HP Remote Graphics Software 5.4.8 User Guide

Performance tuning for Windows
This section provides performance tuning tips for RGS on Windows.
1. Lock desktop icons on the Remote Computer by performing the following steps:
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Select the Control Panel
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Bring up the Display Properties window
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Select the Desktop tab and select Customize Desktop.
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On the Web tab, check Lock desktop items.
2. Sender process priority—Occasionally, an activity such as rotating a model in a 3D design
program may appear slow and erratic, and image update may appear inconsistent. If the Sender
is running on Windows, OS scheduling may be an issue. This can often be resolved by increasing
the process priority of the Sender. See the
Setting the Windows Sender process priority
on page 64 for further details.
3. Java Applications—Some versions of the Java Runtime Environment use DirectX. To see screen
updates on Windows XP Professional with these versions of Java, Automatic 3D Updates must be
enabled (see
Using the rgadmin tool on page 81). Rendering through DirectX will often cause the
entire DirectX window to be registered as a screen modification. This can result in higher
bandwidth and slightly higher CPU utilization by the Remote Graphics Sender. In some cases,
performance may be improved by using GDI rather than DirectX with Java.
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To use GDI with Java, the "-Dsun.java2d.noddraw=true" option needs to be supplied to the
java or javaw executable. For example:
java -Dsun.java2d.noddraw=true SomeApp
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This can be done by passing this option on the command line or adding this option to the
_JAVA_OPTIONS environment variable. For example:
set _JAVA_OPTIONS=-Dsun.java2d.noddraw=true
java SomeApp
Troubleshooting graphics performance
Graphics adapter frame buffer read performance
The dominant factor impacting performance on the Sender is the frame buffer read performance of the
graphics adapter. Frame buffer read performance of at least ten frames per second is recommended for
optimum RGS performance.
RGS uses the Remote Computer graphics adapter to accelerate rendering of the image. After the image
on the Remote Computer is modified, the RGS Sender reads the rendered image from the frame buffer,
compresses it, and transmits it to the Receiver.
228 Chapter 11 Optimizing RGS performance