seniorPyTorch
What is memory pinning and how does it interact with non_blocking GPU transfers?
Updated May 17, 2026
Short answer
Pinned memory enables faster asynchronous CPU-to-GPU transfers using DMA.
Deep explanation
Pinned (page-locked) memory prevents OS from moving data, allowing GPU DMA engines to copy data directly. When combined with non_blocking=True, transfers can overlap with compute, improving throughput in pipelines.
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