From: Charles Panzarella <chuck@ea...> - 2000-04-26 17:54:43
This is an update to an earlier post about slower performance of OpenGL applications with DRI as compared to indirect rendering on a Voodoo 3500 AGP, Athlon 600 system (kernel version doesn't matter, same problem with 2.2.14, 2.3.51, 2.3.99-pre3). I found that the DRI performance depends to a great deal on which window manager I am using, but I don't know why. As one benchmark, I use the teapot demo from the Mesa distribution. I only get about 7 fps (DRI) when I use Gnome and Enlightenment DR16, but If I use just about any other window manager like twm, WindowMaker, ... I get about 40 fps. As another benchmark, I use the VTK sphere benchmark found at http://www-sop.inria.fr/caiman/personnel/Robert.Riviere/vtk/sphere-bench.html (this requires that you also have the data visualization toolkit VTK already installed). Using a 400x400 window size, 128x128 sphere resolution, I get only 52 kpoly/sec with Gnome/Enlightenment and 378 kpoly/sec when I use twm. The improvement in performance of other OpenGL apps is also noticeably improved. Does any one know of a reason for this. Is it just because Enlightenment is such a resource hog or is there a more fundamental explanation?
Dr. Charles H. Panzarella, Senior Research Associate
Ohio Aerospace Institute @ NASA Glenn Research Center
Cleveland, Ohio 44135
From: Charles Lopes <Charles.Lopes@ie...> - 2000-04-27 08:14:08
Charles Panzarella wrote:
> This is an update to an earlier post about slower performance of OpenGL applications with DRI as compared to indirect rendering on a Voodoo 3500 AGP, Athlon 600 system (kernel version doesn't matter, same problem with 2.2.14, 2.3.51, 2.3.99-pre3).
For testing with 2.2.14, did you manage back porting the kernel drm
modules or did you find sources already ready for 2.2.x linux kernels?
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