tests/qtest/qos-test: dump qos graph if verbose

If qtests were run in verbose mode (i.e. if --verbose CL argument was
provided) then dump the generated qos graph (all nodes and edges,
along with their current individual availability status) to stdout,
which allows to identify problems in the created qos graph e.g. when
writing new qos tests.

See API doc comment on function qos_dump_graph() for details.

Signed-off-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <6bffb6e38589fb2c06a2c1b5deed33f3e710fed1.1611704181.git.qemu_oss@crudebyte.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 45 insertions, 0 deletions

diff --git a/tests/qtest/libqos/qgraph.c b/tests/qtest/libqos/qgraph.c
index 61faf6b27d..b3b1a31f81 100644
--- a/tests/qtest/libqos/qgraph.c
+++ b/tests/qtest/libqos/qgraph.c
@@ -805,3 +805,48 @@ void qos_delete_cmd_line(const char *name)
         node->command_line = NULL;
     }
 }
+
+void qos_dump_graph(void)
+{
+    GList *keys;
+    GList *l;
+    QOSGraphEdgeList *list;
+    QOSGraphEdge *e, *next;
+    QOSGraphNode *dest_node, *node;
+
+    qos_printf("ALL QGRAPH EDGES: {\n");
+    keys = g_hash_table_get_keys(edge_table);
+    for (l = keys; l != NULL; l = l->next) {
+        const gchar *key = l->data;
+        qos_printf("\t src='%s'\n", key);
+        list = get_edgelist(key);
+        QSLIST_FOREACH_SAFE(e, list, edge_list, next) {
+            dest_node = g_hash_table_lookup(node_table, e->dest);
+            qos_printf("\t\t|-> dest='%s' type=%d (node=%p)",
+                       e->dest, e->type, dest_node);
+            if (!dest_node) {
+                qos_printf_literal(" <------- ERROR !");
+            }
+            qos_printf_literal("\n");
+        }
+    }
+    g_list_free(keys);
+    qos_printf("}\n");
+
+    qos_printf("ALL QGRAPH NODES: {\n");
+    keys = g_hash_table_get_keys(node_table);
+    for (l = keys; l != NULL; l = l->next) {
+        const gchar *key = l->data;
+        node = g_hash_table_lookup(node_table, key);
+        qos_printf("\t name='%s' ", key);
+        if (node->qemu_name) {
+            qos_printf_literal("qemu_name='%s' ", node->qemu_name);
+        }
+        qos_printf_literal("type=%d cmd_line='%s' [%s]\n",
+                           node->type, node->command_line,
+                           node->available ? "available" : "UNAVAILBLE"
+        );
+    }
+    g_list_free(keys);
+    qos_printf("}\n");
+}