[dpdk-dev] [PATCH v2 0/5] change lpm route table from code to data

[Bruce Richardson]

This patchset takes the existing lpm large routing table information and
converts it from a header file included at compile time to a resource linked
in. This improves things in two ways:
1. Improves DPDK build time
2. Removes approx 1 million lines of code from our LOC counts, as the header
   file no longer counts as code, but more correctly as data.

Before and after approx code stats (with some additional patchsets applied)
are given below.  Notice how the app folder has dropped from being the biggest
component with 6x the drivers code to second place with less code than the
drivers.

Future work is to repeat the same process for lpm6. Additional work for both
lpm and lpm6 is to remove the routing tables entirely and replace them with
auto-generated data that gives the roughly the same results. That would
shrink the overall size of DPDK releases, and is the desired end state.

---

This patchset is based directly on the original RFC submitted:
http://www.dpdk.org/ml/archives/dev/2016-May/038478.html.

Updates in this version compared to RFC:
* rebased on dpdk.org HEAD. The changes are now mostly to test_lpm_perf.c
  rather than test_lpm.c
* removed use of strndupa() as suggest by Nikita Koslov

---

## Before:

SLOC    Directory       SLOC-by-Language (Sorted)
1237464 app             ansic=1236324,python=1140
192107  drivers         ansic=192107
108109  lib             ansic=107968,python=141
65447   examples        ansic=65312,sh=135
849     tools           python=444,sh=405
799     scripts         sh=799
77      doc             python=75,sh=2
0       config          (none)
0       mk              (none)
0       pkg             (none)
0       top_dir         (none)


Totals grouped by language (dominant language first):
ansic:      1601711 (99.80%)
python:        1800 (0.11%)
sh:            1341 (0.08%)

-----------

## After

SLOC    Directory       SLOC-by-Language (Sorted)
192107  drivers         ansic=192107
160646  app             ansic=159506,python=1140
108109  lib             ansic=107968,python=141
65447   examples        ansic=65312,sh=135
849     tools           python=444,sh=405
799     scripts         sh=799
77      doc             python=75,sh=2
0       config          (none)
0       mk              (none)
0       pkg             (none)
0       top_dir         (none)


Totals grouped by language (dominant language first):
ansic:       524893 (99.41%)
python:        1800 (0.34%)
sh:            1341 (0.25%)

generated using David A. Wheeler's 'SLOCCount'

Bruce Richardson (5):
  test: fix unneeded routes table include from lpm test
  test: make all lpm routes be of unsigned type
  test: add lpm routes as a linked resource
  test: change lpm test to use routes as resource
  test: change lpm routes file from header to data file

 app/test/Makefile                                  |  1 +
 app/test/test_lpm.c                                |  2 +-
 app/test/test_lpm_perf.c                           | 78 +++++++++++++++++++++-
 .../{test_lpm_routes.h => test_lpm_routes.dat}     |  2 +-
 4 files changed, 80 insertions(+), 3 deletions(-)
 rename app/test/{test_lpm_routes.h => test_lpm_routes.dat} (99%)

-- 
2.5.5