NVIDIA Nsight Systems

NVIDIA Nsight Systems is a performance debugging tool for CUDA C++ programs. It combines profiling, tracing, and expert systems analysis in a GUI.

No one wakes up and says "today I want to write a program that runs on a hard to use, expensive piece of hardware using a proprietary software stack". Instead, GPUs are selected when normal computing hardware doesn't perform well enough to solve a computing problem. So almost all GPU programs are performance-sensitive, and the performance debugging workflows supported by Nsight Systems or other tools built on top of the CUDA Profiling Tools Interface are mission-critical.

You can find its documentation here , but watching someone use the tool is usually more helpful. For details on how to profile GPU applications on Modal, see our documentation .