very slow performance of glxgears (68 fps)

[Bogdan Burlacu]

On Sat, 31 Jan 2009 21:41:20 +0100
drago01 <drago01 at gmail.com> wrote:

> On Sat, Jan 31, 2009 at 3:30 AM, John Tapsell <johnflux at gmail.com>
> wrote:
> > 2009/1/31 Bryce Harrington <bryce at canonical.com>:
> >> On Fri, Jan 30, 2009 at 01:29:49PM -0800, Eric Anholt wrote:
> >>> > $ glxgears
> >>> > Failed to initialize TTM buffer manager.  Falling back to
> >>> > classic. 300 frames in 5.0 seconds = 59.884 FPS
> >>> > 299 frames in 5.0 seconds = 59.621 FPS
> >>> > 300 frames in 5.0 seconds = 59.818 FPS
> >>>
> >>> glxgears is not a benchmark.
> >>>
> >>> We sync to vblank because running glxgears at 1000fps is dumb.
> >>
> >> I am going to go out on a limb and guess we're going to see a
> >> crapload of reports of "performance regression" due to reduced
> >> glxgears frame rates.
> >
> > What was the purpose in this change?  I have never heard a user
> > complain that glxgears is running too fast, and that they want it to
> > vsync.   What's the use case of this change exactly?
> 
> vsync has nothing to do with "glxgears is too fast", but it avoids
> tearing in real apps.
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you can always put something like:

<driconf>
    <device screen="0" driver="i965">
        <application name="all">
            <option name="vblank_mode" value="3" />
        </application>
        <application name="glxgears" executable="glxgears">
            <option name="vblank_mode" value="0" />
        </application>
    </device>
</driconf>

in your $HOME/.drirc