forked from osmocom/wireshark
131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
/* timestats.c
|
|
* routines for time statistics
|
|
* Copyrigth 2003 Lars Roland
|
|
*
|
|
* $Id$
|
|
*
|
|
* Ethereal - Network traffic analyzer
|
|
* By Gerald Combs <gerald@ethereal.com>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* 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 2
|
|
* of the License, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "timestats.h"
|
|
|
|
/*
|
|
* function: get_timedelta
|
|
* delta = b - a
|
|
*/
|
|
|
|
void get_timedelta(nstime_t *delta, const nstime_t *b, const nstime_t *a )
|
|
{
|
|
delta->secs = b->secs - a->secs;
|
|
delta->nsecs= b->nsecs - a->nsecs;
|
|
if(delta->nsecs<0){
|
|
delta->nsecs+=1000000000;
|
|
delta->secs--;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* function: addtime
|
|
* sum += a
|
|
*/
|
|
|
|
void addtime(nstime_t *sum, const nstime_t *a)
|
|
{
|
|
sum->secs += a->secs;
|
|
sum->nsecs += a->nsecs;
|
|
if(sum->nsecs>1000000000){
|
|
sum->nsecs-=1000000000;
|
|
sum->secs++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* function: nstime_to_msec
|
|
* converts nstime to gdouble, time base is milli seconds
|
|
*/
|
|
|
|
gdouble nstime_to_msec(const nstime_t *time)
|
|
{
|
|
return ((double)time->secs*1000 + (double)time->nsecs/1000000);
|
|
}
|
|
|
|
/* A Function to update a timestat_t struct with a new sample*/
|
|
|
|
void
|
|
time_stat_update(timestat_t *stats, const nstime_t *delta, packet_info *pinfo)
|
|
{
|
|
if(stats->num==0){
|
|
stats->max.secs=delta->secs;
|
|
stats->max.nsecs=delta->nsecs;
|
|
stats->max_num=pinfo->fd->num;
|
|
}
|
|
|
|
if(stats->num==0){
|
|
stats->min.secs=delta->secs;
|
|
stats->min.nsecs=delta->nsecs;
|
|
stats->min_num=pinfo->fd->num;
|
|
}
|
|
|
|
if( (delta->secs<stats->min.secs)
|
|
||( (delta->secs==stats->min.secs)
|
|
&&(delta->nsecs<stats->min.nsecs) ) ){
|
|
stats->min.secs=delta->secs;
|
|
stats->min.nsecs=delta->nsecs;
|
|
stats->min_num=pinfo->fd->num;
|
|
}
|
|
|
|
if( (delta->secs>stats->max.secs)
|
|
||( (delta->secs==stats->max.secs)
|
|
&&(delta->nsecs>stats->max.nsecs) ) ){
|
|
stats->max.secs=delta->secs;
|
|
stats->max.nsecs=delta->nsecs;
|
|
stats->max_num=pinfo->fd->num;
|
|
}
|
|
|
|
stats->tot.secs += delta->secs;
|
|
stats->tot.nsecs += delta->nsecs;
|
|
if(stats->tot.nsecs>1000000000){
|
|
stats->tot.nsecs-=1000000000;
|
|
stats->tot.secs++;
|
|
}
|
|
|
|
stats->num++;
|
|
}
|
|
|
|
/*
|
|
* get_average - function
|
|
*
|
|
* function to calculate the average
|
|
* returns the average as a gdouble , time base is milli seconds
|
|
*/
|
|
|
|
gdouble get_average(const nstime_t *sum, guint32 num)
|
|
{
|
|
gdouble average;
|
|
|
|
if(num > 0) {
|
|
average = (double)sum->secs*1000 + (double)sum->nsecs/1000000;
|
|
average /= num;
|
|
}
|
|
else {
|
|
average = 0;
|
|
}
|
|
return average;
|
|
}
|