2004-05-19 Paul Jakma <paul@dishone.st>
* heavy.c: test programme to show how long-running functions
kill responsiveness. Demonstrating the most niggly problem
left in bgpd.
diff --git a/tests/ChangeLog b/tests/ChangeLog
index 93be155..d3dd34d 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,9 @@
+2004-05-19 Paul Jakma <paul@dishone.st>
+
+ * heavy.c: test programme to show how long-running functions
+ kill responsiveness. Demonstrating the most niggly problem
+ left in bgpd.
+
2004-05-13 Paul Jakma <paul@dishone.st>
* test-buffer.c: Andrew's buffer tester
diff --git a/tests/heavy.c b/tests/heavy.c
new file mode 100644
index 0000000..92ec65a
--- /dev/null
+++ b/tests/heavy.c
@@ -0,0 +1,225 @@
+/*
+ * $Id: heavy.c,v 1.1 2005/04/19 21:28:36 paul Exp $
+ *
+ * This file is part of Quagga.
+ *
+ * Quagga is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * Quagga is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Quagga; see the file COPYING. If not, write to the Free
+ * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
+ * 02111-1307, USA.
+ */
+
+/* This programme shows the effects of 'heavy' long-running functions
+ * on the cooperative threading model.
+ *
+ * Run it with a config file containing 'password whatever', telnet to it
+ * (it defaults to port 4000) and enter the 'clear foo string' command.
+ * then type whatever and observe that the vty interface is unresponsive
+ * for quite a period of time, due to the clear_something command
+ * taking a very long time to complete.
+ */
+#include <zebra.h>
+
+#include <lib/version.h>
+#include "getopt.h"
+#include "thread.h"
+#include "vty.h"
+#include "command.h"
+#include "memory.h"
+
+struct thread_master *master;
+
+struct option longopts[] =
+{
+ { "daemon", no_argument, NULL, 'd'},
+ { "config_file", required_argument, NULL, 'f'},
+ { "help", no_argument, NULL, 'h'},
+ { "vty_addr", required_argument, NULL, 'A'},
+ { "vty_port", required_argument, NULL, 'P'},
+ { "version", no_argument, NULL, 'v'},
+ { 0 }
+};
+
+enum
+{
+ ITERS_FIRST = 0,
+ ITERS_PRINT = 10,
+ ITERS_MAX = 1000,
+};
+
+static void
+slow_func (struct vty *vty, char *str, int i)
+{
+ usleep (10000);
+ if ((i % ITERS_PRINT) == 0)
+ printf ("%s did %d%s", str, i, VTY_NEWLINE);
+}
+
+static void
+clear_something (struct vty *vty, char *str)
+{
+ int i;
+
+ /* this could be like iterating through 150k of route_table
+ * or worse, iterating through a list of peers, each with 150k routes...
+ */
+ for (i = ITERS_FIRST; i < ITERS_MAX; i++)
+ slow_func (vty, str, i);
+
+ XFREE (MTYPE_TMP, str);
+}
+
+DEFUN (clear_foo,
+ clear_foo_cmd,
+ "clear foo .LINE",
+ "clear command\n"
+ "arbitrary string\n")
+{
+ char *str;
+ if (!argc)
+ {
+ vty_out (vty, "%% string argument required%s", VTY_NEWLINE);
+ return CMD_WARNING;
+ }
+
+ str = argv_concat (argv, argc, 0);
+
+ clear_something (vty, str);
+ return CMD_SUCCESS;
+}
+
+static void
+slow_vty_init()
+{
+ install_element (VIEW_NODE, &clear_foo_cmd);
+}
+
+/* Help information display. */
+static void
+usage (char *progname, int status)
+{
+ if (status != 0)
+ fprintf (stderr, "Try `%s --help' for more information.\n", progname);
+ else
+ {
+ printf ("Usage : %s [OPTION...]\n\
+Daemon which does 'slow' things.\n\n\
+-d, --daemon Runs in daemon mode\n\
+-f, --config_file Set configuration file name\n\
+-A, --vty_addr Set vty's bind address\n\
+-P, --vty_port Set vty's port number\n\
+-v, --version Print program version\n\
+-h, --help Display this help and exit\n\
+\n\
+Report bugs to %s\n", progname, ZEBRA_BUG_ADDRESS);
+ }
+ exit (status);
+}
+
+
+/* main routine. */
+int
+main (int argc, char **argv)
+{
+ char *p;
+ char *vty_addr = NULL;
+ int vty_port = 4000;
+ int daemon_mode = 0;
+ char *progname;
+ struct thread thread;
+ char *config_file = NULL;
+
+ /* Set umask before anything for security */
+ umask (0027);
+
+ /* get program name */
+ progname = ((p = strrchr (argv[0], '/')) ? ++p : argv[0]);
+
+ /* master init. */
+ master = thread_master_create ();
+
+ while (1)
+ {
+ int opt;
+
+ opt = getopt_long (argc, argv, "dhf:A:P:v", longopts, 0);
+
+ if (opt == EOF)
+ break;
+
+ switch (opt)
+ {
+ case 0:
+ break;
+ case 'f':
+ config_file = optarg;
+ break;
+ case 'd':
+ daemon_mode = 1;
+ break;
+ case 'A':
+ vty_addr = optarg;
+ break;
+ case 'P':
+ /* Deal with atoi() returning 0 on failure */
+ if (strcmp(optarg, "0") == 0)
+ {
+ vty_port = 0;
+ break;
+ }
+ vty_port = atoi (optarg);
+ vty_port = (vty_port ? vty_port : 4000);
+ break;
+ case 'v':
+ print_version (progname);
+ exit (0);
+ break;
+ case 'h':
+ usage (progname, 0);
+ break;
+ default:
+ usage (progname, 1);
+ break;
+ }
+ }
+
+ /* Library inits. */
+ cmd_init (1);
+ vty_init (master);
+ memory_init ();
+
+ /* OSPF vty inits. */
+ slow_vty_init ();
+
+ sort_node ();
+
+ /* Change to the daemon program. */
+ if (daemon_mode)
+ daemon (0, 0);
+
+ /* Create VTY socket */
+ vty_serv_sock (vty_addr, vty_port, "/tmp/.heavy.sock");
+
+ /* Configuration file read*/
+ if (!config_file)
+ usage (progname, 1);
+ vty_read_config (config_file, NULL);
+
+ /* Fetch next active thread. */
+ while (thread_fetch (master, &thread))
+ thread_call (&thread);
+
+ /* Not reached. */
+ exit (0);
+}
+