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// ------------------------------------------------------------------------
// kvu_procedure_timer.cpp: Procedure timer. Meant for timing and gathering
// statistics of repeating events.
// Copyright (C) 2000,2004,2012 Kai Vehmanen
//
// 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 <cmath>
#include <math.h> /* floor() */
#include "kvu_numtostr.h"
#include "kvu_procedure_timer.h"
#include <cstring>
PROCEDURE_TIMER::PROCEDURE_TIMER(int id) {
reset();
idstr_rep = "Timer-" + kvu_numtostr(id);
}
PROCEDURE_TIMER::~PROCEDURE_TIMER(void) {
}
bool PROCEDURE_TIMER::less_than(const struct timespec *i,
const struct timespec *ii) const
{
bool result = false;
if (i->tv_sec < ii->tv_sec)
result = true;
if (i->tv_sec == ii->tv_sec) {
result = false;
if (i->tv_nsec < ii->tv_nsec)
result = true;
}
return result;
}
void PROCEDURE_TIMER::subtract(struct timespec *i,
const struct timespec *ii) const
{
i->tv_nsec -= ii->tv_nsec;
if (i->tv_nsec < 0) {
i->tv_nsec += 1000000000;
i->tv_sec -= 1;
}
i->tv_sec -= ii->tv_sec;
}
double PROCEDURE_TIMER::to_seconds(const struct timeval *i) const {
return(i->tv_sec + static_cast<double>(i->tv_usec) / 1000000.0);
}
double PROCEDURE_TIMER::to_seconds(const struct timespec *i) const {
return(i->tv_sec + static_cast<double>(i->tv_nsec) / 1000000000.0);
}
void PROCEDURE_TIMER::set_upper_bound(const struct timeval *p) {
upper_bound_rep.tv_sec = p->tv_sec;
upper_bound_rep.tv_nsec = p->tv_usec * 1000;
}
void PROCEDURE_TIMER::set_upper_bound_seconds(double secs) {
struct timeval buf;
buf.tv_sec = static_cast<time_t>(floor(secs));
buf.tv_usec = static_cast<time_t>(1000000.0f * (secs - static_cast<double>(buf.tv_sec)));
set_upper_bound(&buf);
}
void PROCEDURE_TIMER::set_lower_bound(const struct timeval *p) {
lower_bound_rep.tv_sec = p->tv_sec;
lower_bound_rep.tv_nsec = p->tv_usec * 1000;
}
void PROCEDURE_TIMER::set_lower_bound_seconds(double secs) {
struct timeval buf;
buf.tv_sec = static_cast<time_t>(floor(secs));
buf.tv_usec = static_cast<time_t>(1000000.0f * (secs - static_cast<double>(buf.tv_sec)));
set_lower_bound(&buf);
}
static void priv_gettime(struct timespec *dst)
{
#if HAVE_CLOCK_GETTIME
#if defined CLOCK_MONOTONIC
clock_gettime(CLOCK_MONOTONIC, dst);
#else
clock_gettime(CLOCK_REALTIME, dst);
#endif
#else
struct timeval tmp;
gettimeofday(&tmp, 0);
dst->tv_sec = tmp.tv_sec;
dst->tv_nsec = tmp.tv_usec * 1000;
#endif
}
void PROCEDURE_TIMER::start(void)
{
priv_gettime(&start_rep);
}
void PROCEDURE_TIMER::stop(void)
{
priv_gettime(&now_rep);
stop_helper();
}
/**
* Do heavy operations in a non-inlined helper
* functions for stop().
*
* This is especially useful for the inlined stop()
* variant.
*/
void PROCEDURE_TIMER::stop_helper(void)
{
subtract(&now_rep, &start_rep);
last_duration_rep = to_seconds(&now_rep);
// cerr << idstr_rep << ": " << kvu_numtostr(length, 16) << " secs." << endl;
events_rep++;
event_time_total_rep += last_duration_rep;
if (events_rep == 1)
memcpy(&min_event_rep, &now_rep, sizeof(struct timeval));
if (less_than(&now_rep, &min_event_rep))
memcpy(&min_event_rep, &now_rep, sizeof(struct timeval));
if (less_than(&max_event_rep, &now_rep))
memcpy(&max_event_rep, &now_rep, sizeof(struct timeval));
if (less_than(&now_rep, &lower_bound_rep))
events_under_bound_rep++;
if (less_than(&upper_bound_rep, &now_rep))
events_over_bound_rep++;
}
void PROCEDURE_TIMER::reset(void) {
events_over_bound_rep = 0;
events_under_bound_rep = 0;
events_rep = 0;
event_time_total_rep = 0.0f;
last_duration_rep = 0.0f;
memset(&now_rep, 0, sizeof(struct timeval));
memset(&start_rep, 0, sizeof(struct timeval));
memset(&min_event_rep, 0, sizeof(struct timeval));
memset(&max_event_rep, 0, sizeof(struct timeval));
memset(&lower_bound_rep, 0, sizeof(struct timeval));
memset(&upper_bound_rep, 0, sizeof(struct timeval));
}
long int PROCEDURE_TIMER::events_over_upper_bound(void) const { return(events_over_bound_rep); }
long int PROCEDURE_TIMER::events_under_lower_bound(void) const { return(events_under_bound_rep); }
long int PROCEDURE_TIMER::event_count(void) const { return(events_rep); }
double PROCEDURE_TIMER::max_duration_seconds(void) const { return(to_seconds(&max_event_rep)); }
double PROCEDURE_TIMER::min_duration_seconds(void) const { return(to_seconds(&min_event_rep)); }
double PROCEDURE_TIMER::average_duration_seconds(void) const { return(event_time_total_rep / event_count()); }
double PROCEDURE_TIMER::last_duration_seconds(void) const { return(last_duration_rep); }
const struct timespec* PROCEDURE_TIMER::min_duration(void) const { return(&max_event_rep); }
const struct timespec* PROCEDURE_TIMER::max_duration(void) const { return(&min_event_rep); }
static std::string priv_s2us(double sec)
{
return kvu_numtostr(sec * 1000000.0, 6);
}
std::string PROCEDURE_TIMER::to_string(void) const
{
std::string res;
res = idstr_rep + ":\n";
res += "Number of events: " + kvu_numtostr(event_count()) + "\n";
res += "Events over bound: " + kvu_numtostr(events_over_upper_bound());
res += " (" + kvu_numtostr(to_seconds(&upper_bound_rep), 8) + "sec)\n";
res += "Events under bound: " + kvu_numtostr(events_under_lower_bound());
res += " (" + kvu_numtostr(to_seconds(&lower_bound_rep), 8) + "sec)\n";
res += "Min duration, us: " + priv_s2us(min_duration_seconds()) + "\n";
res += "Max duration, us: " + priv_s2us(max_duration_seconds()) + "\n";
res += "Average duration, us: " + priv_s2us(average_duration_seconds()) + "\n";
res += "Duration of last event, us: " + priv_s2us(last_duration_rep) + "\n";
return(res);
}
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