• 3Dfx Glide performance testing implementation

• The application "hangs" when I run it with Intel® Performance Evaluation and Analysis Kit (IPEAK) Graphics Performance Tool (GPT)

• Some applications "hang" when I run them with GPT

• GPT does not log any data
  

3Dfx Glide performance testing implementation
There are no current plans to support 3Dfx Glide. 3Dfx will work with OpenGL support.

The application "hangs" when I run it with IPEAK Graphics Performance Tool (GPT)

1. First, make sure the application can run.
2. Re-boot after installing the application, and then run the application to make sure it executes flawlessly.
3. The first time you run GPT with an application, select "Frame Rate" only. This is the minimum amount of instrumentation that GPT will modify the application with.
4. Also, when doing Passive Analysis, there is a tremendous amount of data logged out. This may add a minute or more to most application startups.

Some applications "hang" when I run them with GPT
The usual reason is that the application performs some invalid system action causing itself to hang. Overwriting memory is the most typical cause. Applications can overwrite memory as long as they don’t overwrite their own memory structures. This is why some applications work, but not others. They may overwrite their own memory, and sometimes memory is arranged in such a way that it is not overwritten. If the application overwrites GPT’s memory, this will usually cause it to hang. GPT also acts like a debugger and may catch these memory overwrites if they cause an exception and exit the application.

GPT does not log any data
Some applications use shell programs - either executables (.EXE) or batch (.BAT) files - to call the real application. In other words, the main 3D application is called by another application, for example LucasArts’ Shadows of the Empire* (SHADOWS.EXE) is typically called from the shell program SOTE.EXE. SHADOWS.EXE is the real program that should be analyzed, not SOTE.EXE.