Hi,
Just an idea... maybe the database pager thread priority is not set.
Set it to a low priority can help the viewer maintain a better frame
rate maybe...
I'm also interested in this question.
Regards,
Vincent.
Le 15/03/2010 12:15, Trajce (Nick) Nikolov a écrit :
I want to join to this thread with similar experience on Windows. I am
getting the same thing, where the frame rate goes to 2-3fps and then
goes higher to some real time. No idea where it comes from.
-Nick
On Mon, Mar 15, 2010 at 1:03 PM, Adrian Lindberg <[email protected]
<mailto:[email protected]>> wrote:
So I've been getting in to OSG, much thanks to the help here on
the mailing list/forum. But I'm having some issues with
performance which I can't seem to pinpoint.
I use extensive PagedLOD, in a similar way osgTerrain does it
(using quad-trees). For me performance is the king and quality is
secondary, so I want to have a frame rate that is at least 30 fps
at all times (given some minimum requirements). When all LODs are
loaded I get constant 60 fps which is due to the screen synch and
when moving around I tend to get 20-30 fps due to loading.
However, it is not uncommon that the fps dips completely and falls
to sub 1 fps for a short while (up to a few seconds) and then
resumes the 20-30 fps target.
What I've tried so far is to set the
setMaximumNumOfObjectsToCompilePerFrame to a very low value (1)
and set the thread priority for the DatabasePager to low. I'm
using VBO:s for vertex data and am currently running OSX 10.6 with
OSG 2.9.6. For me it's vital to get rid of these dip, I'd much
rather display low res data then getting drops.
Profiling for me through Xcode seems to put the DatabasePager out
of order so I can't really pinpoint why I'm getting these drops.
Any ideas or suggestions?
Cheers,
Adrian
------------------
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=25647#25647
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