Note: the discussion below is for 1.9 only.
Today I added a new option for disabling a z-only pass in the render
layers. The purpose
of this pass is to prefill the zbuffer. On modern 3D hardware this
should give extra
performance. However, on older hardware this extra pass gives no
benefit and instead
just decreases performance.
Currently I disabled this z-only pass for all Intel Graphics hardware.
But I would like
the CS community to test this feature a bit on various kinds of
hardware. Basically I would
like you to test the difference in performance on various types of
levels and applications
with CS with z-only pass enabled versus z-only pass disabled.
To do this test edit data/config-plugins/engine.cfg and uncomment the
following line:
;RenderManager.ZOnly.Enabled = false
If this line is not present then you need to 'svn update' (and build again).
First do a few tests of various apps and levels with the line above
set to 'false'
and then do the same tests with the line above set to 'true'.
I'm interested in:
- The performances of all the tests you did with zonly enabled and disabled.
- The 3D hardware, driver, and OS you have. You can get more information
about this if you run walktest with the -verbose=-scf (note the TWO
dashes) commandline option.
Tips:
- You can view fps in any CS app by using bugplug (-plugin=bugplug on the
commandline).
- In walktest you can use 'tab' to go to the console and then type
'perftest 1000'
to time the speed of rendering 1000 frames. That's the most accurate way to
benchmark levels.
Just send your results as a reply to this email.
Greetings and thanks,
--
Project Manager of Crystal Space (http://www.crystalspace3d.org)
and CEL (http://cel.crystalspace3d.org)
Support Crystal Space. Donate at
https://sourceforge.net/donate/index.php?group_id=649
Personal page: http://users.telenet.be/jorritTyberghein/
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