[Qt-creator] QtCreator 4.3b1 background thread running?

[Thomas Hartmann]

Hi,

with QT_OPENGL=software I even have 8 opengl32sw threads, but an idle Qt Creator uses less than overall 1% CPU.
The issue you have seems to be related to your graphics stack. Can you provide some details on your graphics stack (drivers, versions) preferably as a bug report (bugreports.qt.io)?

Kind Regards,
Thomas Hartmann


-----Ursprüngliche Nachricht-----
Von: Tilman Skobowsky [mailto:skobowsky at caos-gmbh.de] 
Gesendet: Thursday, April 13, 2017 11:41 AM
An: Thomas Hartmann <Thomas.Hartmann at qt.io>
Betreff: Re: [Qt-creator] QtCreator 4.3b1 background thread running?

Hi,

I was too fast answering the first hint. Now I tried again setting QT_OPENGL and, voilà, the problem is almost gone.
Instead of the one thread using half a CPU core I do have 4 opengl32sw threads which alltogether permanently do something.
At least the Cycles Delta value for each of the 4 thread ranges from 5M to 10M.

Tilman


Am 13.04.2017 um 11:34 schrieb Thomas Hartmann:
> Hi,
>
> -noload Welcome is not required anymore, since the Welcome Page was reimplemented using widgets.
> An alternative to avoid OpenGL issues on Windows is "set QT_OPENGL=software".
> I cannot reproduce the issue on my Windows 10 setup.
>
> Kind Regards,
> Thomas Hartmann
>
> -----Ursprüngliche Nachricht-----
> Von: Qt-creator 
> [mailto:qt-creator-bounces+thomas.hartmann=qt.io at qt-project.org] Im 
> Auftrag von Henry Skoglund
> Gesendet: Thursday, April 13, 2017 11:28 AM
> An: qt-creator at qt-project.org; skobowsky at caos-gmbh.de
> Betreff: Re: [Qt-creator] QtCreator 4.3b1 background thread running?
>
> Hi, you could try starting Qt Creator from a CMD window (universal solution #1 for opengl problems) to see if the CPU consumption subsides:
>
> qtcreator -noload Welcome -noload QmlDesigner -noload QmlProfiler
>
> Rgrds Henry
>
> On 2017-04-13 11:20, Tilman Skobowsky wrote:
>> Hi,
>>
>> I just downloaded Qt-Creator 4.3.0 b1 for some testing.
>> What immediately struck me was the ongoing action in one thread that 
>> consumes about half a CPU core's performance.
>> The stacktrace (taken with ProcessExplorer) is
>>
>> 0    ntdll.dll!ZwRequestWaitReplyPort+0xa
>> 1    dwmapi.dll!DwmSetWindowAttribute+0x1cc
>> 2    dwmapi.dll!DwmSetWindowAttribute+0x3d0
>> 3    dwmapi.dll!Ordinal132+0x97a
>> 4    dwmapi.dll!DwmSetWindowAttribute+0x2cc
>> 5    dwmapi.dll!DwmFlush+0x92
>> 6    ig75icd64.dll!DrvValidateVersion+0x139a
>> 7    kernel32.dll!BaseThreadInitThunk+0xd
>> 8    ntdll.dll!RtlUserThreadStart+0x21
>>
>> Checking on the web I found an entry on the Team Speak forum where 
>> they observed the same issue but with a different Qt-based software.
>> As described there, I can kill the thread without noticing a real 
>> problem when using Qt-Creator.
>>
>> I double checked this with both 32bit and 64bit. The problem occurrs 
>> in both versions.
>> My machine runs Win7
>>
>> Any ideas?
>>
>> TIA
>> Tilman
>> _______________________________________________
>> Qt-creator mailing list
>> Qt-creator at qt-project.org
>> http://lists.qt-project.org/mailman/listinfo/qt-creator
>>
>
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