NVIDIA PerfKit is used to help debug and profile OpenGL and Direct3D application
BS Editor: NVIDIA PerfKit 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.

The performance counters are available directly in your OpenGL and DirectX applications and in tools such as Intel VTun for Windows and Graphic Remedy鈥檚 gDEBugger via the Windows Management Instrumentation (WMI) Performance Data Helper (PDH) interface. A plug-in supporting Microsoft PIX for Windows is also provided, giving you low-latency access to PerfKit performance counters directly from the driver.

NVIDIA PerfKit consists of the following components:

-PerfHUD
*New in 6.5! Save/Load DX10 Frame captures (Ctrl+S in the Frame Debugger)
*Use standard drivers on Windows Vista
*GeForce GTX 200 Series GPU Support
*A more robust input layer for intercepting the mouse and keyboard
*Supports GeForce 8 and 9 GPUs
*SLI Support
*Texture Visualization and Overrides
*API Call List
*Dependency View
*New CPU/GPU Timing graph
*Complete feature list
-PerfSDK
*GeForce 8 and 9 Series Support
*API for accessing GPU signals in your applications
*Sample code and helper classes for OpenGL(tm) and DirectX(tm) applications
*NVIDIA Developer Control Panel
-NVIDIA Plug-in for Microsoft PIX for Windows
-GLExpert
*Debug OpenGL usage errors and performance issues
-Support for PerfMon, Intel(r) VTune(tm), gDEBugger, and other analysis tools via the Windows
-Management Instrumentation (WMI) Performance Data Helper (PDH) interface.
-gDEBugger 30-day trial version
Note:Download link 1 is for Windows XP (32-bit) and Download link 2 is for Windows Vista (32-bit) . you can free download NVIDIA PerfKit 6.5 now.