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Annotation of embedaddon/quagga/tests/heavy.c, revision 1.1

1.1     ! misho       1: /*
        !             2:  * $Id: heavy.c,v 1.3 2005/04/25 16:42:24 paul Exp $
        !             3:  *
        !             4:  * This file is part of Quagga.
        !             5:  *
        !             6:  * Quagga is free software; you can redistribute it and/or modify it
        !             7:  * under the terms of the GNU General Public License as published by the
        !             8:  * Free Software Foundation; either version 2, or (at your option) any
        !             9:  * later version.
        !            10:  *
        !            11:  * Quagga is distributed in the hope that it will be useful, but
        !            12:  * WITHOUT ANY WARRANTY; without even the implied warranty of
        !            13:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
        !            14:  * General Public License for more details.
        !            15:  *
        !            16:  * You should have received a copy of the GNU General Public License
        !            17:  * along with Quagga; see the file COPYING.  If not, write to the Free
        !            18:  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
        !            19:  * 02111-1307, USA.
        !            20:  */
        !            21: 
        !            22: /* This programme shows the effects of 'heavy' long-running functions
        !            23:  * on the cooperative threading model.
        !            24:  *
        !            25:  * Run it with a config file containing 'password whatever', telnet to it
        !            26:  * (it defaults to port 4000) and enter the 'clear foo string' command.
        !            27:  * then type whatever and observe that the vty interface is unresponsive
        !            28:  * for quite a period of time, due to the clear_something command
        !            29:  * taking a very long time to complete.
        !            30:  */
        !            31: #include <zebra.h>
        !            32: 
        !            33: #include "thread.h"
        !            34: #include "vty.h"
        !            35: #include "command.h"
        !            36: #include "memory.h"
        !            37: #include <math.h>
        !            38: 
        !            39: enum
        !            40: {
        !            41:   ITERS_FIRST = 0,
        !            42:   ITERS_ERR = 100,
        !            43:   ITERS_LATER = 400,
        !            44:   ITERS_PRINT = 10,
        !            45:   ITERS_MAX = 1000,
        !            46: };
        !            47: 
        !            48: static void
        !            49: slow_func (struct vty *vty, const char *str, const int i)
        !            50: {
        !            51:   double x = 1;
        !            52:   int j;
        !            53:   
        !            54:   for (j = 0; j < 300; j++)
        !            55:     x += sin(x)*j;
        !            56:   
        !            57:   if ((i % ITERS_LATER) == 0)
        !            58:     printf ("%s: %d, temporary error, save this somehow and do it later..\n", 
        !            59:             __func__, i);
        !            60:   
        !            61:   if ((i % ITERS_ERR) == 0)
        !            62:     printf ("%s: hard error\n", __func__);
        !            63:   
        !            64:   if ((i % ITERS_PRINT) == 0)
        !            65:     printf ("%s did %d, x = %g%s", str, i, x, VTY_NEWLINE);  
        !            66: }
        !            67: 
        !            68: static void
        !            69: clear_something (struct vty *vty, const char *str)
        !            70: {
        !            71:   int i;
        !            72:   
        !            73:   /* this could be like iterating through 150k of route_table 
        !            74:    * or worse, iterating through a list of peers, to bgp_stop them with
        !            75:    * each having 150k route tables to process...
        !            76:    */
        !            77:   for (i = ITERS_FIRST; i < ITERS_MAX; i++)
        !            78:     slow_func (vty, str, i);
        !            79: }
        !            80: 
        !            81: DEFUN (clear_foo,
        !            82:        clear_foo_cmd,
        !            83:        "clear foo .LINE",
        !            84:        "clear command\n"
        !            85:        "arbitrary string\n")
        !            86: {
        !            87:   char *str;
        !            88:   if (!argc)
        !            89:     {
        !            90:       vty_out (vty, "%% string argument required%s", VTY_NEWLINE);
        !            91:       return CMD_WARNING;
        !            92:     }
        !            93:   
        !            94:   str = argv_concat (argv, argc, 0);
        !            95:   
        !            96:   clear_something (vty, str);
        !            97:   XFREE (MTYPE_TMP, str);
        !            98:   return CMD_SUCCESS;
        !            99: }
        !           100: 
        !           101: static void
        !           102: slow_vty_init()
        !           103: {
        !           104:   install_element (VIEW_NODE, &clear_foo_cmd);
        !           105: }
        !           106: 
        !           107: void
        !           108: test_init()
        !           109: {
        !           110:   slow_vty_init();
        !           111: }