FGFS-4.1/OpenSceneGraph
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Added preliminary support for process affinity support under Linux.

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This commit is contained in:
Robert Osfield 2006-08-06 16:49:48 +00:00
parent ebfffd4e58
commit 687bfb40c1
1 changed files with 58 additions and 3 deletions
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57
src/osgProducer/OsgCameraGroup.cpp
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@ -29,9 +29,15 @@
#define WGL_SAMPLES_ARB 0x2042
#endif
#if defined (__linux__)
#include <sched.h>
#endif
using namespace Producer;
using namespace osgProducer;
static osg::ApplicationUsageProxy OsgCameraGroup_e0(osg::ApplicationUsage::ENVIRONMENTAL_VARIABLE, "OSG_PROCESSOR_AFFINTIY <mode>", "ON | OFF - Where supported, switch on or off the processor affinity." );
OsgCameraGroup::RealizeCallback::~RealizeCallback()
{
}
@ -42,11 +48,56 @@ public:
RenderSurfaceRealizeCallback(OsgCameraGroup* cameraGroup,OsgSceneHandler* sceneHandler):
_cameraGroup(cameraGroup),
_sceneHandler(sceneHandler) {}
_sceneHandler(sceneHandler),
_numberOfProcessors(1),
_sceneHandlerNumber(0),
_enableProccessAffinityHint(false)
{
const char* str = getenv("OSG_PROCESSOR_AFFINTIY");
if (str && (strcmp(str,"ON")==0 || strcmp(str,"On")==0 || strcmp(str,"on")==0))
{
_enableProccessAffinityHint = true;
}
else
{
_enableProccessAffinityHint = false;
}
#if defined (__linux__)
/* Determine the actual number of processors */
_numberOfProcessors = sysconf(_SC_NPROCESSORS_CONF);
#endif
const OsgCameraGroup::SceneHandlerList& shl = _cameraGroup->getSceneHandlerList();
for(unsigned int i=0; i<shl.size(); ++i)
{
if (shl[i]==sceneHandler) _sceneHandlerNumber = i;
}
}
virtual void operator()( const Producer::RenderSurface & rs)
{
#if defined (__linux__)
if (_enableProccessAffinityHint && _numberOfProcessors>1)
{
cpu_set_t cpumask;
CPU_ZERO( &cpumask );
CPU_SET( _sceneHandlerNumber % _numberOfProcessors, &cpumask );
if( sched_setaffinity( 0, sizeof(cpumask), &cpumask ) == -1 )
{
osg::notify(osg::NOTICE)<<"WARNING: Could not set CPU Affinity for scene handler "<<_sceneHandlerNumber<<std::endl;
}
else
{
osg::notify(osg::NOTICE)<<"Set CPU Affinity for scene handler "<<_sceneHandlerNumber<<std::endl;
}
}
#endif
osg::Timer timer;
osg::Timer_t start_t = timer.tick();
@ -65,6 +116,10 @@ public:
OsgCameraGroup* _cameraGroup;
OsgSceneHandler* _sceneHandler;
int _numberOfProcessors;
int _sceneHandlerNumber;
bool _enableProccessAffinityHint;
};