Unverified50% confidenceSolutionExact time
启用 pin_memory 后 PyTorch 在固定内存上分配 tensor，CUDA 驱动可通过 PCIe 总线执行异步 DMA 传输，提升 CPU 到 GPU 传输带宽利用率，在 GPU 训练场景下几乎应默认开启
1
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50%
Confidence
Long-term
Relevance
7/16/2026
First Seen
Sources
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