[visionegg] Re: (no subject)

Dear Vera,

The histogram lists the number of occurances of each
"inter-frame-interval" (IFI). This is the time it take between the video
card drawing frames. Thus, if your monitor is displaying at 60 Hz, your
IFI should be 16.667 msec (with VSYNC on). Often the first frame has an
IFI less than this because the video card doesn't have to wait as long
for a VSYNC. But an IFI longer than this indicates that frames were dropped.

The histogram you sent indicates that 3 frames may have been dropped.

Cheers!
Andrew

Hexe Berg wrote:

>Is it possible to get some information about the content of the logfile that 
>is written by "frame_timer.log_histogram()".
>2006-07-05 16:22:10,280 (2392) INFO: Script C:\Documents and Settings\vera\My 
>Documents\Python_versuche\put_pixels1.py started Vision Egg 1.0 with process 
>id 2392.
>2006-07-05 16:22:13,296 (2392) INFO: Requesting window 1600 x 1200 32 bpp (8 8 
>8 0 RGBA).
>2006-07-05 16:22:13,530 (2392) INFO: OpenGL 2.0.5646 WinXP Release, RADEON 
>X800 XT x86/SSE2, ATI Technologies Inc.
>2006-07-05 16:22:13,530 (2392) INFO: Video system reports 32 bpp (8 8 8 8 
>RGBA).
>2006-07-05 16:22:20,530 (2392) INFO: 190 frames were drawn.
>Mean IFI was 21.55 msec (46.41 fps), longest IFI was 1062.89 msec.
>histogram:
>   102                                              *                     
>    90                                              *                     
>    79                                              *                     
>    68                                              *                     
>    57                                              *                     
>    45                                              *                     
>    34                                    *         *                     
>    23                                    *    *    *                     
>    11                                    *    *    *                     
>     0                *              *    *    *    *    *              * 
> Time:    0    2    4    6    8   10   12   14   16   18   20   22   24 +(msec)
>Total:      0    0    1    0    0    1    45   24  113   2    0    0    3  
>
>is IFI = inter frame intervall?
>
>sincerely yours
>Vera Bauhoff
>  
>

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