[glxgears]I think is the update of Xorg

Question

i have this
xf86-video-intel
00:02.0 VGA compatible controller: Intel Corporation Mobile 945GM/GMS, 943/940GML Express Integrated Graphics Controller (rev 03)
00:02.1 Display controller: Intel Corporation Mobile 945GM/GMS/GME, 943/940GML Express Integrated Graphics Controller (rev 03)
that's ok?
[user@equipo ~]$ glxgears
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
298 frames in 5.0 seconds = 59.442 FPS
311 frames in 5.0 seconds = 62.111 FPS
311 frames in 5.0 seconds = 61.973 FPS
311 frames in 5.0 seconds = 62.064 FPS
311 frames in 5.0 seconds = 62.026 FPS
311 frames in 5.0 seconds = 62.063 FPS
311 frames in 5.0 seconds = 61.988 FPS
Last edited by Drake (2010-06-21 21:16:56)

Answer 1

https://wiki.ubuntu.com/X/Troubleshooti … ce#Problem: glxgears has low FPS
Problem: glxgears has low FPS
It is important to note and remember that glxgears is *not* a benchmark tool. It simply measures how fast the driver writes images to the screen, whereas most 3D applications are limited by render speed, not merely blit speed. Instead use a 3D game (flightgear, tremulous, etc.) that has a real rendering workload to make comparisons.
glxgears is installed by default, easy to run, and generates results that are easy to read, so users like to utilize it as a rough measure of performance, and thus the question of why these numbers change comes up quite a bit.
For discussion we can categorize the fps changes into four groups:
1. glxgears drops from XXXX to YYY
This is generally nothing to worry about. High glxgears numbers generally indicate excessively high screen repainting, so if this drops from say 1500 fps to 500 fps, it should not produce any noticeable performance impact.
2. glxgears drops from XXX to YYY
As in #1, these drops are *usually* nothing to worry about, especially if you haven't noticed any change in performance. In *some* cases if you notice a performance drop, glxgears numbers may drop as well, and there may indeed be a correlation. However, glxgears isn't a benchmark, so it does little good to post the numbers (indeed, if anything it flags your post as ill-informed on the subject!)
Instead, get before and after FPS measurements using a 3D game, such as sauerbraten, tuxracer, tremulous, or the like.
3. glxgears drops from XXX to YY (e.g. usually around ~50-60fps)
This may indicate that you have vblank syncing turned on. Is the glxgears fps roughly equal to the refresh rate of your monitor? (LCDs tend to operate at 60Hz, so 50-60fps is common in these cases)
If so, see the previous section for a discussion of vblank settings. Normally vblank is a GOOD thing, but it can cause side-effects. If you are experiencing performance impacts, try disabling vblank.
4. glxgears drops to 30fps or below
Any time glxgears returns fps less than your monitor's refresh rate, it definitely indicates a performance problem.
If the fps seems to hit at about half your monitor refresh rate, it indicates the graphics card is not synchronizing properly, and is missing every other frame request by the monitor.
Solution:
Via driconf: 'Synchronization with vertical refresh (swap intervals)' -> set to 'Never synchronize with vertical refresh'.
Last edited by enihcam (2010-06-22 01:16:18)