GPU Data Pipeline — Feeding GPUs Efficiently

Why it matters

Data pipeline often GPU bottleneck. Understanding shapes efficiency.

The architecture

DataLoader with num_workers.

Prefetch queue.

Pin memory for fast transfer.

How it works end to end

Bottleneck check: GPU utilization < 90% often means data-bound.

DALI: GPU-accelerated data loading.

WebDataset: streaming from tar.

Cache: on-node NVMe.