[ Thanks to An Anonymous Reader for
this link. ]
“NVPerfKit is a comprehensive suite of performance tools to help
debug and profile OpenGL and Direct3D applications. It gives you
access to low-level performance counters inside the driver and
hardware counters inside the GPU itself. The counters can be used
to determine exactly how your application is using the GPU,
identify performance issues, and confirm that performance problems
have been resolved.“NVPerfKit 2.1 now includes support for 64-bit Windows
platforms, as well as 32-bit and 64-bit Linux platforms…”