[Development] Qt 5.0 Beta Performance

[Robert Knight]

> it takes 100% CPU when the game is sitting idle.

What does the poor man's profiler* say is going on?

Regards,
Rob.

* http://poormansprofiler.org/

On 31 August 2012 19:26, 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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