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From: <jerinj@marvell.com>
To: Jerin Jacob <jerinj@marvell.com>, Kiran Kumar K <kirankumark@marvell.com>
CC: <dev@dpdk.org>, <thomas@monjalon.net>, <david.marchand@redhat.com>,
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Date: Thu, 19 Mar 2020 03:05:34 +0530
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Subject: [dpdk-dev] [PATCH v1 09/26] graph: implement Graphviz export
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From: Jerin Jacob <jerinj@marvell.com>
Adding API implementation support exporting the graph object to file.
This will export the graph to a file in Graphviz format.
It can be viewed in many viewers such as
https://dreampuf.github.io/GraphvizOnline/
Signed-off-by: Jerin Jacob <jerinj@marvell.com>
Signed-off-by: Kiran Kumar K <kirankumark@marvell.com>
Signed-off-by: Pavan Nikhilesh <pbhagavatula@marvell.com>
---
lib/librte_graph/graph.c | 54 ++++++++++++++++++++++++++
lib/librte_graph/rte_graph_version.map | 1 +
2 files changed, 55 insertions(+)
diff --git a/lib/librte_graph/graph.c b/lib/librte_graph/graph.c
index 72a82c2a8..ad58673be 100644
--- a/lib/librte_graph/graph.c
+++ b/lib/librte_graph/graph.c
@@ -475,6 +475,60 @@ __rte_node_stream_alloc(struct rte_graph *graph, struct rte_node *node)
node->realloc_count++;
}
+static int
+graph_to_dot(FILE *f, struct graph *graph)
+{
+ const char *src_edge_color = " [color=blue]\n";
+ const char *edge_color = "\n";
+ struct graph_node *graph_node;
+ char *node_name;
+ rte_edge_t i;
+ int rc;
+
+ rc = fprintf(f, "Digraph %s {\n\trankdir=LR;\n", graph->name);
+ if (rc < 0)
+ goto end;
+
+ STAILQ_FOREACH(graph_node, &graph->node_list, next) {
+ node_name = graph_node->node->name;
+ for (i = 0; i < graph_node->node->nb_edges; i++) {
+ rc = fprintf(f, "\t\"%s\"->\"%s\"%s", node_name,
+ graph_node->adjacency_list[i]->node->name,
+ graph_node->node->flags & RTE_NODE_SOURCE_F
+ ? src_edge_color
+ : edge_color);
+ if (rc < 0)
+ goto end;
+ }
+ }
+ rc = fprintf(f, "}\n");
+ if (rc < 0)
+ goto end;
+
+ return 0;
+end:
+ rte_errno = EBADF;
+ return -rte_errno;
+}
+
+rte_graph_t
+rte_graph_export(const char *name, FILE *f)
+{
+ rte_graph_t rc = RTE_GRAPH_ID_INVALID;
+ struct graph *graph;
+
+ STAILQ_FOREACH(graph, &graph_list, next) {
+ if (strncmp(graph->name, name, RTE_GRAPH_NAMESIZE) == 0) {
+ rc = graph_to_dot(f, graph);
+ goto end;
+ }
+ }
+ rte_errno = ENOENT;
+end:
+ return rc;
+}
+
+
rte_graph_t
rte_graph_max_count(void)
{
diff --git a/lib/librte_graph/rte_graph_version.map b/lib/librte_graph/rte_graph_version.map
index 5a2b13293..2797be044 100644
--- a/lib/librte_graph/rte_graph_version.map
+++ b/lib/librte_graph/rte_graph_version.map
@@ -6,6 +6,7 @@ EXPERIMENTAL {
rte_graph_create;
rte_graph_destroy;
+ rte_graph_export;
rte_graph_from_name;
rte_graph_id_to_name;
rte_graph_lookup;
--
2.25.1