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[v2,net-next,0/2] net: prepare pacing offload support

Message ID 20241002151220.349571-1-edumazet@google.com (mailing list archive)
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Series net: prepare pacing offload support | expand

Message

Eric Dumazet Oct. 2, 2024, 3:12 p.m. UTC 
Some network devices have the ability to offload EDT (Earliest
Departure Time) which is the model used for TCP pacing and FQ
packet scheduler.

Some of them implement the timing wheel mechanism described in
https://saeed.github.io/files/carousel-sigcomm17.pdf
with an associated 'timing wheel horizon'.

In order to upstream the NIC support, this series adds :

1) timing wheel horizon as a per-device attribute.

2) FQ packet scheduler support, to let paced packets
   below the timing wheel horizon be handled by the driver.

v2: addressed Jakub feedback
   ( https://lore.kernel.org/netdev/20240930152304.472767-2-edumazet@google.com/T/#mf6294d714c41cc459962154cc2580ce3c9693663 )

Eric Dumazet (1):
  net: add IFLA_MAX_PACING_OFFLOAD_HORIZON device attribute

Jeffrey Ji (1):
  net_sched: sch_fq: add the ability to offload pacing

 .../networking/net_cachelines/net_device.rst  |  1 +
 include/linux/netdevice.h                     |  4 +++
 include/uapi/linux/if_link.h                  |  1 +
 include/uapi/linux/pkt_sched.h                |  2 ++
 net/core/rtnetlink.c                          |  4 +++
 net/sched/sch_fq.c                            | 33 +++++++++++++++----
 tools/include/uapi/linux/if_link.h            |  1 +
 7 files changed, 40 insertions(+), 6 deletions(-)