Re: [osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
Hi, ... Problem solved! It is about some qt q_timer not-blocking signal issue,it is indeed nothing wrong with osg or vpb.I dont excatly know why,but I hope it will help others. Thank you all for your assistances in my most difficult time! Cheers, Lv -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=38847#38847 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
Hi Lv, On Fri, Apr 22, 2011 at 1:17 PM, Lv Qing donlvq...@msn.com wrote: ... use osg2.9.12 and vpb 0.9.10 ,it still fails。so desperate~~ There is little that others in the community will be able to help you with. As I said before it's unlikely that the OSG has anything specific to do with the problem, so changing version is unlikely to make any difference, and if changing OSG versions did affect the results it still is likely to be just co-incidence - the problem is most likely elsewhere. I would recommend running 3rd party memory tracking tools as this might provide some light on what is going wrong. I've used valgrind under Linux recently and while the results were sometimes rather cryptic it was very useful in establishing both memory management and threading issues. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
Hi, ... use osg2.9.12 and vpb 0.9.10 ,it still fails。so desperate~~ Thank you! Cheers, Lv -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=38731#38731 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
Hi,
...
linux qt4 osg2.8.4
I have use ViewerQT to integrate an osg application to a qt4 application witch
has other developer's none-osg application.
Then something strange happen,the ViewerQT seems disturb qt4 application's
shared memory ,which cause some memory crash however
not direct to my osg code but other developer's none-osg code.I removed
my osg code entirely,everything is OK,so I pretty sure it is related to my osg
code.
Then I remove every osg code but just loading an vpb generated .osga terrain
model,the shared memory disturbing issure return! Instead I load a commen .osga
model like cow.ive ,it is OK!
Thank you!
Cheers,
Lv
Code:
class CompositeViewerQT : public osgViewer::CompositeViewer, public
AdapterWidget
{
public:
CompositeViewerQT(QWidget * parent = 0, const char * name = 0, const QGLWidget
* shareWidget = 0, WindowFlags f = 0):
AdapterWidget( parent, name, shareWidget, f )
{
setThreadingModel(osgViewer::CompositeViewer::SingleThreaded);
setCameraManipulator(new osgGA::TrackballManipulator);
osg::ref_ptrosg::Node loadedModel= osgDB::readNodeFile(terrain.osga);
//vpb generated .osga model .error
osg::ref_ptrosg::Node loadedModel= osgDB::readNodeFile(cow.ive); //OK
setSceneData(loadedModel.get());
connect(_timer, SIGNAL(timeout()), this, SLOT(updateGL()));
_timer.start(10);
}
virtual void paintGL()
{
frame();
}
protected:
QTimer _timer;
};
--
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http://forum.openscenegraph.org/viewtopic.php?p=38705#38705
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Re: [osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
Just a guess,
are you mixing debug and release builds? (i.e. linking in the debug
build to release libraries)
I've encountered the strangest memory corruptions and crashes (due to
differently sized STL data structures) under windows however.
Since I'm not quite know the stl implementation you use, that is just a
guess.
hth
Sebastian
Hi,
...
linux qt4 osg2.8.4
I have use ViewerQT to integrate an osg application to a qt4 application witch
has other developer's none-osg application.
Then something strange happen,the ViewerQT seems disturb qt4 application's
shared memory ,which cause some memory crash however
not direct to my osg code but other developer's none-osg code.I removed
my osg code entirely,everything is OK,so I pretty sure it is related to my osg
code.
Then I remove every osg code but just loading an vpb generated .osga terrain
model,the shared memory disturbing issure return! Instead I load a commen .osga
model like cow.ive ,it is OK!
Thank you!
Cheers,
Lv
Code:
class CompositeViewerQT : public osgViewer::CompositeViewer, public
AdapterWidget
{
public:
CompositeViewerQT(QWidget * parent = 0, const char * name = 0, const QGLWidget
* shareWidget = 0, WindowFlags f = 0):
AdapterWidget( parent, name, shareWidget, f )
{
setThreadingModel(osgViewer::CompositeViewer::SingleThreaded);
setCameraManipulator(new osgGA::TrackballManipulator);
osg::ref_ptrosg::Node loadedModel= osgDB::readNodeFile(terrain.osga);
//vpb generated .osga model .error
osg::ref_ptrosg::Node loadedModel= osgDB::readNodeFile(cow.ive); //OK
setSceneData(loadedModel.get());
connect(_timer, SIGNAL(timeout()), this, SLOT(updateGL()));
_timer.start(10);
}
virtual void paintGL()
{
frame();
}
protected:
QTimer _timer;
};
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=38705#38705
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Re: [osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
Hi, ... Thank you for reply so soon!I build osg2.8.4 on linux only release no debug. I just notic that since osg2.9.8 there is some improvement of VirtualPlanetBuilder suppot and DatabasePager memory management and QT support.Maybe I should try this? Thank you! Cheers, Lv -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=38710#38710 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
Hi Lv, On Thu, Apr 21, 2011 at 5:53 PM, Lv Qing donlvq...@msn.com wrote: I just notic that since osg2.9.8 there is some improvement of VirtualPlanetBuilder suppot and DatabasePager memory management and QT support.Maybe I should try this? The latest 2.9.12 dev release does have improvements in thread safe of the pager, but you have to really thrash it to see these problems in older versions of the OSG so I'd guess that 2.8.4 is probably fine. There won't be any harm in trying 2.9.12 out though is pretty API compatible. As for your specific problems, the OSG itself doesn't use shared memory at all, and doesn't use any clever memory tricks so should just operate independantly from Qt and what ever it does on the memory front. The exception to this would be if Qt itself is reimplementing malloc/free and new/delete in which case you really have to look at Qt for tracking down what the problem is. My guess is that use of paged databases on the OSG isn't directly the problem, rather it might just be stressing the system more such that eixsting problems in other codes are brought to the fore, so it's as much just a coincedence rather than direct cause and effect. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
A co-worker of mine recently fixed a bunch of similar VPB issues by
following this advice:
http://forum.osgearth.org/Critical-issue-with-paging-and-horizon-td5789174.html
The jist of it is this:
'Try setting your OSG_MAX_PAGEDLOD environment variable to something
higher (default is 300 if I remember correctly). Also, try changing
your loading policy to preemptive since that way the current LOD is
loaded first. '
- Rob
On 4/21/2011 8:50 AM, Lv Qing wrote:
Hi,
...
