[Bf-committers] [RFC] Re: Blender profiling-1 O16.2int

[John K. Walton]

On Tue, 26 Aug 2003, Kester Maddock wrote:

> 
> On Sun, Aug 17, 2003 at 11:36:42PM +1000, Con Kolivas wrote:
> > Now normally, blender should just sleep and wait till X comes
> > alive again before it does anything. However here it shows clearly that 
> > it is spinning madly looking for something from X, and poor X can't do 
> > anything. This is the busy on wait I've described.
> 
> > Second, any applications that exhibit this should be fixed since it is a bug. 
> 
> Say if blender is polling the mouse in the view rotate loop?  (If so, you 
> should be able to just hold down the middle mouse to starve, without moving 
> the mouse.)

yes i've mentioned this in the past. holding the middle mouse or right
mouse button _without_doing_anything_ eats up cpu time. it is clearly
a waste of cpu time. nobody responded.

> Is this really a bug in the application?  Blender is interactive while rotating 
> the view.  More CPU means more frames per second which gives the user a
> better experience.  The CPU usage will drop down when the user releases the
> middle mouse button.
> 
> (OK, in this specific case blender could update the screen on mouse move 
> events, but what about the general case eg a 3d game, where the screen
> is updated by eg monster ai?)
> 
> And how do you fix it?  Would sleep(0) in these loops do, or do you need to
> select(...) on X?
> 
> CC me please on replys.
> 
> Thanks,
> 
> Kester Maddock.
> ^ sends occaisional patches to blender.
> 
> 
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