[PATCH v4 2/5] graph: add node fastpath error counters

[pbhagavatula]

From: Pavan Nikhilesh <pbhagavat...@marvell.com>

Add node fastpath error counters advertised during
node registration.

Signed-off-by: Pavan Nikhilesh <pbhagavat...@marvell.com>
---
 lib/graph/graph_populate.c          | 20 ++++++++++++++++++--
 lib/graph/graph_private.h           |  2 ++
 lib/graph/rte_graph_worker_common.h |  1 +
 3 files changed, 21 insertions(+), 2 deletions(-)

diff --git a/lib/graph/graph_populate.c b/lib/graph/graph_populate.c
index ed596a7711..9c4c919e14 100644
--- a/lib/graph/graph_populate.c
+++ b/lib/graph/graph_populate.c
@@ -39,6 +39,15 @@ graph_fp_mem_calc_size(struct graph *graph)
                /* Pointer to next nodes(edges) */
                sz += sizeof(struct rte_node *) * graph_node->node->nb_edges;
        }
+       sz = RTE_ALIGN(sz, RTE_CACHE_LINE_SIZE);
+       graph->errors_start = sz;
+       /* For 0..N node objects with error counters */
+       STAILQ_FOREACH(graph_node, &graph->node_list, next) {
+               if (graph_node->node->errs == NULL)
+                       continue;
+               sz = RTE_ALIGN(sz, RTE_CACHE_LINE_SIZE);
+               sz += sizeof(uint64_t) * graph_node->node->errs->nb_errors;
+       }

        graph->mem_sz = sz;
        return sz;
@@ -64,6 +73,7 @@ graph_header_popluate(struct graph *_graph)
 static void
 graph_nodes_populate(struct graph *_graph)
 {
+       rte_graph_off_t err_off = _graph->errors_start;
        rte_graph_off_t off = _graph->nodes_start;
        struct rte_graph *graph = _graph->graph;
        struct graph_node *graph_node;
@@ -99,6 +109,12 @@ graph_nodes_populate(struct graph *_graph)
                                                     ->adjacency_list[count]
                                                     ->node->name[0];

+               if (graph_node->node->errs != NULL) {
+                       node->err_off = err_off - off;
+                       err_off += sizeof(uint64_t) * 
graph_node->node->errs->nb_errors;
+                       err_off = RTE_ALIGN(err_off, RTE_CACHE_LINE_SIZE);
+               }
+
                off += sizeof(struct rte_node *) * nb_edges;
                off = RTE_ALIGN(off, RTE_CACHE_LINE_SIZE);
                node->next = off;
@@ -158,7 +174,7 @@ graph_node_nexts_populate(struct graph *_graph)
 }

 static int
-graph_src_nodes_populate(struct graph *_graph)
+graph_src_nodes_offset_populate(struct graph *_graph)
 {
        struct rte_graph *graph = _graph->graph;
        struct graph_node *graph_node;
@@ -193,7 +209,7 @@ graph_fp_mem_populate(struct graph *graph)
                graph_pcap_init(graph);
        graph_nodes_populate(graph);
        rc = graph_node_nexts_populate(graph);
-       rc |= graph_src_nodes_populate(graph);
+       rc |= graph_src_nodes_offset_populate(graph);

        return rc;
 }
diff --git a/lib/graph/graph_private.h b/lib/graph/graph_private.h
index e663b04d8b..01921b254c 100644
--- a/lib/graph/graph_private.h
+++ b/lib/graph/graph_private.h
@@ -103,6 +103,8 @@ struct graph {
        /**< Memzone to store graph data. */
        rte_graph_off_t nodes_start;
        /**< Node memory start offset in graph reel. */
+       rte_graph_off_t errors_start;
+       /**< Node error memory start offset in graph reel. */
        rte_node_t src_node_count;
        /**< Number of source nodes in a graph. */
        struct rte_graph *graph;
diff --git a/lib/graph/rte_graph_worker_common.h 
b/lib/graph/rte_graph_worker_common.h
index 36d864e2c1..fa59d40f57 100644
--- a/lib/graph/rte_graph_worker_common.h
+++ b/lib/graph/rte_graph_worker_common.h
@@ -110,6 +110,7 @@ struct __rte_cache_aligned rte_node {
                        uint64_t total_sched_fail; /**< Number of scheduled 
failure. */
                } dispatch;
        };
+       rte_graph_off_t err_off; /**< Offset to error counters. */
        /* Fast path area  */
 #define RTE_NODE_CTX_SZ 16
        alignas(RTE_CACHE_LINE_SIZE) uint8_t ctx[RTE_NODE_CTX_SZ]; /**< Node 
Context. */
--
2.25.1