annotate src/event/ngx_event_timer.h @ 5115:a29c574d61fa

Status: introduced the "ngx_stat_waiting" counter. And corresponding variable $connections_waiting was added. Previously, waiting connections were counted as the difference between active connections and the sum of reading and writing connections. That made it impossible to count more than one request in one connection as reading or writing (as is the case for SPDY). Also, we no longer count connections in handshake state as waiting.
author Valentin Bartenev <vbart@nginx.com>
date Fri, 15 Mar 2013 20:00:49 +0000
parents d620f497c50f
children 1f513d7f1b45
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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2 /*
444
42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
4412
d620f497c50f Copyright updated.
Maxim Konovalov <maxim@nginx.com>
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4 * Copyright (C) Nginx, Inc.
441
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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5 */
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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6
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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7
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b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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parents:
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8 #ifndef _NGX_EVENT_TIMER_H_INCLUDED_
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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parents:
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9 #define _NGX_EVENT_TIMER_H_INCLUDED_
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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10
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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11
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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12 #include <ngx_config.h>
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6dfda4cf5200 nginx-0.0.1-2003-06-11-19:28:34 import
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13 #include <ngx_core.h>
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14 #include <ngx_event.h>
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15
b288069a8696 nginx-0.0.1-2003-01-23-21:47:54 import
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16
501
d4ea69372b94 nginx-0.1.25-RELEASE import
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17 #define NGX_TIMER_INFINITE (ngx_msec_t) -1
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7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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18
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19 #define NGX_TIMER_LAZY_DELAY 300
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20
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21
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22 ngx_int_t ngx_event_timer_init(ngx_log_t *log);
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9aa426375256 nginx-0.0.1-2003-12-05-10:11:46 import
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23 ngx_msec_t ngx_event_find_timer(void);
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24 void ngx_event_expire_timers(void);
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26
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27 #if (NGX_THREADS)
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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28 extern ngx_mutex_t *ngx_event_timer_mutex;
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29 #endif
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31
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32 extern ngx_thread_volatile ngx_rbtree_t ngx_event_timer_rbtree;
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33
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34
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35 static ngx_inline void
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36 ngx_event_del_timer(ngx_event_t *ev)
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37 {
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38 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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39 "event timer del: %d: %M",
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40 ngx_event_ident(ev->data), ev->timer.key);
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41
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42 ngx_mutex_lock(ngx_event_timer_mutex);
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43
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44 ngx_rbtree_delete(&ngx_event_timer_rbtree, &ev->timer);
205
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45
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7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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46 ngx_mutex_unlock(ngx_event_timer_mutex);
7bb9562216ce nginx-0.0.2-2004-02-25-23:16:15 import
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47
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48 #if (NGX_DEBUG)
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49 ev->timer.left = NULL;
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50 ev->timer.right = NULL;
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51 ev->timer.parent = NULL;
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52 #endif
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53
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54 ev->timer_set = 0;
4a9a2b1dd6fa nginx-0.0.1-2003-12-04-17:53:00 import
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55 }
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57
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58 static ngx_inline void
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59 ngx_event_add_timer(ngx_event_t *ev, ngx_msec_t timer)
205
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60 {
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61 ngx_msec_t key;
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62 ngx_msec_int_t diff;
205
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63
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64 key = ngx_current_msec + timer;
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65
303
00c5660d2707 nginx-0.0.3-2004-04-01-20:20:53 import
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66 if (ev->timer_set) {
304
bcbe876f4262 nginx-0.0.3-2004-04-02-09:14:40 import
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67
bcbe876f4262 nginx-0.0.3-2004-04-02-09:14:40 import
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68 /*
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69 * Use a previous timer value if difference between it and a new
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70 * value is less than NGX_TIMER_LAZY_DELAY milliseconds: this allows
1739becf3f83 fix comment
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71 * to minimize the rbtree operations for fast connections.
304
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72 */
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73
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74 diff = (ngx_msec_int_t) (key - ev->timer.key);
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75
ecd9c160f25b nginx-0.3.0-RELEASE import
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76 if (ngx_abs(diff) < NGX_TIMER_LAZY_DELAY) {
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77 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
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78 "event timer: %d, old: %M, new: %M",
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79 ngx_event_ident(ev->data), ev->timer.key, key);
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80 return;
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81 }
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82
00c5660d2707 nginx-0.0.3-2004-04-01-20:20:53 import
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83 ngx_del_timer(ev);
00c5660d2707 nginx-0.0.3-2004-04-01-20:20:53 import
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84 }
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85
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86 ev->timer.key = key;
303
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87
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88 ngx_log_debug3(NGX_LOG_DEBUG_EVENT, ev->log, 0,
ecd9c160f25b nginx-0.3.0-RELEASE import
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89 "event timer add: %d: %M:%M",
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90 ngx_event_ident(ev->data), timer, ev->timer.key);
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91
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9c2f3ed7a247 nginx-0.3.3-RELEASE import
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92 ngx_mutex_lock(ngx_event_timer_mutex);
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93
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94 ngx_rbtree_insert(&ngx_event_timer_rbtree, &ev->timer);
205
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95
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96 ngx_mutex_unlock(ngx_event_timer_mutex);
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97
205
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98 ev->timer_set = 1;
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99 }
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100
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101
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e8cdc2989cee nginx-0.0.1-2003-02-06-20:21:13 import
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102 #endif /* _NGX_EVENT_TIMER_H_INCLUDED_ */