[Dev] Tizen use of FIFO & Nice

Kok, Auke-jan H auke-jan.h.kok at intel.com
Thu Dec 12 19:35:26 GMT 2013


On Thu, Dec 12, 2013 at 9:38 AM, Clark, Joel <joel.clark at intel.com> wrote:
> Why does Tizen use FIFO and NICE?  There are more than 500 threads with FIFO
> and NICE affecting the performance of critical elements for reading sensor
> data and updating location etc.

Mostly to prioritize screen update refresh rates. Do you really need
your GPS location to update within a 20ms interval?

Humans can see a single frame drop, easily. Audio is critical too.
Sensor data (apart from touch) is almost irrelevant at the scale that
humans can detect.

Also, even with Nice values set high, applications can still be low
latency. They do not necessarily conflict.

Auke


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