2 * Userload module by Michael L. VanLoon (mlv) <michaelv@iastate.edu>
3 * Written 2/93. Originally grafted into irc2.7.2g 4/93.
5 * Rewritten 9/97 by Carlo Wood (Run) <carlo@runaway.xs4all.nl>
6 * because previous version used ridiculous amounts of memory
7 * (stored all loads of the passed three days ~ 8 megs).
9 * IRC - Internet Relay Chat, ircd/userload.c
10 * Copyright (C) 1990 University of Oulu, Computing Center
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 1, or (at your option)
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 * @brief Userload tracking and statistics.
37 #include "querycmds.h"
48 struct current_load_st current_load; /**< The current load */
50 static struct current_load_st cspm_sum; /**< Number of connections times number
51 of seconds per minute. */
52 static struct current_load_st csph_sum; /**< Number of connections times number
53 of seconds per hour. */
54 static struct current_load_st cspm[60]; /**< Last 60 minutes */
55 static struct current_load_st csph[72]; /**< Last 72 hours */
57 static int m_index; /**< Next entry to use in #cspm. */
58 static int h_index; /**< Next entry to use in #csph. */
60 /** Update load average to reflect a change in the local client count.
62 void update_load(void)
64 static struct tm tm_now; /* Current time. */
65 static time_t last_sec; /* Seconds of last time that
66 update_load() called. */
67 static time_t last_min;
68 static time_t last; /* Last time that update_load() was called. */
69 static struct current_load_st last_load; /* The load last time that
70 update_load() was called. */
71 static int initialized; /* Boolean, set when initialized. */
72 int diff_time; /* Temp. variable used to hold time intervals
73 in seconds, minutes or hours. */
75 /* Update `current_load' */
76 current_load.client_count = UserStats.local_clients;
77 current_load.conn_count = UserStats.local_clients + UserStats.local_servers;
79 /* Nothing needed when still in the same second */
80 if (!(diff_time = CurrentTime - last))
82 last_load = current_load; /* Update last_load to be the load last
83 time that update_load() was called. */
87 /* If we get here we entered a new second */
90 * Make sure we keep the accurate time in 'tm_now'
92 if ((tm_now.tm_sec += diff_time) > 59)
94 /* This is done once every minute */
95 diff_time = tm_now.tm_sec / 60;
96 tm_now.tm_sec -= 60 * diff_time;
97 if ((tm_now.tm_min += diff_time) > 59)
99 /* This is done once every hour */
100 diff_time = tm_now.tm_min / 60;
101 tm_now.tm_min -= 60 * diff_time;
102 if ((tm_now.tm_hour += diff_time) > 23)
104 tm_now = *localtime(&CurrentTime); /* Only called once a day */
109 last_min = tm_now.tm_min;
114 /* If we get here we entered a new minute */
116 /* Finish the calculation of cspm of the last minute first: */
117 diff_time = 60 - last_sec;
118 cspm_sum.conn_count += last_load.conn_count * diff_time;
119 cspm_sum.client_count += last_load.client_count * diff_time;
120 cspm_sum.local_count += last_load.local_count * diff_time;
122 /* Add the completed minute to the Connections*Seconds/Hour sum */
123 csph_sum.conn_count += cspm_sum.conn_count - cspm[m_index].conn_count;
124 csph_sum.client_count += cspm_sum.client_count - cspm[m_index].client_count;
125 csph_sum.local_count += cspm_sum.local_count - cspm[m_index].local_count;
127 /* Store the completed minute in an array */
128 cspm[m_index] = cspm_sum;
130 /* How long did last_cspm last ? */
131 diff_time = tm_now.tm_min - last_min;
132 last_min = tm_now.tm_min;
135 diff_time += 60; /* update_load() must be called at
136 _least_ once an hour */
138 if (diff_time > 1) /* Did more then one minute pass ? */
