Re: inter-packet gap in pktgen

[Robert Olsson <Robert.Olsson@xxxxxxxxxxx>]

Lennert Buytenhek writes:
 > 
 > Another option is:
 > 
 >      next_tx = get_time_in_ns();
 >      while (--count) {
 >              tx_packet();
 >              next_tx += 1e9/intended_pps;
 >              nanospin(next_tx - get_time_in_ns());
 >      }

 Hello!

 I think this what Ben is doing with his userland app. Ev. adjusting
 the ipg delay in runtime? A kind of control system. Even the device 
 stats could possible be read.

 
 > This should be relatively independent of system load.  OK, I know,
 > time to show some code.
 
 Also an idea might be to have some kind of option to use pktgen w. 
 existent qdisc/tc infrastructure for this type of tests. Ben did
 you try this?
 
                                                --ro