add some warning message for when chan_sip gets overloaded (issue #5530)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@6908 65c4cc65-6c06-0410-ace0-fbb531ad65f3

channels/chan_sip.c

@@ -11199,9 +11199,14 @@ restartsearch:
 		if (fastrestart)
 			res = 1;
 		res = ast_io_wait(io, res);
+		if (res > 20)
+			ast_log(LOG_WARNING, "chan_sip: ast_io_wait ran %d all at once\n", res);
 		ast_mutex_lock(&monlock);
-		if (res >= 0) 
+		if (res >= 0)  {
-			ast_sched_runq(sched);
+			res = ast_sched_runq(sched);
+			if (res >= 20)
+				ast_log(LOG_WARNING, "chan_sip: ast_sched_runq ran %d all at once\n", res);
+		}
 
 		/* needs work to send mwi to realtime peers */
 		time(&t);