[Development] Qt 5.0 Beta Performance

[David Boosalis]

Interesting that there are no comments on this. Does it mean that only a
few of us are seeing poor performance due to some driver issue, or that
people aren't concerned with the performance.  But wasn't better
performance the primary motivation for Qt 5 ?



On Fri, Aug 31, 2012 at 11:26 AM, Jeff Tranter <jtranter at ics.com> wrote:

> I see the same thing with the Qt 5 beta 1 installer binary on Ubuntu
> Linux 12.04. When running
>
> Qt5.0.0beta1/Desktop/Qt/5.0.0-beta1/gcc/examples/qtdeclarative/demos/samegame/samegame
> it takes 100% CPU when the game is sitting idle. The machine it is
> running on has Nvidia's OpenGL driver.
>
> On 12-08-31 08:55 AM, David Boosalis wrote:
> > Thank you for the reply.
> >
> > IN anser to your questions, I built Qt 5 with no configure options other
> > then prefix and used the samegame found in
> > "Src/Qt/5.0.0-beta1/qtdeclarative/examples/demos/samegame"
> >
> > ldd on the executable reports:
> > ldd ./samegame
> >          linux-vdso.so.1 =>  (0x00007fff5cf23000)
> >          libQtQuick.so.5 =>
> > /usr/local/Trolltech/Qt-5.0/lib/libQtQuick.so.5 (0x00007f9729fe0000)
> >          libQtGui.so.5 => /usr/local/Trolltech/Qt-5.0/lib/libQtGui.so.5
> > (0x00007f9729a1d000)
> >          libQtCore.so.5 =>
> > /usr/local/Trolltech/Qt-5.0/lib/libQtCore.so.5 (0x00007f9729429000)
> >          libstdc++.so.6 => /usr/lib/x86_64-linux-gnu/libstdc++.so.6
> > (0x00007f9729100000)
> >          libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1
> > (0x00007f9728eea000)
> >          libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6
> (0x00007f9728b2c000)
> >          libQtQml.so.5 => /usr/local/Trolltech/Qt-5.0/lib/libQtQml.so.5
> > (0x00007f97286fa000)
> >          libQtNetwork.so.5 =>
> > /usr/local/Trolltech/Qt-5.0/lib/libQtNetwork.so.5 (0x00007f97283ae000)
> >          libQtV8.so.5 => /usr/local/Trolltech/Qt-5.0/lib/libQtV8.so.5
> > (0x00007f9727d63000)
> >          libGL.so.1 => /usr/lib/fglrx/libGL.so.1 (0x00007f9727b5a000)
> >
> >
> > I am using AMD's Catalysist driver 12.2 with a Radian HD 6800 Card
> >
> >
> >
> > On Thu, Aug 30, 2012 at 11:42 PM, Thiago Macieira
> > <thiago.macieira at intel.com <mailto:thiago.macieira at intel.com>> wrote:
> >
> >     On quinta-feira, 30 de agosto de 2012 17.05.07, David Boosalis wrote:
> >      > I download the latest beta version of Qt 5.0 onto my Linux box
> >     (Kubuntu
> >      > 12.04) . For  a beta it looks real good, but one thing I found
> >     concerning
> >      > was the performance.  I mean even running the demo "samegame"
> >     take over 98%
> >      > of my cpu. Being that it is only the first beta release I am sure
> >     there is
> >      > plenty of room for optimization,   but 98% of my I5-2500 cpu
> seems  a
> >      > little excessive. I did the default configure and build so maybe
> >     it was
> >      > built without any optimization.  Any thoughts on this ?
> >
> >     Which of the samegame examples? If it's the QtQuick2 one, what
> >     OpenGL driver
> >     do you have?
> >
> >     And did you compile in debug or in release mode?
> >     --
> >     Thiago Macieira - thiago.macieira (AT) intel.com <http://intel.com>
> >        Software Architect - Intel Open Source Technology Center
> >           Intel Sweden AB - Registration Number: 556189-6027
> >           Knarrarnäsgatan 15, 164 40 Kista, Stockholm, Sweden
> >
> >     _______________________________________________
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> >
> >
> >
> >
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> >
>
>
> --
> Jeff Tranter, Consulting Manager, Integrated Computer Solutions.
> ICS - Delivering World-Class Applications for Embedded & Mobile Devices
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