NVIDIA DALI (Data Loading Library) is the most effective tool for efficiently sharing datasets across TensorFlow, PyTorch, and XGBoost in a recommendation engine, ensuring compatibility and high performance on NVIDIA GPUs. DALI accelerates data preprocessing and loading with GPU-accelerated pipelines, supporting multiple frameworks and minimizing CPU bottlenecks. This is crucial for continuous training on user interaction data. Option A (cuDNN) optimizes neural network primitives, not data sharing.
Option B (TensorRT) focuses on inference optimization. Option D (Nsight Compute) is for profiling, not data handling. NVIDIA's DALI documentation highlights its cross-framework data pipeline capabilities.