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TAU Performance System vs NVIDIA Nsight Systems: catalog facts
TAU Performance System	NVIDIA Nsight Systems
Free Available to download from the University of Oregon research site.	Free Available as a free download from NVIDIA.
macOS	macOS
Supports many languages used in scientific computing Several instrumentation methods, from automatic to manual	Unified timeline of CPU, GPU, OS and network activity Traces CUDA libraries
Aimed at HPC specialists with a steep learning curve Academic website with dated presentation	Focused on NVIDIA hardware Steep learning curve for non-specialists
Downloadable app	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.