Hi,

 With really old kernels (100Hz) if You do sleep(1ms)  You sleep for  
10ms on average.
 With enterprise kernels (250Hz) Your sleep resolution increases by a  
factor of 4.
 With fresh kernels (1000Hz) You get real 1ms timer resolution -  
10fold increase compared to old kernels.

 With tickless You get whatever resolution You want - eg when You  
sleep for 100 microseconds(micro not mili) then You get exactly what  
You wish for.

 Now for reasons I do no try to understand :) there are a lot of  
really short sleeps and fast timers in FreeSwitch - like 100  
micro(1/10th of a ms).
 So with CentOS such a 100 microsecond sleep cannot "fire" faster  
then 250 times a second.
 With tickless kernel same 100 microsecond sleep "fires" 10k times a  
second.

Pawel,

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