--- /dev/null
+/*
+ * Userload module by Michael L. VanLoon (mlv) <michaelv@iastate.edu>
+ * Written 2/93. Originally grafted into irc2.7.2g 4/93.
+ *
+ * Rewritten 9/97 by Carlo Wood (Run) <carlo@runaway.xs4all.nl>
+ * because previous version used ridiculous amounts of memory
+ * (stored all loads of the passed three days ~ 8 megs).
+ *
+ * IRC - Internet Relay Chat, ircd/userload.c
+ * Copyright (C) 1990 University of Oulu, Computing Center
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 1, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/** @file
+ * @brief Userload tracking and statistics.
+ * @version $Id$
+ */
+#include "config.h"
+
+#include "userload.h"
+#include "client.h"
+#include "ircd.h"
+#include "msg.h"
+#include "numnicks.h"
+#include "querycmds.h"
+#include "s_misc.h"
+#include "s_stats.h"
+#include "send.h"
+#include "struct.h"
+#include "sys.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+struct current_load_st current_load; /**< The current load */
+
+static struct current_load_st cspm_sum; /**< Number of connections times number
+ of seconds per minute. */
+static struct current_load_st csph_sum; /**< Number of connections times number
+ of seconds per hour. */
+static struct current_load_st cspm[60]; /**< Last 60 minutes */
+static struct current_load_st csph[72]; /**< Last 72 hours */
+
+static int m_index; /**< Next entry to use in #cspm. */
+static int h_index; /**< Next entry to use in #csph. */
+
+/** Update load average to reflect a change in the local client count.
+ */
+void update_load(void)
+{
+ static struct tm tm_now; /* Current time. */
+ static time_t last_sec; /* Seconds of last time that
+ update_load() called. */
+ static time_t last_min;
+ static time_t last; /* Last time that update_load() was called. */
+ static struct current_load_st last_load; /* The load last time that
+ update_load() was called. */
+ static int initialized; /* Boolean, set when initialized. */
+ int diff_time; /* Temp. variable used to hold time intervals
+ in seconds, minutes or hours. */
+
+ /* Update `current_load' */
+ current_load.client_count = UserStats.local_clients;
+ current_load.conn_count = UserStats.local_clients + UserStats.local_servers;
+
+ /* Nothing needed when still in the same second */
+ if (!(diff_time = CurrentTime - last))
+ {
+ last_load = current_load; /* Update last_load to be the load last
+ time that update_load() was called. */
+ return;
+ }
+
+ /* If we get here we entered a new second */
+
+ /*
+ * Make sure we keep the accurate time in 'tm_now'
+ */
+ if ((tm_now.tm_sec += diff_time) > 59)
+ {
+ /* This is done once every minute */
+ diff_time = tm_now.tm_sec / 60;
+ tm_now.tm_sec -= 60 * diff_time;
+ if ((tm_now.tm_min += diff_time) > 59)
+ {
+ /* This is done once every hour */
+ diff_time = tm_now.tm_min / 60;
+ tm_now.tm_min -= 60 * diff_time;
+ if ((tm_now.tm_hour += diff_time) > 23)
+ {
+ tm_now = *localtime(&CurrentTime); /* Only called once a day */
+ if (!initialized)
+ {
+ initialized = 1;
+ last_sec = 60;
+ last_min = tm_now.tm_min;
+ }
+ }
+ }
+
+ /* If we get here we entered a new minute */
+
+ /* Finish the calculation of cspm of the last minute first: */
+ diff_time = 60 - last_sec;
+ cspm_sum.conn_count += last_load.conn_count * diff_time;
+ cspm_sum.client_count += last_load.client_count * diff_time;
+ cspm_sum.local_count += last_load.local_count * diff_time;
+
+ /* Add the completed minute to the Connections*Seconds/Hour sum */
+ csph_sum.conn_count += cspm_sum.conn_count - cspm[m_index].conn_count;
+ csph_sum.client_count += cspm_sum.client_count - cspm[m_index].client_count;
+ csph_sum.local_count += cspm_sum.local_count - cspm[m_index].local_count;
+
+ /* Store the completed minute in an array */
+ cspm[m_index] = cspm_sum;
+
+ /* How long did last_cspm last ? */
+ diff_time = tm_now.tm_min - last_min;
+ last_min = tm_now.tm_min;
+
+ if (diff_time < 0)
+ diff_time += 60; /* update_load() must be called at
+ _least_ once an hour */
+
+ if (diff_time > 1) /* Did more then one minute pass ? */
+ {
+ /* Calculate the constant load during those extra minutes */
+ cspm_sum.conn_count = last_load.conn_count * 60;
+ cspm_sum.client_count = last_load.client_count * 60;
+ cspm_sum.local_count = last_load.local_count * 60;
+ }
+
+ for (;;)
+ {
+ /* Increase minute index */
+ if (++m_index == 60)
+ {
+ m_index = 0;
+ /* Keep a list of the last 72 hours */
+ csph[h_index] = csph_sum;
+ if (++h_index == 72)
+ h_index = 0;
+ }
+
+ if (--diff_time <= 0) /* '<' to prevent endless loop if update_load()
+ was not called once an hour :/ */
+ break;
+
+ /* Add extra minutes to the Connections*Seconds/Hour sum */
+ csph_sum.conn_count += cspm_sum.conn_count - cspm[m_index].conn_count;
+ csph_sum.client_count +=
+ cspm_sum.client_count - cspm[m_index].client_count;
+ csph_sum.local_count += cspm_sum.local_count - cspm[m_index].local_count;
+
+ /* Store extra minutes in the array */
+ cspm[m_index] = cspm_sum;
+ }
+
+ /* Now start the calculation of the new minute: */
+ last_sec = tm_now.tm_sec;
+ cspm_sum.conn_count = last_load.conn_count * last_sec;
+ cspm_sum.client_count = last_load.client_count * last_sec;
+ cspm_sum.local_count = last_load.local_count * last_sec;
+ }
+ else
+ {
+ /* A new second, but the same minute as last time */
+ /* How long did last_load last ? */
+ diff_time = tm_now.tm_sec - last_sec;
+ last_sec = tm_now.tm_sec;
+ if (diff_time == 1) /* Just one second ? */
+ {
+ cspm_sum.conn_count += last_load.conn_count;
+ cspm_sum.client_count += last_load.client_count;
+ cspm_sum.local_count += last_load.local_count;
+ }
+ else
+ {
+ /* More then one second */
+ /* At most 3 integer multiplication per second */
+ cspm_sum.conn_count += last_load.conn_count * diff_time;
+ cspm_sum.client_count += last_load.client_count * diff_time;
+ cspm_sum.local_count += last_load.local_count * diff_time;
+ }
+ }
+ last_load = current_load; /* Update last_load to be the load last
+ time that update_load() was called. */
+ last = CurrentTime;
+}
+
+/** Statistics callback to display userload.
+ * @param[in] sptr Client requesting statistics.
+ * @param[in] sd Stats descriptor for request (ignored).
+ * @param[in] param Extra parameter from user (ignored).
+ */
+void
+calc_load(struct Client *sptr, const struct StatDesc *sd, char *param)
+{
+ /* *INDENT-OFF* */
+ static const char *header =
+ /* ----.- ----.- ---- ---- ---- ------------ */
+ "Minute Hour Day Yest. YYest. Userload for:";
+ /* *INDENT-ON* */
+ static const char *what[3] = {
+ "local clients",
+ "total clients",
+ "total connections"
+ };
+ int i, j, times[5][3]; /* [min,hour,day,Yest,YYest]
+ [local,client,conn] */
+ int last_m_index = m_index, last_h_index = h_index;
+
+ update_load(); /* We want stats accurate as of *now* */
+
+ if (--last_m_index < 0)
+ last_m_index = 59;
+ times[0][0] = (cspm[last_m_index].local_count + 3) / 6;
+ times[0][1] = (cspm[last_m_index].client_count + 3) / 6;
+ times[0][2] = (cspm[last_m_index].conn_count + 3) / 6;
+
+ times[1][0] = (csph_sum.local_count + 180) / 360;
+ times[1][1] = (csph_sum.client_count + 180) / 360;
+ times[1][2] = (csph_sum.conn_count + 180) / 360;
+
+ for (i = 2; i < 5; ++i)
+ {
+ times[i][0] = 43200;
+ times[i][1] = 43200;
+ times[i][2] = 43200;
+ for (j = 0; j < 24; ++j)
+ {
+ if (--last_h_index < 0)
+ last_h_index = 71;
+ times[i][0] += csph[last_h_index].local_count;
+ times[i][1] += csph[last_h_index].client_count;
+ times[i][2] += csph[last_h_index].conn_count;
+ }
+ times[i][0] /= 86400;
+ times[i][1] /= 86400;
+ times[i][2] /= 86400;
+ }
+
+ sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :%s", sptr, header);
+ for (i = 0; i < 3; ++i)
+ sendcmdto_one(&me, CMD_NOTICE, sptr,
+ "%C :%4d.%1d %4d.%1d %4d %4d %4d %s", sptr,
+ times[0][i] / 10, times[0][i] % 10,
+ times[1][i] / 10, times[1][i] % 10,
+ times[2][i], times[3][i], times[4][i], what[i]);
+}
+
+/** Initialize the userload statistics. */
+void initload(void)
+{
+ memset(¤t_load, 0, sizeof(current_load));
+ update_load(); /* Initialize the load list */
+}
projects / ircu2.10.12-pk.git / blobdiff