NVIDIA NVTX (NVIDIA Tools Extension Library)

NVIDIA Tools Extension (NVTX) is a C-based API for annotating events, code ranges, and resources within applications, allowing developers to visualize and analyze performance using NVIDIA profiling tools like Nsight Systems. While `nvidia-nvtx` (version 13.2.20) provides the core C API, Python users typically interact with NVTX through the separate `nvtx` Python package (current version 0.2.15), which offers native Python wrappers for a subset of the C API. It enables profiling Python code, including CPU and GPU activities, and visualizing these on a timeline.