Using the Pause/Play Keyboard Shortcut
When running Intel® GPA System Analyzer HUD, you can use the Play/Pause keyboard shortcut, which is Ctrl+Shift+P by default, to pause and resume your graphics application. However, when in the paused state only the following keyboard shortcuts will have any visual impact:
the default Next Frame keyboard shortcut Ctrl+Shift+N to “single-step” a frame at a time through your game
the default Play/Pause keyboard shortcut Ctrl+Shift+P to resume the game
While capturing a frame or trace file (by default Ctrl+Shift+C and Ctrl+Shift+T respectively), you will see no visual indication that the capture was successfully completed until you use Play/Pause again to resume the game.
In fact, capturing a frame file while paused will cause Intel GPA System Analyzer HUD to disappear until you use either the Play/Pause or Next Frame keyboard shortcut.
For more information, refer to the knowledge-base article posted on the Intel® GPA Home Page.
Resuming Operation Works with a Long Delay
On some systems, “resume” attempts may take about five seconds. This issue occurs only if the analyzing application uses a keyboard hook procedure of the type WH_KEYBOARD_LL, and the registry key LowLevelHooksTimeout is set to a larger value than the default (300 ms). If you regularly use Pause/Resume and resuming takes longer than you are comfortable with, use a registry editor such as RegEdit to modify the value of this registry key back to the default value of 300 ms.