Hi again,
a graphics driver upgrade did the trick ;)
Best regards
Jürgen
Jürgen Löb schrieb:
> Hi,
>
> is it sufficient to enable vsync in driver settings? If so, I did. Even
> if I reduce fps to 10, I get 100% CPU usage. Gfx board in the Windows
> machine is a GeForce 7800 GTX, ForceWave version 81.67. Gfx board I
> tested with linux is quadro 350m, nvidia-drivers-1.0.9755-r1.
>
> Greetings
>
> Jürgen
>
> Robert Osfield schrieb:
>
>> Hi Jürgen,
>>
>> Have you tried enabling vsync?
>>
>> Robert.
>>
>> On 5/22/07, Jürgen Löb <[EMAIL PROTECTED]> wrote:
>>
>>> Hi,
>>>
>>> I have got a problem with high CPU usage (100%) with osg in Win64.
>>>
>>> To narrow the problem I extended the osgviewer code as follows:
>>> -----------------------------------------------
>>> ...
>>> while( !viewer.done() )
>>> {
>>> end_tick=osg::Timer::instance()->tick();
>>>
>>> if(1.0f/60-osg::Timer::instance()->delta_s(start_tick,end_tick)>0)OpenThreads::Thread::microSleep(1000000*1.0f/60-osg::Timer::instance()->delta_s(start_tick,end_tick));
>>>
>>> start_tick=osg::Timer::instance()->tick();
>>> // wait for all cull and draw threads to complete.
>>> viewer.sync();
>>>
>>> // update the scene by traversing it with the the update visitor
>>> which will
>>> // call all node update callbacks and animations.
>>> viewer.update();
>>>
>>> // fire off the cull and draw traversals of the scene.
>>> viewer.frame();
>>>
>>> }
>>> ...
>>> --------------------------------------
>>>
>>> With Linux this Code works perfectly and limits the framerate to
>>> aproximately 50 fps (Should imho be 60 with this code, but that?s not
>>> that important). Thus CPU usage drops on my machine to around 5% (I
>>> know, this is model-dependant.). Running the same Code with WinXP64,
>>> Visual Studio 2005, causes 100% CPU usage with framerate dropping to
>>> around 50 fps. The machine is fast enough. Graphics board is NVidia, so
>>> the known ATI-Bug does not apply.
>>>
>>> Does anyone know if this ist a general Windows problem or only occurs on
>>> Win64 and what causes it? Is there a workaround? I don?t like my
>>> application to eat up all cpu. It is still possible for other Processes
>>> to get CPU-time, but since the viewer seems to "grab" all free CPU-time,
>>> the fan gets loud and if one tried it on a mobile device the application
>>> consumed much more power than necessary.
>>>
>>> Thanks+Best regards
>>>
>>> Jürgen Löb
>>>
>>> --
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>>>
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>>>
>>>
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>
>
>
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