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43313d05 | 1 | /* |
9f3f7a11 | 2 | * $Id: heavy.c,v 1.3 2005/04/25 16:42:24 paul Exp $ |
43313d05 | 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 | ||
43313d05 | 33 | #include "thread.h" |
34 | #include "vty.h" | |
35 | #include "command.h" | |
36 | #include "memory.h" | |
f4d062f8 | 37 | #include <math.h> |
43313d05 | 38 | |
43313d05 | 39 | enum |
40 | { | |
41 | ITERS_FIRST = 0, | |
f4d062f8 | 42 | ITERS_ERR = 100, |
43 | ITERS_LATER = 400, | |
43313d05 | 44 | ITERS_PRINT = 10, |
45 | ITERS_MAX = 1000, | |
46 | }; | |
47 | ||
48 | static void | |
f4d062f8 | 49 | slow_func (struct vty *vty, const char *str, const int i) |
43313d05 | 50 | { |
f4d062f8 | 51 | double x = 1; |
52 | int j; | |
53 | ||
9f3f7a11 | 54 | for (j = 0; j < 300; j++) |
f4d062f8 | 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 | ||
43313d05 | 64 | if ((i % ITERS_PRINT) == 0) |
f4d062f8 | 65 | printf ("%s did %d, x = %g%s", str, i, x, VTY_NEWLINE); |
43313d05 | 66 | } |
67 | ||
68 | static void | |
f4d062f8 | 69 | clear_something (struct vty *vty, const char *str) |
43313d05 | 70 | { |
71 | int i; | |
72 | ||
73 | /* this could be like iterating through 150k of route_table | |
f4d062f8 | 74 | * or worse, iterating through a list of peers, to bgp_stop them with |
75 | * each having 150k route tables to process... | |
43313d05 | 76 | */ |
77 | for (i = ITERS_FIRST; i < ITERS_MAX; i++) | |
78 | slow_func (vty, str, i); | |
f4d062f8 | 79 | } |
80 | ||
43313d05 | 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); | |
f4d062f8 | 97 | XFREE (MTYPE_TMP, str); |
43313d05 | 98 | return CMD_SUCCESS; |
99 | } | |
100 | ||
101 | static void | |
102 | slow_vty_init() | |
103 | { | |
f4d062f8 | 104 | install_element (VIEW_NODE, &clear_foo_cmd); |
43313d05 | 105 | } |
106 | ||
9f3f7a11 | 107 | void |
108 | test_init() | |
43313d05 | 109 | { |
9f3f7a11 | 110 | slow_vty_init(); |
43313d05 | 111 | } |