forked from ccf-ai-infra/GPUCodeForces
81 lines
2.5 KiB
Python
81 lines
2.5 KiB
Python
import torch
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import time
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from softmarginloss_torch import Model, get_inputs, get_init_inputs
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from softmarginloss_cuda import ModelNew
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def run_benchmark():
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if not torch.cuda.is_available():
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print("CUDA 不可用")
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return
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device = torch.device("cuda")
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# 准备输入数据
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inputs = [x.cuda(device=device) for x in get_inputs()]
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init_inputs = [x.cuda(device=device) if isinstance(x, torch.Tensor) else x for x in get_init_inputs()]
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# 初始化模型
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torch_model = Model(*init_inputs).cuda()
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cuda_model = ModelNew(*init_inputs).cuda()
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torch_model.eval()
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cuda_model.eval()
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print("-------------------- 精度对齐验证 --------------------")
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with torch.no_grad():
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# 预热GPU
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_ = torch_model(*inputs)
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_ = cuda_model(*inputs)
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# 正式测试
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output_torch = torch_model(*inputs)
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output_cuda = cuda_model(*inputs)
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# 更严格的精度检查
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abs_diff = (output_torch - output_cuda).abs()
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max_diff = abs_diff.max().item()
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mean_diff = abs_diff.mean().item()
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print(f"最大差异: {max_diff:.6f}")
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print(f"平均差异: {mean_diff:.6f}")
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precision_flag = torch.allclose(output_torch, output_cuda, rtol=1e-05, atol=1e-05)
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if precision_flag:
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print("✅ 精度对齐：两个模型的输出结果非常接近。")
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else:
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print("❌ 精度不一致！")
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print("\n-------------------- 性能加速比测试 --------------------")
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num_iterations = 100
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# 预热GPU
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for _ in range(10):
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_ = torch_model(*inputs)
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_ = cuda_model(*inputs)
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# PyTorch模型计时
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torch.cuda.synchronize()
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start_time = time.time()
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for _ in range(num_iterations):
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_ = torch_model(*inputs)
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torch.cuda.synchronize()
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torch_time = (time.time() - start_time) / num_iterations
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# 自定义CUDA内核计时
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torch.cuda.synchronize()
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start_time = time.time()
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for _ in range(num_iterations):
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_ = cuda_model(*inputs)
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torch.cuda.synchronize()
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cuda_time = (time.time() - start_time) / num_iterations
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print(f"PyTorch内置SoftMarginLoss平均执行时间: {torch_time:.6f}秒")
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print(f"自定义CUDA SoftMarginLoss平均执行时间: {cuda_time:.6f}秒")
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speedup = torch_time / cuda_time if cuda_time > 0 else 0
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print(f"加速比 (Speedup): {speedup:.2f}x")
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return precision_flag, speedup
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if __name__ == "__main__":
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precision_flag, speedup = run_benchmark() |