Re: Why ping latency is smaller with shorter send interval?

On Fri, Oct 02, 2020 at 11:26:00AM +0200, Eric Dumazet wrote:

2) Idle cpus can be put in a power conserving state.
  It takes time to exit from these states, as you noticed.
  These delays can typically be around 50 usec, or more.

This is often the case in my experience. I'm even used to starting a
busy loop in SCHED_IDLE prio on certain machines or in certain VMs
just to keep them busy, and to see the ping latency cut in half.

Willy