Howto:Activate multi core and multi GPU support: Difference between revisions
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m (starting to document what's currently undocumented: http://flightgear.org/forums/viewtopic.php?f=24&t=7716&st=0#p75889) |
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FlightGear supports a number of different threading models to make use of multiple CPUs or GPUs, this applies mostly to highend multi-core or multi-GPU, multi-screen (or multi-window) setups and may improve performance. | |||
There is a property supported named /sim/rendering/multithreading-mode this can be set either in preferences.xml or by using the --prop:/sim/rendering/multithreading-mode= parameter from the console (or fgrun) this affects directly the osgviewer threading mode, supported values are: | There is a property supported named /sim/rendering/multithreading-mode this can be set either in preferences.xml or by using the --prop:/sim/rendering/multithreading-mode= parameter from the console (or fgrun) this affects directly the osgviewer threading mode, supported values are: | ||
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</sim> | </sim> | ||
</PropertyList> | </PropertyList> | ||
This property must be set during initialization, modifying it at runtime has no effect. | |||
* http://flightgear.org/forums/viewtopic.php?f=11&t=7182&p=69706 | * http://flightgear.org/forums/viewtopic.php?f=11&t=7182&p=69706 | ||
Revision as of 12:00, 29 July 2010
FlightGear supports a number of different threading models to make use of multiple CPUs or GPUs, this applies mostly to highend multi-core or multi-GPU, multi-screen (or multi-window) setups and may improve performance.
There is a property supported named /sim/rendering/multithreading-mode this can be set either in preferences.xml or by using the --prop:/sim/rendering/multithreading-mode= parameter from the console (or fgrun) this affects directly the osgviewer threading mode, supported values are:
* AutomaticSelection * CullDrawThreadPerContext * DrawThreadPerContext * CullThreadPerCameraDrawThreadPerContext
To set this in a separate XML file, just include it from preferences.xml (toplevel PropertyList node):
threadingmode.xml:
<?xml version="1.0"?>
<PropertyList>
<sim>
<rendering>
<multithreading-mode>AutomaticSelection</multithreading-mode>
</rendering>
</sim>
</PropertyList>
This property must be set during initialization, modifying it at runtime has no effect.