6.1.2.3 Framelock
Framelock (sometimes called “frame synchronization”) refers to combining output
locking with synchronized buffer swaps for 3D applications running across multiple
windows. This type of synchronization can be used to coordinate the display of frames
for applications on a single computer or across multiple computers. In framelocked
systems with multiple computers, one (the timing server) is responsible for generating
a synchronization signal for the others (the timing clients).
When graphics and video are displayed across multiple monitors on multiple
computers, framelocked systems help maintain image refresh in sync. This allows
images displayed on multiple monitors to create a large virtual canvas. For example,
recent 4K resolution projection output devices require four DVI inputs to create one
large 4K image.
Framelock is especially critical for stereo viewing, where the left and right fields must
be in sync across all displays.
Framelock is most commonly used in simulation industries for displaying images to
ensure seamless transition of objects from one window to another.
The following series of diagrams shows a variety of possible framelocking
configurations.
The following image shows a single PC with four GPUs connected to an AMD FirePro™
W7000 synchronization module framelocked with an internal reference clock signal.
Figure 6–3 Single PC with Four GPUs Framelocked
The following is an advanced framelock setup using two PCs with four GPUs each
connected to an AMD FirePro™ W7000 synchronization module synchronized with an
internal timing server running on one of the PCs.
Reference 23
© 2012 Advanced Micro Devices Inc. AMD FirePro™ W7000 Graphics Accelerator
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