[dpdk-dev] [PATCH v3 0/3] RCU integration with LPM library

[Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>]

This patch set is dependent on https://patches.dpdk.org/cover/60270/

This patchset integrates RCU QSBR support with LPM library.

Please refer to RCU documentation in the above mentioned patch series.
This patch set follows the suggested design of integrating RCU
library with other libraries in DPDK.

RCU is used to safely free tbl8 groups that can be recycled.
tbl8 groups will not be reclaimed or reused until readers stopped
referencing it.

This is implemented as an optional feature to ensure the existing
applications are not affected. New API rte_lpm_rcu_qsbr_add is
introduced for application to register a RCU variable that
LPM library will use. This provides user the handle to enable
this feature.

v3:
1) Integration with new RCU defer queue APIs (much smaller and simpler
   code in LPM library itself)
2) Separated the 'test/lpm: reset total time' patch from this series
3) Added multi-writer performance test. The performance difference
   between with and without RCU varies and is not small for
   multi-writer. However, this is due to the tbl8 group allocation
   algorithm in LPM, which is a linear search algorithm (given that
   the test case uses large number of tbl8 groups). We should look
   to change this algorithm to O(1) in the future.
4) Incorporated applicable feedback from Vladimir

Honnappa Nagarahalli (1):
  test/lpm: add RCU integration performance tests

Ruifeng Wang (2):
  lib/lpm: integrate RCU QSBR
  app/test: add test case for LPM RCU integration

 app/test/test_lpm.c                | 152 ++++++++-
 app/test/test_lpm_perf.c           | 487 ++++++++++++++++++++++++++++-
 lib/librte_lpm/Makefile            |   3 +-
 lib/librte_lpm/meson.build         |   2 +
 lib/librte_lpm/rte_lpm.c           | 102 +++++-
 lib/librte_lpm/rte_lpm.h           |  21 ++
 lib/librte_lpm/rte_lpm_version.map |   6 +
 7 files changed, 757 insertions(+), 16 deletions(-)

-- 
2.17.1