FIX: Performance issues when you run a Silverlight for Windows Embedded application in Windows Embedded Compact 2013

Restart requirement

After you apply this update, you must perform a clean build of the whole platform. To do this, use one of the following methods:

• On the Build menu, click Clean Solution, and then click Build Solution.
• On the Build menu, click Rebuild Solution.

You do not have to restart the computer after you apply this software update.

Update replacement information

This update does not replace any other updates.

Workaround information

Instantiating a new XAML class that inherits the ICustomGraphicsDevice class may trigger the following compiler error:


This issue is caused by the addition of four abstract functions in the ICustomGraphicsDevice class for this hotfix.

To work around this issue, implement the following abstract functions in your class that inherits ICustomGraphicsDevice. (See also xamlruntimegraphics.h.)

• virtual __checkReturn XRESULT UIThreadPriority() = 0;
• virtual __checkReturn XRESULT RenderThreadPriority() = 0;
• virtual __checkReturn XRESULT RenderThreadQuantum() = 0;
• virtual __checkReturn BOOL DisplayFrameRateMonitor() = 0;

This update introduces several registry values that let you do the following:

• Manipulate the UI Thread Priority
• Manipulate the Render Thread Priority
• Manipulate the Render Thread Quantum
• Display the frame rate monitor together with the two previously mentioned thread priority settings
  
  

Registry information

Registry location

Registry subkeys and possible values

To elevate the rate of the rendering thread for better performance, set the RenderThreadPriority value to 2.