I've observed the same with Nvidia and the samegame, but I've seen the same process eat just a few percent two months ago. I'm confident that it's just a plain old bug instead of a fundamental problem with Qt 5's architecture :)
Simon -- Sendt fra min Nokia N901.09.12 08:05 skrev ext 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 <[email protected]> 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 > <[email protected] <mailto:[email protected]>> 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 > > _______________________________________________ > Development mailing list > [email protected] <mailto:[email protected]> > http://lists.qt-project.org/mailman/listinfo/development > > > > > _______________________________________________ > Development mailing list > [email protected] > http://lists.qt-project.org/mailman/listinfo/development > -- Jeff Tranter, Consulting Manager, Integrated Computer Solutions. ICS - Delivering World-Class Applications for Embedded & Mobile Devices http://ics.com/services/ _______________________________________________ Development mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/development _______________________________________________ Development mailing list [email protected] http://lists.qt-project.org/mailman/listinfo/development
