Results 1 to 4 of 4

Thread: glxgears SLOWER with nvidia vector card when full-screen

  1. #1
    Join Date
    Jun 2008
    Location
    Luleå, Sweden
    Posts
    39

    Default glxgears SLOWER with nvidia vector card when full-screen

    Hi everyone !

    something weird happens on my PC:

    when I enlarge th glxgears window (full screen) my nvidia card results in a slower frame rate than the humble internal
    intel graphics controller:

    This is what I got:

    Code:
    mimis@goldberg:~/learning/aster/contact/cnt1$ inxi -G
    Graphics:  Card-1: Intel 3rd Gen Core processor Graphics Controller 
               Card-2: NVIDIA Device 1212 
               X.Org: 1.13.2 drivers: intel (unloaded: fbdev,vesa) Resolution: 1920x1080@60.0hz 
               GLX Renderer: Mesa DRI Intel Ivybridge Mobile GLX Version: 3.0 Mesa 9.0.2
    Code:
    mimis@goldberg:~/learning/aster/contact/cnt1$ optirun inxi -G
    Graphics:  Card-1: Intel 3rd Gen Core processor Graphics Controller                                                                                                  
               Card-2: NVIDIA Device 1212                                                                                                                                
               X.Org: 1.13.2 drivers: intel (unloaded: fbdev,vesa) Resolution: 1920x1080@60.0hz                                                                          
               GLX Renderer: GeForce GTX 675M/PCIe/SSE2 GLX Version: 4.4.0 NVIDIA 334.21
    and this what I get when I run glxgears fullscreen (optirun glxgears produces a visibly shacking result):
    Code:
    mimis@goldberg:~/learning/aster/contact/cnt1$ glxgears
    Running synchronized to the vertical refresh.  The framerate should be
    approximately the same as the monitor refresh rate.
    303 frames in 5.0 seconds = 60.490 FPS
    300 frames in 5.0 seconds = 59.982 FPS
    300 frames in 5.0 seconds = 59.994 FPS
    300 frames in 5.0 seconds = 59.985 FPS
    300 frames in 5.0 seconds = 59.989 FPS
    Code:
    mimis@goldberg:~/learning/aster/contact/cnt1$ optirun glxgears
    2199 frames in 5.0 seconds = 436.606 FPS
    172 frames in 5.0 seconds = 34.220 FPS
    181 frames in 5.0 seconds = 36.168 FPS
    why is this happening? where should I start looking?

    best regards to everyone

    m

  2. #2
    Join Date
    Jun 2009
    Location
    Mangfall, Germany
    Posts
    1,507

    Default Re: glxgears SLOWER with nvidia vector card when full-screen

    hi m,

    observation

    glxgears measures the frames it can draw in the window it occupies,
    hence the smaller the window the higher the output figure,
    the larger the window the small the figure.

    the figure produced should be inversely proportional to the pixels
    it has to update

    have fun

  3. #3
    Join Date
    Nov 2009
    Location
    West Virginia Sector 13
    Posts
    15,798

    Default Re: glxgears SLOWER with nvidia vector card when full-screen

    Well can have many causes I don't have a hybrid graphics machine and my old 6800+ NVIDIA card is dated
    This is with sync to vertical off
    Code:
    gogalthorp@linux1:~> glxgears
    12874 frames in 5.0 seconds = 2574.723 FPS
    13048 frames in 5.0 seconds = 2609.283 FPS
    11636 frames in 5.0 seconds = 2327.125 FPS
    7532 frames in 5.0 seconds = 1505.424 FPS
    2221 frames in 5.0 seconds = 443.999 FPS
    2100 frames in 5.0 seconds = 419.674 FPS
    1957 frames in 5.0 seconds = 391.276 FPS
    1977 frames in 5.0 seconds = 395.392 FPS
    This is with sync to vertical on

    Code:
    gogalthorp@linux1:~> glxgears
    Running synchronized to the vertical refresh.  The framerate should be
    approximately the same as the monitor refresh rate.
    301 frames in 5.0 seconds = 60.097 FPS
    300 frames in 5.0 seconds = 59.899 FPS
    300 frames in 5.0 seconds = 59.903 FPS
    300 frames in 5.0 seconds = 59.846 FPS
    300 frames in 5.0 seconds = 59.902 FPS
    300 frames in 5.0 seconds = 59.953 FPS
    300 frames in 5.0 seconds = 59.887 FPS
    You can see where I switched to full screen in the no sync to vert example. You can't in the sync to vert example

    You can switch the settings in the nvidia-settings program

    Don't know how to switch settings for the Intel. Sure you can someplace

  4. #4
    Join Date
    Nov 2009
    Location
    West Virginia Sector 13
    Posts
    15,798

    Default Re: glxgears SLOWER with nvidia vector card when full-screen

    Also in a hybrid system the rendering is actually done by the Intel It is what makes Intel+NVIDIA such an odd *******ized system

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •