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.
35 #include "querycmds.h"
46 struct current_load_st current_load; /**< The current load */
48 static struct current_load_st cspm_sum; /**< Number of connections times number
49 of seconds per minute. */
50 static struct current_load_st csph_sum; /**< Number of connections times number
51 of seconds per hour. */
52 static struct current_load_st cspm[60]; /**< Last 60 minutes */
53 static struct current_load_st csph[72]; /**< Last 72 hours */
55 static int m_index; /**< Next entry to use in #cspm. */
56 static int h_index; /**< Next entry to use in #csph. */
58 /** Update load average to reflect a change in the local client count.
60 void update_load(void)
62 static struct tm tm_now; /* Current time. */
63 static time_t last_sec; /* Seconds of last time that
64 update_load() called. */
65 static time_t last_min;
66 static time_t last; /* Last time that update_load() was called. */
67 static struct current_load_st last_load; /* The load last time that
68 update_load() was called. */
69 static int initialized; /* Boolean, set when initialized. */
70 int diff_time; /* Temp. variable used to hold time intervals
71 in seconds, minutes or hours. */
73 /* Update `current_load' */
74 current_load.client_count = UserStats.local_clients;
75 current_load.conn_count = UserStats.local_clients + UserStats.local_servers;
77 /* Nothing needed when still in the same second */
78 if (!(diff_time = CurrentTime - last))
80 last_load = current_load; /* Update last_load to be the load last
81 time that update_load() was called. */
85 /* If we get here we entered a new second */
88 * Make sure we keep the accurate time in 'tm_now'
90 if ((tm_now.tm_sec += diff_time) > 59)
92 /* This is done once every minute */
93 diff_time = tm_now.tm_sec / 60;
94 tm_now.tm_sec -= 60 * diff_time;
95 if ((tm_now.tm_min += diff_time) > 59)
97 /* This is done once every hour */
98 diff_time = tm_now.tm_min / 60;
99 tm_now.tm_min -= 60 * diff_time;
100 if ((tm_now.tm_hour += diff_time) > 23)
102 tm_now = *localtime(&CurrentTime); /* Only called once a day */
107 last_min = tm_now.tm_min;
112 /* If we get here we entered a new minute */
114 /* Finish the calculation of cspm of the last minute first: */
115 diff_time = 60 - last_sec;
116 cspm_sum.conn_count += last_load.conn_count * diff_time;
117 cspm_sum.client_count += last_load.client_count * diff_time;
118 cspm_sum.local_count += last_load.local_count * diff_time;
120 /* Add the completed minute to the Connections*Seconds/Hour sum */
121 csph_sum.conn_count += cspm_sum.conn_count - cspm[m_index].conn_count;
122 csph_sum.client_count += cspm_sum.client_count - cspm[m_index].client_count;
123 csph_sum.local_count += cspm_sum.local_count - cspm[m_index].local_count;
125 /* Store the completed minute in an array */
126 cspm[m_index] = cspm_sum;
128 /* How long did last_cspm last ? */
129 diff_time = tm_now.tm_min - last_min;
130 last_min = tm_now.tm_min;
133 diff_time += 60; /* update_load() must be called at
134 _least_ once an hour */
136 if (diff_time > 1) /* Did more then one minute pass ? */
138 /* Calculate the constant load during those extra minutes */
139 cspm_sum.conn_count = last_load.conn_count * 60;
140 cspm_sum.client_count = last_load.client_count * 60;
141 cspm_sum.local_count = last_load.local_count * 60;
146 /* Increase minute index */
150 /* Keep a list of the last 72 hours */
151 csph[h_index] = csph_sum;
156 if (--diff_time <= 0) /* '<' to prevent endless loop if update_load()
157 was not called once an hour :/ */
160 /* Add extra minutes to the Connections*Seconds/Hour sum */
161 csph_sum.conn_count += cspm_sum.conn_count - cspm[m_index].conn_count;
162 csph_sum.client_count +=
163 cspm_sum.client_count - cspm[m_index].client_count;
164 csph_sum.local_count += cspm_sum.local_count - cspm[m_index].local_count;
166 /* Store extra minutes in the array */
167 cspm[m_index] = cspm_sum;
170 /* Now start the calculation of the new minute: */
171 last_sec = tm_now.tm_sec;
172 cspm_sum.conn_count = last_load.conn_count * last_sec;
173 cspm_sum.client_count = last_load.client_count * last_sec;
174 cspm_sum.local_count = last_load.local_count * last_sec;
178 /* A new second, but the same minute as last time */
179 /* How long did last_load last ? */
180 diff_time = tm_now.tm_sec - last_sec;
181 last_sec = tm_now.tm_sec;
182 if (diff_time == 1) /* Just one second ? */
184 cspm_sum.conn_count += last_load.conn_count;
185 cspm_sum.client_count += last_load.client_count;
186 cspm_sum.local_count += last_load.local_count;
190 /* More then one second */
191 /* At most 3 integer multiplication per second */
192 cspm_sum.conn_count += last_load.conn_count * diff_time;
193 cspm_sum.client_count += last_load.client_count * diff_time;
194 cspm_sum.local_count += last_load.local_count * diff_time;
197 last_load = current_load; /* Update last_load to be the load last
198 time that update_load() was called. */
202 /** Statistics callback to display userload.
203 * @param[in] sptr Client requesting statistics.
204 * @param[in] sd Stats descriptor for request (ignored).
205 * @param[in] param Extra parameter from user (ignored).
208 calc_load(struct Client *sptr, const struct StatDesc *sd, char *param)
211 static const char *header =
212 /* ----.- ----.- ---- ---- ---- ------------ */
213 "Minute Hour Day Yest. YYest. Userload for:";
215 static const char *what[3] = {
220 int i, j, times[5][3]; /* [min,hour,day,Yest,YYest]
221 [local,client,conn] */
222 int last_m_index = m_index, last_h_index = h_index;
224 update_load(); /* We want stats accurate as of *now* */
226 if (--last_m_index < 0)
228 times[0][0] = (cspm[last_m_index].local_count + 3) / 6;
229 times[0][1] = (cspm[last_m_index].client_count + 3) / 6;
230 times[0][2] = (cspm[last_m_index].conn_count + 3) / 6;
232 times[1][0] = (csph_sum.local_count + 180) / 360;
233 times[1][1] = (csph_sum.client_count + 180) / 360;
234 times[1][2] = (csph_sum.conn_count + 180) / 360;
236 for (i = 2; i < 5; ++i)
241 for (j = 0; j < 24; ++j)
243 if (--last_h_index < 0)
245 times[i][0] += csph[last_h_index].local_count;
246 times[i][1] += csph[last_h_index].client_count;
247 times[i][2] += csph[last_h_index].conn_count;
249 times[i][0] /= 86400;
250 times[i][1] /= 86400;
251 times[i][2] /= 86400;
254 sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :%s", sptr, header);
255 for (i = 0; i < 3; ++i)
256 sendcmdto_one(&me, CMD_NOTICE, sptr,
257 "%C :%4d.%1d %4d.%1d %4d %4d %4d %s", sptr,
258 times[0][i] / 10, times[0][i] % 10,
259 times[1][i] / 10, times[1][i] % 10,
260 times[2][i], times[3][i], times[4][i], what[i]);
263 /** Initialize the userload statistics. */
266 memset(¤t_load, 0, sizeof(current_load));
267 update_load(); /* Initialize the load list */