Howto:Activate multi core and multi GPU support: Difference between revisions
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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. | 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 the preferences.xml file located in the flightgear data folder 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 the preferences.xml file located in the flightgear data folder (base package: [[$FG_ROOT]]) 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 | * AutomaticSelection | ||
Revision as of 15:32, 21 October 2011
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 the preferences.xml file located in the flightgear data folder (base package: $FG_ROOT) 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
Further information on threading modes can be found here: http://www.mail-archive.com/osg-users@openscenegraph.net/msg09620.html and here: http://www.mail-archive.com/osg-users@openscenegraph.net/msg09611.html
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.