[Openchrome-users] P4M800 - CPU 100%

Benno Schulenberg bensberg
Mon Feb 12 12:40:01 PST 2007


emachine wrote:
> > emachine wrote:
> > >> I am getting poor performance from my P4M800..  When I run
> > >> glxgears my CPU runs at  nearly at 100%.
> >
> > glxgears runs at 100% cpu because the driver busy-waits for the
> > GPU to complete drawing.
> >
> > /Thomas
>
> I would expect top to tell me that the CPU is waiting then?

But glxgears isn't telling the kernel that it is waiting: to the 
kernel glxgears just seems very busy -- doing just about nothing.  
It's normal, glxgears runs everywhere at 100% CPU usage.

Benno




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