Select() vs Netmap

[Fred Pedrisa]

Hey, guys.

 

 

I'm currently experiencing a strange issue in my program (Using netmap).

 

Sometimes, when I call select() in a FD, it gets like 4~8 packets per event,
however suddenly it drops to 1~2 packets per event, losing a lot of
performance and increasing the number of select calls necessary to poll the
NIC for new packets.

 

Is there any type of tweak I can do, to make this behavior becomes linear
and sustain the performance in such case without these oscillations ?

 

The behavior happens under the same stressing circumstances, around 1.4
Mpps~ (64 byte packets).

 

 

Sincerely,

 

Fred