Add better stats about queued sends consisten with the list changes

src/connector.c

@@ -102,6 +102,8 @@ struct connector_data {
 
 	int64_t sends_generated;
 	int64_t sends_delayed;
+	int64_t sends_queued;
+	int64_t sends_size;
 
 	/* For protecting the pending sends list */
 	mutex_t sender_lock;
@@ -590,6 +592,7 @@ static void *sender(void *arg)
 	rename_proc("csender");
 
 	while (42) {
+		int64_t sends_queued = 0, sends_size = 0;
 		sender_send_t *sending, *tmp;
 
 		/* Check all sends to see if they can be written out */
@@ -597,11 +600,16 @@ static void *sender(void *arg)
 			if (send_sender_send(ckp, cdata, sending)) {
 				DL_DELETE(sends, sending);
 				clear_sender_send(sending, cdata);
-			} else
-				cdata->sends_delayed++;
+			} else {
+				sends_queued++;
+				sends_size += sizeof(sender_send_t) + sending->len + 1;
+			}
 		}
 
 		mutex_lock(&cdata->sender_lock);
+		cdata->sends_delayed += sends_queued;
+		cdata->sends_queued = sends_queued;
+		cdata->sends_size = sends_size;
 		/* Poll every 10ms if there are no new sends. */
 		if (!cdata->sender_sends) {
 			const ts_t polltime = {0, 10000000};
@@ -751,21 +759,16 @@ static char *connector_stats(cdata_t *cdata)
 	memsize = 0;
 
 	mutex_lock(&cdata->sender_lock);
-	generated = cdata->sends_generated;
 	DL_FOREACH(cdata->sender_sends, send) {
 		objects++;
 		memsize += sizeof(sender_send_t) + send->len + 1;
 	}
-	mutex_unlock(&cdata->sender_lock);
-
-	JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", generated);
+	JSON_CPACK(subval, "{si,si,si}", "count", objects, "memory", memsize, "generated", cdata->sends_generated);
 	json_set_object(val, "sends", subval);
 
-	objects = 0;
-	memsize = 0;
+	JSON_CPACK(subval, "{si,si,si}", "count", cdata->sends_queued, "memory", cdata->sends_size, "generated", cdata->sends_delayed);
+	mutex_unlock(&cdata->sender_lock);
 
-	generated = cdata->sends_delayed;
-	JSON_CPACK(subval, "{si}", "generated", generated);
 	json_set_object(val, "delays", subval);
 
 	buf = json_dumps(val, JSON_NO_UTF8 | JSON_PRESERVE_ORDER);