[sldev] UDP to TCP/HTTP - performance issues?

[Lawson English]

Callum Lerwick wrote:
> On Wed, 2007-11-14 at 23:57 +1100, Tateru Nino wrote:
>   
>> I'm noting a suspicious stall in the viewer when a presence popup
>> happens. Disabling the popup does not seem to change the behaviour.
>> Getting a friend to log in and log out, the viewer still stalls for a
>> second or so around the time the popup _would_ have appeared if it were
>> enabled. That's another data point for you.
>>     
>
> I've noticed this too. My wife has even complained about it. At one
> point it would even crash, though that seems to have been fixed.
>
> I've also noticed that during periods of high (total?) packet loss, the
> viewer will completely freeze. Which happens often when you're on a less
> than stellar wireless connection. No screen refreshes, CPU usage drops
> to zero. Why is network IO capable of blocking the graphics engine? The
> rest of the machine remains responsive, so I don't think its an
> X11/OpenGL problem.
>   
>   

Betcha it is, indirectly. The GUI is tied directly to the framerate of 
the viewer. I'm willing to be that the redraw process affects all 
aspects of the viewer, not just the GUI and that the converse happens as 
well.


Lawson