syntax of inline embedding custom CUDA operators in torch: The example given architecture is: + +python +import torch +import torch.nn as nn + +BATCH = 16 +CHANNELS = 64 +HEIGHT = 64 +WIDTH = 64 +KERNEL_SIZE = 3 +STRIDE = 1 +PADDING = 1 + +class Model(nn.Module): + def __init__(self): + super().__init__() + + self.fold = nn.Fold( + output_size=(HEIGHT, WIDTH), + kernel_size=KERNEL_SIZE, + dilation=1, + padding=PADDING, + stride=STRIDE + ) + + def forward(self, x: torch.Tensor) -> torch.Tensor: + return self.fold(x) + +def get_inputs(): + + L = HEIGHT * WIDTH + C_in = CHANNELS * KERNEL_SIZE * KERNEL_SIZE + + x = torch.randint(low=-2, high=3, size=(BATCH, C_in, L), device='cuda').float() + return [x] + +def get_init_inputs(): + return [] +``` \ No newline at end of file diff --git a/S1/ZZZJ_#196/run_code.py b/S1/ZZZJ_#196/run_code.py new file mode 100644 index 00000000..100e7fe9 --- /dev/null +++ b/S1/ZZZJ_#196/run_code.py @@ -0,0 +1,74 @@ +########################################################### +# 性能和精度验证程序 +########################################################### +import torch +import torch.nn as nn +import time +from fold_torch import Model,get_inputs,get_init_inputs +from fold_cuda import ModelNew + +def run_benchmark(): + # 检查 CUDA 是否可用 + if not torch.cuda.is_available(): + print("CUDA 不可用，请确保您有可用的 NVIDIA GPU 并已正确安装 PyTorch CUDA 版本。") + return + else: + device = torch.device("cuda") + + # 初始化模型 + init_inputs = get_init_inputs() + init_inputs = [ + x.cuda(device=device) if isinstance(x, torch.Tensor) else x for x in init_inputs + ] + inputs = get_inputs() + inputs = [ + x.cuda(device=device) if isinstance(x, torch.Tensor) else x for x in inputs + ] + + torch_model = Model(*init_inputs).cuda() + cuda_model = ModelNew(*init_inputs).cuda() + + torch_model.eval() + cuda_model.eval() + + print("-------------------- 精度对齐验证 --------------------") + with torch.no_grad(): + output_torch = torch_model( *inputs) + output_cuda = cuda_model(*inputs) + + precision_flag = torch.allclose(output_torch, output_cuda,rtol=1e-03) + if precision_flag: + print("✅ 精度对齐：两个模型的输出结果非常接近。") + else: + print("❌ 精度不一致！") + + print("\n-------------------- 性能加速比测试 --------------------") + num_iterations = 100 + + # PyTorch 模型计时 + torch.cuda.synchronize() + start_time = time.time() + for _ in range(num_iterations): + _ = torch_model(*inputs) + torch.cuda.synchronize() + torch_time = (time.time() - start_time) / num_iterations + + # 自定义 CUDA 内核计时 + torch.cuda.synchronize() + start_time = time.time() + for _ in range(num_iterations): + _ = cuda_model(*inputs) + torch.cuda.synchronize() + cuda_time = (time.time() - start_time) / num_iterations + + print(f"PyTorch torch.relu 平均执行时间: {torch_time:.6f} 秒") + print(f"自定义 CUDA 内核 平均执行时间: {cuda_time:.6f} 秒") + speedup = 0 + if cuda_time > 0: + speedup = torch_time / cuda_time + print(f"加速比 (Speedup): {speedup:.2f}x") + else: + print("CUDA 内核执行时间为0，无法计算加速比。") + return precision_flag,speedup +if __name__ == "__main__": + precision_flag,speedup = run_benchmark() \ No newline at end of file