[dpdk-dev] [PATCH 0/3] lpm6: speed improvement on delete rule

Nikita Kozlov nikita at elyzion.net
Thu Jun 9 02:53:51 CEST 2016

This serie of pathes focus on improving the speed of deleting rules in lpm6.

It also contains some other improvement like having a dynamic number of
rules in lpm6 and increasing the lpm6 nexthop size to 16bit for matching
the nexthop size in lpm4.

The performances improvement can be seen by running test_lpm6_perf but
because of the limited number of rules added (1000) the improvement seen is
just about a x10 with this test.

For testing it further we have tested it with a full ipv6 bgp view which 
represent 29296 routes in our test:
* With the dpdk 16.04 it tooks an average of 8.46095e+09 cycles to delete a rule
(calculated with mesuring rte_rdtsc before and after the delete, the
average is calculated by the first 10 delete, it represents several
seconds on a E5-2650 v2)
* With the patch it tooks 10077.1 cycles (same number of deleted rules,
same machine, same rules inserted) for the same test.

This patch was written in collaboration with Baptiste Daroussin from Gandi.

Nikita Kozlov (3):
  lpm6 speed inmprovement on delete rule
  librte_eal: Import FreeBSD sys/tree.h into librte_eal/common
  test_lpm6: make test_lpm6* compatible with the new rte_lpm6.c lib

 app/test/test_lpm6.c                     | 131 ++---
 app/test/test_lpm6_perf.c                |   5 +-
 lib/librte_eal/common/Makefile           |   2 +-
 lib/librte_eal/common/include/sys/tree.h | 801 +++++++++++++++++++++++++++++++
 lib/librte_lpm/Makefile                  |   2 +-
 lib/librte_lpm/rte_lpm6.c                | 576 ++++++++++++++++------
 lib/librte_lpm/rte_lpm6.h                |  49 +-
 lib/librte_lpm/rte_lpm_version.map       |  12 +
 lib/librte_table/rte_table_lpm_ipv6.c    |   7 +-
 9 files changed, 1348 insertions(+), 237 deletions(-)
 create mode 100644 lib/librte_eal/common/include/sys/tree.h


More information about the dev mailing list