Thanks Stephan. The conclusion makes sense as the SplitViewportHorizontal performs operations on pixels directly. How about the quad buffer stereo? Can you even do that on GTX card?
- Aashish On Mon, Jun 17, 2013 at 3:39 AM, Stephan Rogge <[email protected]>wrote: > Aashish, > > I've made another test on my render node [1] and my desktop PC. The > FPS-drop > depends on the size of the render viewport. To showcase the drop I ran > ParaView in the "SplitViewportHorizontal" mode and play a looped animation > with an empty scene. Then I measured the FPS with three different viewport > sizes: > > Resolution => FPS on render node [1] > 1617 x 906 => 33 FPS (PV window maximized) > 1617 x 702 => 45 FPS > 1617 x 438 => 60 FPS > > Resolution => FPS on desktop PC [2] > 1617 x 906 => 20 FPS (PV window maximized) > 1617 x 707 => 26 FPS > 1617 x 292 => 60 FPS > > Conclusion: The Quadro performs better within that stereo mode, but has > also > a drop of ca. 50 % when the PV window is maximized. > > [1] Render node: > * 2x NVidia Quadro K5000 > * ParaView on git-master (latest) > * Fraps as FPS-Display > * Windows 7 64 Bit > > [2] Desktop PC: > * NVidia GeForce GTX 580 > * ParaView on git-master (latest) > * Fraps as FPS-Display > * Windows 7 64 Bit > > Stephan > > Von: Aashish Chaudhary [mailto:[email protected]] > Gesendet: Freitag, 14. Juni 2013 16:13 > An: Stephan Rogge > Cc: ParaView list > Betreff: Re: [Paraview] FPS drop in stereo mode > > > > On Fri, Jun 14, 2013 at 9:03 AM, Stephan Rogge < > [email protected]> > wrote: > Aashish, > > the quad buffer explenation does make sense. But after some more testing > with the "old" PV version (ParaView_4.0-RC1-51-g2965c8) on a machine with > * a NVidia Quadro 5000 and > * a machine with 2 NVidia Quadro K5000 (SLI), > I observed a FPS drop in all stereo modes except "Crystal Eyes" which is > hard to measure with fraps. The FPS overly is not visible in that stereo > mode. > > As you said earlier, the FPS will drop but not as hard as you have seen on > GTX cards. How does the FPS drop on 5000 compares with the FPS drop on GTX? > > When I use "SplitViewportHorizontal" as stereo mode on my Kepler GPUs I can > see a FPS drop. Interestingly the rate depends on the ParaView's window > size. The smaller the window is the higher the rate and vice versa. I guess > that a post process, which copies pixel between buffers, need some more > time > for execution. Is it possible? > > Yes, that mode performs the copy between buffers to produce the final > image. > > Regards, > Stephan > > Von: Aashish Chaudhary [mailto:[email protected]] > Gesendet: Donnerstag, 13. Juni 2013 17:51 > An: Stephan Rogge > Cc: ParaView list > Betreff: Re: [Paraview] FPS drop in stereo mode > > Hi Stephan, > GeForce GTX 580 are not great for stereo rendering as I believe they don't > support Quad buffered stereo > ( > http://3dvision-blog.com/3840-nvidia-with-a-new-high-end-gpu-namely-the-ge > force-gtx-580/). > In that case, I believe VTK will perform software stereo implementation and > that's why your performance will go down quite a bit. > > I don't have the latest card but normally the consumer level card don't > support stereo that well (although this might not be the case with recent > NVIDIA cards). > > Let us know if you find this performance degradation on your Quadro cards > as > well with latest paraview. > > Thanks, > > > On Thu, Jun 13, 2013 at 11:13 AM, Stephan Rogge > <[email protected]> wrote: > Aashish, > > it doesn't matter which stereo type is activated. I've got only 20 FPS... > This is tested on GeForce GTX 580. The ParaView version is pulled from > latest git-master. > > Surprisingly, this problem does not occurs on my Render-PC of our > CAVE-system. There I have 2 K5000 NV Quadro cards. But the code base is > older (PV RC1), though I have to check it, with an updated code base and > see, whether this fps drop remains. > > Cheers, > Stephan > > Von: Aashish Chaudhary [mailto:[email protected]] > Gesendet: Donnerstag, 13. Juni 2013 16:49 > An: Stephan Rogge > Cc: ParaView list > Betreff: Re: [Paraview] FPS drop in stereo mode > > Hi Stephan, > > What particular stereo type you chose for this comparison? Also what > graphics hardware you have? > > Thanks, > > > On Mon, Jun 10, 2013 at 10:47 AM, Stephan Rogge > <[email protected]> wrote: > Hello, > > I observed an unexpected frame rate drop when using one of PV's supported > stereo modes within an empty scene. > > Considering > * OS: Windows > * V-Sync: On > * Application to display FPS (e.g. www.fraps.com) > * Latest ParaView from git-master > > Following steps should emphasizes the frame rate drop: > 1. Open ParaView without any stereo mode > 2. Rotate or drag the camera in the 3D view for several seconds and watch > at > the frame rate (should be around 60 FPS) > 3. Close ParaView > 4. Open ParaView with "--stereo" flag enabled > 5. Rotate or drag the camera in the 3D view for several seconds and watch > at > the frame rate (should be around 22 FPS) > > Obviously, stereo rendering should take twice the time of a monocular > rendering. But this should only occurs in more complex scenes. Can anyone > reproduce this behavior? Is this a BUG? > > Best regards, > Stephan > > > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Follow this link to subscribe/unsubscribe: > http://www.paraview.org/mailman/listinfo/paraview > > > > > -- > | Aashish Chaudhary > | R&D Engineer > | Kitware Inc. > | www.kitware.com > > > > > -- > | Aashish Chaudhary > | R&D Engineer > | Kitware Inc. > | www.kitware.com > > > > > -- > | Aashish Chaudhary > | R&D Engineer > | Kitware Inc. > | www.kitware.com > > -- | Aashish Chaudhary | R&D Engineer | Kitware Inc. | www.kitware.com
_______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
