[PD] Syncing an event with refresh rate in GEM

Mathieu Bouchard matju at artengine.ca
Fri Oct 12 21:03:20 CEST 2007

On Fri, 12 Oct 2007, chris clepper wrote:

> Note that every other frame pattern.  Why is that?  The low number is
> probably a fairly accurate number for the CPU to fetch the frame from disk,
> decode and then fling it up onto the GPU for texturing, but what about the
> other number?  Add the two numbers together and they are almost exactly the
> time for two frames to render (about 33 ms at 60fps).  The reason is that
> the driver will wait on the 'no load' frame for the next sync before
> returning which is why it runs too long.

Is it possible to make the frame-display call non-blocking ?

Just like when you read from or write to a socket with O_NONBLOCK so that 
it returns immediately, or use SIGALRM to put a timeout on a read or write 

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| Mathieu Bouchard - tél:+1.514.383.3801, Montréal QC Canada

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