[PATCH v6 0/3] Introduce node-specific xstats in graph library

[<pbhagavatula@marvell.com>]

From: Pavan Nikhilesh <pbhagavatula@marvell.com>

Introduce the ability for nodes to advertise xstats counters during
registration and increment them during the node process function in
the graph library.
This enhancement allows for better stats tracking and debugging
capabilities within the graph framework.

The number of xstats and the mapping of xstat IDs to xstat descriptions
are defined during node registration.

Example:
	static struct rte_node_xstats ip4_reassembly_xstats = {
		.nb_xstats = 1,
		.xstat_desc = {
			[0] = "ip4_reassembly_error",
		},
	};

Here, "ip4_reassembly_error" is mapped to xstat ID 0, and the same ID is
used in the `ip4_reassembly_node_process` function to increment reassembly
errors as an xstat.
Depending on the node, there can be multiple such xstats that can be
updated independently and retrieved using `rte_graph_cluster_stats_get`.

Example:
+-------------------------------+---------------+---------------+--------------+
|Node                           |calls          |objs           |realloc_count |
+-------------------------------+---------------+---------------+--------------+
|ip4_lookup                     |1324083        |338965248      |2             |
|       ip4_lookup_error        |               |338965496      |              |
|pkt_drop                       |1324084        |338965504      |1             |
|ethdev_rx-0-0                  |1324086        |338966016      |2             |
|pkt_cls                        |1324086        |338966016      |1             |
+-------------------------------+---------------+---------------+--------------+

v2 Changes:
- Fix compilation.
v3 Changes:
- Resend as 1/5 didn't make it through.
v4 Changes:
- Address review comments.
- Rebase on main branch.
v5 Changes:
- Shrink structure member names.(Robin)
- add rte_node_error_increment utility function. (Robin)
- Squash patches. (Robin)
- Update RN, DN. (David)
v6 Changes:
- Rename error to xstat. (Robin)
- Rearranges patches, update SVG fonts.

Pavan Nikhilesh (3):
  graph: add support for node specific xstats
  doc: update graph layout and node anatomy images
  node: add xstats for ip4 nodes

 doc/guides/prog_guide/graph_lib.rst           |  22 +-
 .../prog_guide/img/anatomy_of_a_node.svg      | 329 +++++--
 .../prog_guide/img/graph_mem_layout.svg       | 921 +++++++++++++-----
 doc/guides/rel_notes/deprecation.rst          |   6 -
 doc/guides/rel_notes/release_24_11.rst        |   8 +
 lib/graph/graph_populate.c                    |  20 +-
 lib/graph/graph_private.h                     |   3 +
 lib/graph/graph_stats.c                       |  79 +-
 lib/graph/node.c                              |  37 +-
 lib/graph/rte_graph.h                         |  11 +
 lib/graph/rte_graph_worker_common.h           |  23 +
 lib/graph/version.map                         |   7 +
 lib/node/ip4_lookup.c                         |   9 +
 lib/node/ip4_lookup_neon.h                    |   5 +
 lib/node/ip4_lookup_sse.h                     |   6 +
 lib/node/ip4_reassembly.c                     |   9 +
 lib/node/node_private.h                       |   8 +
 17 files changed, 1193 insertions(+), 310 deletions(-)

--
2.25.1