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Is glxgears optimized for 16:9 ratio screen ?
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bookstack
Apprentice
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Joined: 27 Feb 2004
Posts: 245

PostPosted: Sat Sep 17, 2005 4:38 am    Post subject: Is glxgears optimized for 16:9 ratio screen ? Reply with quote

I found a very interesting phenomenon:
Here is the test result with 855resolution, the higher FPS is achieved in the default window, the lower is got in the full screen mode.
Code:

2483 frames in 5.0 seconds = 496.600 FPS
2479 frames in 5.0 seconds = 495.800 FPS
2386 frames in 5.0 seconds = 477.200 FPS
361 frames in 5.0 seconds = 72.200 FPS
313 frames in 5.0 seconds = 62.600 FPS
313 frames in 5.0 seconds = 62.600 FPS
313 frames in 5.0 seconds = 62.600 FPS


While the result in default mode w/o 855resolution is much better:
Code:

2892 frames in 5.0 seconds = 578.400 FPS
2894 frames in 5.0 seconds = 578.800 FPS
2895 frames in 5.0 seconds = 579.000 FPS
1573 frames in 5.0 seconds = 314.600 FPS
463 frames in 5.0 seconds = 92.600 FPS
462 frames in 5.0 seconds = 92.400 FPS

The above test result is run in the same machine, after a clean reboot.

It seems the glxgears is not optimized for 16:9 ration screen. Could you post your result w and w/o 855resolution ?
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Archangel1
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Joined: 21 Apr 2004
Posts: 1212
Location: Work

PostPosted: Sat Sep 17, 2005 4:59 am    Post subject: Reply with quote

Uhm, I think the obvious explanation is that if you've used 855resolution to get a widescreen resolution, it'll have more pixels than whatever you were using without it (say 1280x768 vs 1024x768).
Hence the video card has to draw more pixels, so it's slower.

I highly doubt glxgears is optimised for _anything_, let alone a 16x9 screen - and it's not like you really can optimise for that anyway...
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