linux qt4 osg2.8.4
I have use ViewerQT to integrate an osg application to a qt4 application witch
has other developer's none-osg application.
Then something strange happen,the ViewerQT seems disturb qt4 application's
shared memory ,which cause some memory crash however
not direct to my osg code but other developer's none-osg code.I removed
my osg code entirely,everything is OK,so I pretty sure it is related to my osg
code.
Then I remove every osg code but just loading an vpb generated .osga terrain
model,the shared memory disturbing issure return! Instead I load a commen .osga
model like cow.ive ,it is OK!
Thank you!
Cheers,
Lv
Code:
class CompositeViewerQT : public osgViewer::CompositeViewer, public
AdapterWidget
{
public:
CompositeViewerQT(QWidget * parent = 0, const char * name = 0, const QGLWidget
* shareWidget = 0, WindowFlags f = 0):
AdapterWidget( parent, name, shareWidget, f )
{
setThreadingModel(osgViewer::CompositeViewer::SingleThreaded);
setCameraManipulator(new osgGA::TrackballManipulator);
osg::ref_ptrosg::Node loadedModel= osgDB::readNodeFile(terrain.osga);
//vpb generated .osga model .error
osg::ref_ptrosg::Node loadedModel= osgDB::readNodeFile(cow.ive); //OK
setSceneData(loadedModel.get());
connect(_timer, SIGNAL(timeout()), this, SLOT(updateGL()));
_timer.start(10);
}
virtual void paintGL()
{
frame();
}
protected:
QTimer _timer;
};
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=38705#38705
___
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Re: [osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
Hi Rob, On Thu, Apr 21, 2011 at 10:24 PM, Rob Radtke r...@stellarscience.com wrote: A co-worker of mine recently fixed a bunch of similar VPB issues by following this advice: http://forum.osgearth.org/Critical-issue-with-paging-and-horizon-td5789174.html The jist of it is this: 'Try setting your OSG_MAX_PAGEDLOD environment variable to something higher (default is 300 if I remember correctly). Also, try changing your loading policy to preemptive since that way the current LOD is loaded first. ' From the thread it sounds like tiles may well be overly fine grained, and that the cost of recreating tiles is very high. This might be more common with osgEarth databases, but for VPB generated databases my experience is that for default settings things balance out without performance issues. Use of GL texture compression might well be an issue as well - VPB databases use GL compression which is lightweight to download to the GPU. Upping the maximum number of PagedLOD will give you more headroom if you system can handle it, how far you can safely go will depend upon how much data you have in each tile and how much memory you have available, this is of course something that will vary of dataset to dataset and from system to system so isn't something the OSG can pre-empt with perfect defaults for all scenario's. However, I would add, a low PagedLOD results in lower memory usuage, but greater bandwidth and CPU load. In all cases though, it will just me handling OSG and GL specific memory, it shoudln't touch applications other memory usage other than to contend generally for the systems resources. So for Lv I suspect OSG_MAX_PAGEDLOD will be a red-herring and problem is likely to be elsewhere in the app. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [vpb] vpb generated .osga model seems disturb shared memory in qt4
Hi, ... I dig up a littlte more this morning.I replace origina terrain.osga(about 2G) with a small terrain.osga(10mb) ,problem remains,my total memory is 4G. The error is printed within a net data send/receive management application which works normaly without osg application.The osg application seems distubed its or others share memory . I will try osg2.9.12 this afternoon. My VirtualPlanetBuilder is a very old version 0.9.1 ,I will also try a new version . I really hope it is not something wrong with Qt itself which is beyond my knowledge and capability,thx! Thank you! Cheers, Lv -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=38724#38724 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
