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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