140 /* Calculate the constant load during those extra minutes */
141 cspm_sum.conn_count = last_load.conn_count * 60;
142 cspm_sum.client_count = last_load.client_count * 60;
143 cspm_sum.local_count = last_load.local_count * 60;
148 /* Increase minute index */
152 /* Keep a list of the last 72 hours */
153 csph[h_index] = csph_sum;
158 if (--diff_time <= 0) /* '<' to prevent endless loop if update_load()
159 was not called once an hour :/ */
162 /* Add extra minutes to the Connections*Seconds/Hour sum */
163 csph_sum.conn_count += cspm_sum.conn_count - cspm[m_index].conn_count;
164 csph_sum.client_count +=
165 cspm_sum.client_count - cspm[m_index].client_count;
166 csph_sum.local_count += cspm_sum.local_count - cspm[m_index].local_count;
168 /* Store extra minutes in the array */
169 cspm[m_index] = cspm_sum;
172 /* Now start the calculation of the new minute: */
173 last_sec = tm_now.tm_sec;
174 cspm_sum.conn_count = last_load.conn_count * last_sec;
175 cspm_sum.client_count = last_load.client_count * last_sec;
176 cspm_sum.local_count = last_load.local_count * last_sec;
180 /* A new second, but the same minute as last time */
181 /* How long did last_load last ? */
182 diff_time = tm_now.tm_sec - last_sec;
183 last_sec = tm_now.tm_sec;
184 if (diff_time == 1) /* Just one second ? */
186 cspm_sum.conn_count += last_load.conn_count;
187 cspm_sum.client_count += last_load.client_count;
188 cspm_sum.local_count += last_load.local_count;
192 /* More then one second */
193 /* At most 3 integer multiplication per second */
194 cspm_sum.conn_count += last_load.conn_count * diff_time;
195 cspm_sum.client_count += last_load.client_count * diff_time;
196 cspm_sum.local_count += last_load.local_count * diff_time;
199 last_load = current_load; /* Update last_load to be the load last
200 time that update_load() was called. */
204 /** Statistics callback to display userload.
205 * @param[in] sptr Client requesting statistics.
206 * @param[in] sd Stats descriptor for request (ignored).
207 * @param[in] param Extra parameter from user (ignored).
210 calc_load(struct Client *sptr, const struct StatDesc *sd, char *param)
213 static const char *header =
214 /* ----.- ----.- ---- ---- ---- ------------ */
215 "Minute Hour Day Yest. YYest. Userload for:";
217 static const char *what[3] = {
222 int i, j, times[5][3]; /* [min,hour,day,Yest,YYest]
223 [local,client,conn] */
224 int last_m_index = m_index, last_h_index = h_index;
226 update_load(); /* We want stats accurate as of *now* */
228 if (--last_m_index < 0)
230 times[0][0] = (cspm[last_m_index].local_count + 3) / 6;
231 times[0][1] = (cspm[last_m_index].client_count + 3) / 6;
232 times[0][2] = (cspm[last_m_index].conn_count + 3) / 6;
234 times[1][0] = (csph_sum.local_count + 180) / 360;
235 times[1][1] = (csph_sum.client_count + 180) / 360;
236 times[1][2] = (csph_sum.conn_count + 180) / 360;
238 for (i = 2; i < 5; ++i)
243 for (j = 0; j < 24; ++j)
245 if (--last_h_index < 0)
247 times[i][0] += csph[last_h_index].local_count;
248 times[i][1] += csph[last_h_index].client_count;
249 times[i][2] += csph[last_h_index].conn_count;
251 times[i][0] /= 86400;
252 times[i][1] /= 86400;
253 times[i][2] /= 86400;
256 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :%s", sptr, header);
257 for (i = 0; i < 3; ++i)
258 sendcmdto_one(&me, CMD_NOTICE, sptr,
259 "%C :%4d.%1d %4d.%1d %4d %4d %4d %s", sptr,
260 times[0][i] / 10, times[0][i] % 10,
261 times[1][i] / 10, times[1][i] % 10,
262 times[2][i], times[3][i], times[4][i], what[i]);
265 /** Initialize the userload statistics. */
268 memset(¤t_load, 0, sizeof(current_load));
269 update_load(); /* Initialize the load list */