[dpdk-dev] [RFC PATCH v8 0/5] Add PIE support for HQoS library

["Liguzinski, WojciechX" <wojciechx.liguzinski@intel.com>]

DPDK sched library is equipped with mechanism that secures it from the bufferbloat problem
which is a situation when excess buffers in the network cause high latency and latency 
variation. Currently, it supports RED for active queue management (which is designed 
to control the queue length but it does not control latency directly and is now being 
obsoleted). However, more advanced queue management is required to address this problem
and provide desirable quality of service to users.

This solution (RFC) proposes usage of new algorithm called "PIE" (Proportional Integral
controller Enhanced) that can effectively and directly control queuing latency to address 
the bufferbloat problem.

The implementation of mentioned functionality includes modification of existing and 
adding a new set of data structures to the library, adding PIE related APIs. 
This affects structures in public API/ABI. That is why deprecation notice is going
to be prepared and sent.

Liguzinski, WojciechX (5):
  sched: add PIE based congestion management
  example/qos_sched: add PIE support
  example/ip_pipeline: add PIE support
  doc/guides/prog_guide: added PIE
  app/test: add tests for PIE

 app/test/autotest_data.py                    |   18 +
 app/test/meson.build                         |    4 +
 app/test/test_pie.c                          | 1065 ++++++++++++++++++
 config/rte_config.h                          |    1 -
 doc/guides/prog_guide/glossary.rst           |    3 +
 doc/guides/prog_guide/qos_framework.rst      |   60 +-
 doc/guides/prog_guide/traffic_management.rst |   13 +-
 drivers/net/softnic/rte_eth_softnic_tm.c     |    6 +-
 examples/ip_pipeline/tmgr.c                  |    6 +-
 examples/qos_sched/app_thread.c              |    1 -
 examples/qos_sched/cfg_file.c                |   82 +-
 examples/qos_sched/init.c                    |    7 +-
 examples/qos_sched/profile.cfg               |  196 ++--
 lib/sched/meson.build                        |   10 +-
 lib/sched/rte_pie.c                          |   86 ++
 lib/sched/rte_pie.h                          |  398 +++++++
 lib/sched/rte_sched.c                        |  228 ++--
 lib/sched/rte_sched.h                        |   53 +-
 lib/sched/version.map                        |    3 +
 19 files changed, 2050 insertions(+), 190 deletions(-)
 create mode 100644 app/test/test_pie.c
 create mode 100644 lib/sched/rte_pie.c
 create mode 100644 lib/sched/rte_pie.h

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2.25.1