/*
* 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.
*
* $Id: userload.c 721 2004-07-06 17:41:00Z sirvulcan $
*/
#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 "ircd_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, h_index; /* Array indexes */
/*
* update_load
*
* A new connection was added or removed.
*/
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;
}
void calc_load(struct Client *sptr, struct StatDesc *sd, int stat, 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]);
}
void initload(void)
{
memset(¤t_load, 0, sizeof(current_load));
update_load(); /* Initialize the load list */
}
syntax highlighted by Code2HTML, v. 0.9.1