[Differential] [Request, 151 lines] D1708: sfxge: Separate software Tx queue limit for non-TCP traffic

[arybchik (Andrew Rybchenko)]

arybchik created this revision.
arybchik added a reviewer: gnn.
arybchik added a subscriber: freebsd-net.

REVISION SUMMARY
  Add separate software Tx queue limit for non-TCP traffic to make total
  limit higher and avoid local drops of TCP packets because of no
  backpressure.
  There is no point to make non-TCP limit high since without backpressure
  UDP stream easily overflows any sensible limit.
  
  Split early drops statistics since it is better to have separate counter
  for each drop reason to make it unabmiguous.
  
  Sponsored by:   Solarflare Communications, Inc.

BRANCH
  /head

REVISION DETAIL
  https://reviews.freebsd.org/D1708

AFFECTED FILES
  share/man/man4/sfxge.4
  sys/dev/sfxge/sfxge_port.c
  sys/dev/sfxge/sfxge_tx.c
  sys/dev/sfxge/sfxge_tx.h

To: arybchik, gnn
Cc: freebsd-net