How to get the average/max process scheduling latency

[Teto]

Hi,

I would like to retrieve the average latency between 2 schedulings of
an application. The purpose is to model the service time of the
application (ie. How fast it can empty the TCP buffer).

I could not find an answer yet. I've found that on latest kernel
latency is on average around 3us with a max at 64us (I consider a
moderate load). Is that correct ?

Regards
Matt