FGFS-4.1/OpenSceneGraph
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Added new Viewer threading model options

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This commit is contained in:
Robert Osfield
2007-02-06 14:38:08 +00:00
parent eeaad74021
commit 3de205ec45
4 changed files with 118 additions and 42 deletions
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102
src/osgViewer/Viewer.cpp
View File

@@ -541,9 +541,10 @@ Viewer::Viewer():
_done(false),
_keyEventSetsDone(osgGA::GUIEventAdapter::KEY_Escape),
_quitEventSetsDone(true),
_threadingModel(SingleThreaded),
// _threadingModel(ThreadPerContext),
// _threadingModel(ThreadPerCamera),
// _threadingModel(SingleThreaded),
// _threadingModel(CullDrawThreadPerContext),
// _threadingModel(CullThreadPerCameraDrawThreadPerContext),
_threadingModel(AutomaticSelection),
_threadsRunning(false),
_useMainThreadForRenderingTraversal(true),
_endBarrierPosition(AfterSwapBuffers),
@@ -570,7 +571,7 @@ Viewer::~Viewer()
Threads threads;
getAllThreads(threads);
osg::notify(osg::NOTICE)<<"start destrcutor getThreads = "<<threads.size()<<std::endl;
osg::notify(osg::INFO)<<"Viewer::~Viewer():: start destructor getThreads = "<<threads.size()<<std::endl;
stopThreading();
@@ -601,7 +602,7 @@ Viewer::~Viewer()
getAllThreads(threads);
osg::notify(osg::NOTICE)<<"end destrcutor getThreads = "<<threads.size()<<std::endl;
osg::notify(osg::INFO)<<"Viewer::~Viewer() end destrcutor getThreads = "<<threads.size()<<std::endl;
}
@@ -734,7 +735,7 @@ void Viewer::stopThreading()
{
if (!_threadsRunning) return;
osg::notify(osg::NOTICE)<<"Viewer::stopThreading() - stopping threading"<<std::endl;
osg::notify(osg::INFO)<<"Viewer::stopThreading() - stopping threading"<<std::endl;
Contexts contexts;
getContexts(contexts);
@@ -811,7 +812,7 @@ void Viewer::stopThreading()
_endRenderingDispatchBarrier = 0;
_numThreadsOnBarrier = 0;
_endDynamicDrawBlock = 0;
osg::notify(osg::NOTICE)<<"Viewer::stopThreading() - stopped threading :-)"<<std::endl;
osg::notify(osg::INFO)<<"Viewer::stopThreading() - stopped threading."<<std::endl;
}
// Compile operation, that compile OpenGL objects.
@@ -863,28 +864,70 @@ struct ViewerRunOperations : public osg::Operation
}
};
Viewer::ThreadingModel Viewer::suggestBestThreadingModel()
{
Contexts contexts;
getContexts(contexts);
if (contexts.empty()) return SingleThreaded;
Cameras cameras;
getCameras(cameras);
if (cameras.empty()) return SingleThreaded;
int numProcessors = OpenThreads::GetNumberOfProcessors();
if (contexts.size()==1)
{
if (numProcessors==1) return SingleThreaded;
else return DrawThreadPerContext;
}
if (numProcessors >= static_cast<int>(cameras.size()+contexts.size()))
{
return CullThreadPerCameraDrawThreadPerContext;
}
#if 1
return DrawThreadPerContext;
#else
return CullDrawThreadPerContext;
#endif
}
unsigned int Viewer::computeNumberOfThreadsIncludingMainRequired()
{
unsigned int numThreadsOnBarrier = 1;
switch(_threadingModel)
ThreadingModel threadingModel = _threadingModel==AutomaticSelection ? suggestBestThreadingModel() : _threadingModel;
switch(threadingModel)
{
case(SingleThreaded):
numThreadsOnBarrier = 1;
break;
case(ThreadPerContext):
case(CullDrawThreadPerContext):
{
Contexts contexts;
getContexts(contexts);
numThreadsOnBarrier = contexts.size()+1;
break;
}
case(ThreadPerCamera):
}
case(DrawThreadPerContext):
numThreadsOnBarrier = 1;
break;
case(CullThreadPerCameraDrawThreadPerContext):
{
Cameras cameras;
getCameras(cameras);
numThreadsOnBarrier = _useMainThreadForRenderingTraversal ? cameras.size() : cameras.size()+1;
break;
}
default:
osg::notify(osg::NOTICE)<<"Error: Threading model not selected"<<std::endl;
}
return numThreadsOnBarrier;
}
@@ -898,6 +941,8 @@ void Viewer::startThreading()
// release any context held by the main thread.
