[dpdk-dev] [PATCH v3 0/3] EAL change for using a config file for DPDK

Jacek Piasecki jacekx.piasecki at intel.com
Tue Jun 27 12:52:37 CEST 2017

This patchset introduce a mechanism for running dpdk application with parameters
provided by configuration file.

A new API for EAL takes a config file data type - either loaded from file,
or built up programmatically in the application - and extracts DPDK parameters
from it to be used when eal init is called. This allows apps to have
an alternative method to configure EAL, other than via command-line parameters.

Testpmd application is used to the demonstrate the new eal API.
If a --cfgfile-path <path> option is passed into command line non EAL section,
then the file is loaded and used by app. If a file called config.ini
is present in current working directory, and no --cfgfile-path option is
passed in, config.ini file will be loaded and used by app.

Last patch demonstrates the usage of JSON file format insted of config.ini
JSON file can be called the same way as above, thru --cfgfile-path <path>

	split one patchset into two distinct patchsets:
	1. cfgfile library and TEST app changes
	2. EAL changes and examples (this patchset depends on cfgfile)
  lib eal:
  	Rework of rte_eal_configure(struct rte_cfgfile *cfg, char *prgname).
	Now this function load data from cfg structure and did initial
	initialization of EAL arguments. Vdev argument are stored in different
	subsections eg. DPDK.vdev0, DPDK.vdev1 etc. After execution of this
	function it is necessary to call rte_eal_init to complete EAL
	initialization. There is no more merging arguments from different
	sources (cfg file and command line).
  	Added non_eal_configure to testpmd application.
	Function maintain the same functionality as rte_eal_configure but
	for non-eal arguments. 
  	Added config JSON feature to testpmd last patch from patchset contain
	example showing use of .json configuration files.

  lib cfgfile:
  	Rework of add_section(), add_entry() new implementation
  	New members allocated_entries/sections, free_entries/sections
	in rte_cfgfile structure, change in array of pointers
	**sections, **entries instead of *sections[], *entries[]
  	Add  set_entry() to update/overwrite already existing entry in cfgfile
  	Add save() function to save on disc cfgfile structure in INI format
  	Rework of existing load() function  simplifying the code
  	Add unit test realloc_sections() in TEST app for testing realloc/malloc
	of new API functions, add test for save() function

Kuba Kozak (3):
  eal: add functions parsing EAL arguments
  app/testpmd: changed example to parse options from cfg file
  app/testpmd: add parse arguments from JSON config file

 app/test-pmd/Makefile                           |    6 +
 app/test-pmd/config.ini                         |   24 +
 app/test-pmd/config.json                        |   33 +
 app/test-pmd/parameters.c                       | 1193 +++++++++++++----------
 app/test-pmd/testpmd.c                          |  159 ++-
 app/test-pmd/testpmd.h                          |    3 +-
 config/common_base                              |    6 +
 lib/Makefile                                    |    6 +-
 lib/librte_eal/bsdapp/eal/Makefile              |    4 +
 lib/librte_eal/bsdapp/eal/eal.c                 |  249 ++++-
 lib/librte_eal/bsdapp/eal/rte_eal_version.map   |    4 +
 lib/librte_eal/common/eal_common_cpuflags.c     |   14 +-
 lib/librte_eal/common/eal_common_lcore.c        |   11 +-
 lib/librte_eal/common/eal_common_options.c      |    5 +
 lib/librte_eal/common/include/rte_eal.h         |   21 +
 lib/librte_eal/linuxapp/eal/Makefile            |    3 +
 lib/librte_eal/linuxapp/eal/eal.c               |  353 +++++--
 lib/librte_eal/linuxapp/eal/rte_eal_version.map |    4 +
 mk/rte.app.mk                                   |    2 +-
 19 files changed, 1469 insertions(+), 631 deletions(-)
 create mode 100644 app/test-pmd/config.ini
 create mode 100644 app/test-pmd/config.json


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