Hi,
bug report submitted.
Interestingly enough, I also tried QT_OPENGL=angle. With this, I don't get any other threads and CPU
usage is still reduced.
Tilman
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:skobow...@caos-gmbh.de]
Gesendet: Thursday, April 13, 2017 11:41 AM
An: Thomas Hartmann <thomas.hartm...@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...@qt-project.org] Im
Auftrag von Henry Skoglund
Gesendet: Thursday, April 13, 2017 11:28 AM
An: qt-creator@qt-project.org; skobow...@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
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