releaseContext();
_threadingModel = _threadingModel==AutomaticSelection ? suggestBestThreadingModel() : _threadingModel;
Contexts contexts;
getContexts(contexts);
@@ -910,12 +955,18 @@ void Viewer::startThreading()
case(SingleThreaded):
_numThreadsOnBarrier = 1;
return;
case(ThreadPerContext):
case(CullDrawThreadPerContext):
_numThreadsOnBarrier = contexts.size()+1;
break;
case(ThreadPerCamera):
case(DrawThreadPerContext):
_numThreadsOnBarrier = 1;
break;
case(CullThreadPerCameraDrawThreadPerContext):
_numThreadsOnBarrier = _useMainThreadForRenderingTraversal ? cameras.size() : cameras.size()+1;
break;
default:
osg::notify(osg::NOTICE)<<"Error: Threading model not selected"<<std::endl;
return;
}
// using multi-threading so make sure that new objects are allocated with thread safe ref/unref
@@ -932,7 +983,7 @@ void Viewer::startThreading()
getSceneData()->resizeGLObjectBuffers(osg::DisplaySettings::instance()->getMaxNumberOfGraphicsContexts());
}
osg::notify(osg::NOTICE)<<"_numThreadsOnBarrier = "<<_numThreadsOnBarrier<<std::endl;
osg::notify(osg::INFO)<<"_numThreadsOnBarrier = "<<_numThreadsOnBarrier<<std::endl;
int numProcessors = OpenThreads::GetNumberOfProcessors();
@@ -942,6 +993,8 @@ void Viewer::startThreading()
unsigned int numViewerDoubleBufferedRenderingOperation = 0;
bool graphicsThreadsDoesCull = _threadingModel == CullDrawThreadPerContext;
// reset any double buffer graphics objects
for(citr = contexts.begin();
citr != contexts.end();
@@ -958,7 +1011,7 @@ void Viewer::startThreading()
ViewerDoubleBufferedRenderingOperation* vdbro = dynamic_cast<ViewerDoubleBufferedRenderingOperation*>(oitr->get());
if (vdbro)
{
vdbro->setGraphicsThreadDoesCull( _threadingModel != ThreadPerCamera );
vdbro->setGraphicsThreadDoesCull( graphicsThreadsDoesCull );
vdbro->_done = false;
++numViewerDoubleBufferedRenderingOperation;
}
@@ -966,13 +1019,14 @@ void Viewer::startThreading()
}
if (_threadingModel==ThreadPerContext)
if (_threadingModel==CullDrawThreadPerContext)
{
_startRenderingBarrier = 0;
_endRenderingDispatchBarrier = 0;
_endDynamicDrawBlock = 0;
}
else if (_threadingModel==ThreadPerCamera)
else if (_threadingModel==DrawThreadPerContext ||
_threadingModel==CullThreadPerCameraDrawThreadPerContext)
{
_startRenderingBarrier = 0;
_endRenderingDispatchBarrier = 0;
@@ -1011,12 +1065,12 @@ void Viewer::startThreading()
gc->getGraphicsThread()->add(new ViewerCompileOperation(getSceneData()));
// add the startRenderingBarrier
if (_threadingModel==ThreadPerContext && _startRenderingBarrier.valid()) gc->getGraphicsThread()->add(_startRenderingBarrier.get());
if (_threadingModel==CullDrawThreadPerContext && _startRenderingBarrier.valid()) gc->getGraphicsThread()->add(_startRenderingBarrier.get());
// add the rendering operation itself.
gc->getGraphicsThread()->add(new ViewerRunOperations());
if (_threadingModel==ThreadPerContext && _endBarrierPosition==BeforeSwapBuffers && _endRenderingDispatchBarrier.valid())
if (_threadingModel==CullDrawThreadPerContext && _endBarrierPosition==BeforeSwapBuffers && _endRenderingDispatchBarrier.valid())
{
// add the endRenderingDispatchBarrier
gc->getGraphicsThread()->add(_endRenderingDispatchBarrier.get());
@@ -1027,7 +1081,7 @@ void Viewer::startThreading()
// add the swap buffers
gc->getGraphicsThread()->add(swapOp.get());
if (_threadingModel==ThreadPerContext && _endBarrierPosition==AfterSwapBuffers && _endRenderingDispatchBarrier.valid())
if (_threadingModel==CullDrawThreadPerContext && _endBarrierPosition==AfterSwapBuffers && _endRenderingDispatchBarrier.valid())
{
// add the endRenderingDispatchBarrier
gc->getGraphicsThread()->add(_endRenderingDispatchBarrier.get());
@@ -1038,7 +1092,7 @@ void Viewer::startThreading()
}
if (_threadingModel==ThreadPerCamera && _numThreadsOnBarrier>1)
if (_threadingModel==CullThreadPerCameraDrawThreadPerContext && _numThreadsOnBarrier>1)
{
Cameras::iterator camItr = cameras.begin();
if (_useMainThreadForRenderingTraversal) ++camItr;
@@ -1050,7 +1104,7 @@ void Viewer::startThreading()
osg::Camera* camera = *camItr;
camera->createCameraThread();
#if 0
#if 1
if (affinity) camera->getCameraThread()->setProcessorAffinity(processNum % numProcessors);
#else
if (affinity) camera->getCameraThread()->setProcessorAffinity(1);
@@ -1263,13 +1317,13 @@ void Viewer::setUpRenderingSupport()
osg::DisplaySettings* ds = _displaySettings.valid() ? _displaySettings.get() : osg::DisplaySettings::instance();
osgDB::DatabasePager* dp = _scene.valid() ? _scene->getDatabasePager() : 0;
bool graphicsThreadDoesCull = _threadingModel!=ThreadPerCamera;
bool graphicsThreadDoesCull = _threadingModel!=CullThreadPerCameraDrawThreadPerContext;
unsigned int numViewerDoubleBufferedRenderingOperation = 0;
Cameras localCameras;
getCameras(localCameras);
if (true)//(_threadingModel==ThreadPerCamera)
if (true)//(_threadingModel==CullThreadPerCameraDrawThreadPerContext)
{
for(Contexts::iterator gcitr = contexts.begin();
gcitr != contexts.end();