[ovs-dev] [PATCH 0/7] user defined events and notification

[Gowrishankar Muthukrishnan]

This patchset enables new feature "user defined events and notification".
In short, by this feature, one can enable asynchronous and less intrusive
monitoring in Openvswitch data plane and control plane resources, by
defining one or more events to populate inside Openvswitch. Based on the
type of the event, their behaviour is defined (to wait for some condition
be met or to inform in work flow). More information on how to use this
feature is in Documentation/topics/user-defined-events.rst.

This feature is targeting troubleshooting and live debugging situations
in production deployment, hence more helpful for operators and developers
debugging functional and performance issues in Openvswitch. This proposal
is not extensively coveraing all traceable places in Openvswitch, but 
demonstrating how it can be helpful and be extended based on the usecases.
Based on how it is perceived, I can work on enhancing this for optimations
whereever needed.

Gowrishankar Muthukrishnan (7):
  event: add api to manage user defined events
  stopwatch: expose required api for event library
  dpif: hook timer event api in datapath functions
  coverage: support conditional notification from events
  event: test daemon to receive notification from event api
  event: documentation notes on event library
  system-event: add event testsuite

 Documentation/automake.mk                    |   1 +
 Documentation/topics/index.rst               |   1 +
 Documentation/topics/user-defined-events.rst | 306 +++++++++++
 lib/automake.mk                              |   2 +
 lib/coverage.c                               |  61 +++
 lib/coverage.h                               |   4 +
 lib/dpif-netdev.c                            |   5 +-
 lib/event.c                                  | 764 +++++++++++++++++++++++++++
 lib/event.h                                  | 269 ++++++++++
 lib/netdev-dpdk.c                            |   3 +
 lib/stopwatch.c                              |  20 +-
 lib/stopwatch.h                              |   9 +
 lib/timeval.c                                |   3 +
 tests/automake.mk                            |  18 +
 tests/system-event.at                        | 351 ++++++++++++
 utilities/automake.mk                        |   6 +-
 utilities/ovs-testeventd.c                   | 156 ++++++
 vswitchd/bridge.c                            |   2 +
 18 files changed, 1978 insertions(+), 3 deletions(-)
 create mode 100644 Documentation/topics/user-defined-events.rst
 create mode 100644 lib/event.c
 create mode 100644 lib/event.h
 create mode 100644 tests/system-event.at
 create mode 100644 utilities/ovs-testeventd.c

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1.8.3.1