Re: [osg-users] Counting OpenGL Draw calls in Stats
Hi Jason, On 22 February 2012 18:34, Jason Daly jd...@ist.ucf.edu wrote: I'm interested in determining how many OpenGL draw calls are made during the rendering of a frame (counting and storing them as a Stats variable). I'm sure this is possible, but I wonder if it would be feasible to do without significantly affecting performance. Anyone have any thoughts? The OSG doesn't have any stats collection on individual OpenGL draw calls, such low level instrumentation would be rather expensive to implement code wise and expensive w.r.t run-time cost. The best solution for this type of low level instrumentation is to use a wrapper around the OpenGL driver as suggested by others in this thread. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Counting OpenGL Draw calls in Stats
On 02/23/2012 05:22 AM, Robert Osfield wrote: The OSG doesn't have any stats collection on individual OpenGL draw calls, such low level instrumentation would be rather expensive to implement code wise and expensive w.r.t run-time cost. The best solution for this type of low level instrumentation is to use a wrapper around the OpenGL driver as suggested by others in this thread. Hi, Robert, I was afraid you'd say that :-) Thanks for the reply. --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Counting OpenGL Draw calls in Stats
Hi, all, I'm interested in determining how many OpenGL draw calls are made during the rendering of a frame (counting and storing them as a Stats variable). I'm sure this is possible, but I wonder if it would be feasible to do without significantly affecting performance. Anyone have any thoughts? --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Counting OpenGL Draw calls in Stats
gDEBugger has the ability to view OpenGL Call history. Can't speak on the performance hit. But, sounds like you need it in the app itself. I don't know of an internal mechanism. However, should be able to easily CASE a thin inlined OpenGL layer with metrics embedded. -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jason Daly Sent: Wednesday, February 22, 2012 11:35 AM To: osg-users@lists.openscenegraph.org Subject: [osg-users] Counting OpenGL Draw calls in Stats Hi, all, I'm interested in determining how many OpenGL draw calls are made during the rendering of a frame (counting and storing them as a Stats variable). I'm sure this is possible, but I wonder if it would be feasible to do without significantly affecting performance. Anyone have any thoughts? --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Counting OpenGL Draw calls in Stats
Thanks, Bob. I've used gDEBugger for this before, but for this case, I need to get it into the OSG Stats proper. The capability isn't there yet, so I'm looking into adding it. I'm trying to gauge how feasible it would be to add this feature without adversely affecting performance. The current frame Stats don't seem too heavy, but they're mainly taking measurements before and after the frame, not counting events that happen during the frame. --J On 02/22/2012 03:22 PM, Buckley, Bob CTR MDA/DES wrote: gDEBugger has the ability to view OpenGL Call history. Can't speak on the performance hit. But, sounds like you need it in the app itself. I don't know of an internal mechanism. However, should be able to easily CASE a thin inlined OpenGL layer with metrics embedded. -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jason Daly Sent: Wednesday, February 22, 2012 11:35 AM To: osg-users@lists.openscenegraph.org Subject: [osg-users] Counting OpenGL Draw calls in Stats Hi, all, I'm interested in determining how many OpenGL draw calls are made during the rendering of a frame (counting and storing them as a Stats variable). I'm sure this is possible, but I wonder if it would be feasible to do without significantly affecting performance. Anyone have any thoughts? --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Counting OpenGL Draw calls in Stats
OpenGL video driver comes to mind. Anything in the spec that facilitates this across platforms? -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jason Daly Sent: Wednesday, February 22, 2012 1:34 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Counting OpenGL Draw calls in Stats Thanks, Bob. I've used gDEBugger for this before, but for this case, I need to get it into the OSG Stats proper. The capability isn't there yet, so I'm looking into adding it. I'm trying to gauge how feasible it would be to add this feature without adversely affecting performance. The current frame Stats don't seem too heavy, but they're mainly taking measurements before and after the frame, not counting events that happen during the frame. --J On 02/22/2012 03:22 PM, Buckley, Bob CTR MDA/DES wrote: gDEBugger has the ability to view OpenGL Call history. Can't speak on the performance hit. But, sounds like you need it in the app itself. I don't know of an internal mechanism. However, should be able to easily CASE a thin inlined OpenGL layer with metrics embedded. -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jason Daly Sent: Wednesday, February 22, 2012 11:35 AM To: osg-users@lists.openscenegraph.org Subject: [osg-users] Counting OpenGL Draw calls in Stats Hi, all, I'm interested in determining how many OpenGL draw calls are made during the rendering of a frame (counting and storing them as a Stats variable). I'm sure this is possible, but I wonder if it would be feasible to do without significantly affecting performance. Anyone have any thoughts? --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Counting OpenGL Draw calls in Stats
A co-worker sent me this: http://www.opengl.org/sdk/tools/GLIntercept/ It wraps opengl32.dll so that it can log all calls to OpenGL Unfortunately, it appears to be Windows only. -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Buckley, Bob CTR MDA/DES Sent: Wednesday, February 22, 2012 2:02 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Counting OpenGL Draw calls in Stats OpenGL video driver comes to mind. Anything in the spec that facilitates this across platforms? -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jason Daly Sent: Wednesday, February 22, 2012 1:34 PM To: OpenSceneGraph Users Subject: Re: [osg-users] Counting OpenGL Draw calls in Stats Thanks, Bob. I've used gDEBugger for this before, but for this case, I need to get it into the OSG Stats proper. The capability isn't there yet, so I'm looking into adding it. I'm trying to gauge how feasible it would be to add this feature without adversely affecting performance. The current frame Stats don't seem too heavy, but they're mainly taking measurements before and after the frame, not counting events that happen during the frame. --J On 02/22/2012 03:22 PM, Buckley, Bob CTR MDA/DES wrote: gDEBugger has the ability to view OpenGL Call history. Can't speak on the performance hit. But, sounds like you need it in the app itself. I don't know of an internal mechanism. However, should be able to easily CASE a thin inlined OpenGL layer with metrics embedded. -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Jason Daly Sent: Wednesday, February 22, 2012 11:35 AM To: osg-users@lists.openscenegraph.org Subject: [osg-users] Counting OpenGL Draw calls in Stats Hi, all, I'm interested in determining how many OpenGL draw calls are made during the rendering of a frame (counting and storing them as a Stats variable). I'm sure this is possible, but I wonder if it would be feasible to do without significantly affecting performance. Anyone have any thoughts? --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Counting OpenGL Draw calls in Stats
On 02/22/2012 05:53 PM, Buckley, Bob CTR MDA/DES wrote: A co-worker sent me this: http://www.opengl.org/sdk/tools/GLIntercept/ It wraps opengl32.dll so that it can log all calls to OpenGL Unfortunately, it appears to be Windows only. Hi, Bob, I'm not really interested in any other solutions outside of OSG itself. What I'm considering specifically is adding code to count the actual OpenGL draw calls made by OSG (mainly in PrimitiveSet.cpp) and placing the count into an osg::Stats variable (much like the FPS, update, cull, and draw times, number of groups and geodes in the scene, etc). I'd like to add GL draw calls as a stat that can be queried in code (and conceivably could be put into the StatsHandler display). I'm just not sure whether or not collecting this count would be too heavy for general use. If it can't be done without a driver layer or some kind of non-standard instrumentation (like gDEBugger), then we'd rather just not do it. --J ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
