From: Eric Dumazet <eric.duma...@gmail.com> Date: Tue, 26 Apr 2016 15:30:07 -0700
> From: Eric Dumazet <eduma...@google.com> > > sd->input_queue_head is incremented for each processed packet > in process_backlog(), and read from other cpus performing > Out Of Order avoidance in get_rps_cpu() > > Moving this field in a separate cache line keeps it mostly > hot for the cpu in process_backlog(), as other cpus will > only read it. > > In a stress test, process_backlog() was consuming 6.80 % of cpu cycles, > and the patch reduced the cost to 0.65 % > > Signed-off-by: Eric Dumazet <eduma...@google.com> Applied, nice work Eric.
