osd-contiki/core/sys/profile.c

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/*
* Copyright (c) 2007, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
* $Id: profile.c,v 1.4 2008/01/17 12:19:26 adamdunkels Exp $
*/
/**
* \file
* Implementation of the Contiki profiling system
* \author
* Adam Dunkels <adam@sics.se>
*/
#include "sys/profile.h"
#include "sys/clock.h"
#include <stdio.h>
/* XXX: the profiling code is under development and may not work at
present. */
TIMETABLE_NONSTATIC(profile_timetable);
TIMETABLE_NONSTATIC(profile_begin_timetable);
TIMETABLE_NONSTATIC(profile_end_timetable);
TIMETABLE_AGGREGATE(profile_aggregate, PROFILE_AGGREGATE_SIZE);
static rtimer_clock_t episode_start_time;
static unsigned int invalid_episode_overflow, invalid_episode_toolong,
max_queuelen;
/* The number of fine grained ticks per coarse grained ticks. We
currently (MSP430) have 2457600 ticks per second for the fine
grained timer, and 32678 / 8 ticks per second for the coarse. */
#define XXX_HACK_FINE_TICKS_PER_COARSE_TICK (2457600/(32678/8))
/*---------------------------------------------------------------------------*/
void
profile_init(void)
{
timetable_init();
timetable_clear(&profile_begin_timetable);
timetable_clear(&profile_end_timetable);
}
/*---------------------------------------------------------------------------*/
void
profile_episode_start(void)
{
struct timetable_timestamp *e;
timetable_clear(&profile_begin_timetable);
timetable_clear(&profile_end_timetable);
episode_start_time = clock_time();
e = timetable_entry(&profile_begin_timetable,
PROFILE_TIMETABLE_SIZE - 1);
if(e != NULL) {
e->id = NULL;
}
e = timetable_entry(&profile_end_timetable,
PROFILE_TIMETABLE_SIZE - 1);
if(e != NULL) {
e->id = NULL;
}
}
/*---------------------------------------------------------------------------*/
void
profile_episode_end(void)
{
struct timetable_timestamp *e;
rtimer_clock_t episode_end_time = clock_time();
/* printf("timetable_episode_end start %u, end %u, max time %u\n", episode_start_time, episode_end_time, 65536/FINE_TICKS_PER_COARSE_TICK); */
e = timetable_entry(&profile_begin_timetable,
PROFILE_TIMETABLE_SIZE - 1);
if(e != NULL && e->id != NULL) {
/* Invalid episode because of list overflow. */
invalid_episode_overflow++;
max_queuelen = PROFILE_TIMETABLE_SIZE;
} else if(episode_end_time - episode_start_time >
65536/XXX_HACK_FINE_TICKS_PER_COARSE_TICK) {
/* Invalid episode because of timer overflow. */
invalid_episode_toolong++;
} else {
/* Compute aggregates. */
if(timetable_ptr(&profile_begin_timetable) > max_queuelen) {
max_queuelen = timetable_ptr(&profile_begin_timetable);
}
/* timetable_aggregates_compute();*/
}
}
/*---------------------------------------------------------------------------*/
/*
*
* Find a specific aggregate ID in the list of aggregates.
*
*/
static struct timetable_aggregate_entry *
find_aggregate(struct timetable_aggregate *a,
const char *id)
{
int i;
for(i = 0; i < a->ptr; ++i) {
if(a->entries[i].id == id) {
return &a->entries[i];
}
}
if(i == a->size) {
return NULL;
}
a->entries[a->ptr].id = NULL;
return &a->entries[a->ptr++];
}
/*---------------------------------------------------------------------------*/
void
profile_aggregate_print_detailed(void)
{
int i;
struct timetable_aggregate *a = &profile_aggregate;
/* printf("timetable_aggregate_print_detailed: a ptr %d\n", a->ptr);*/
for(i = 0; i < a->ptr; ++i) {
printf("-- %s: %lu / %u = %lu\n", a->entries[i].id,
a->entries[i].time,
a->entries[i].episodes,
a->entries[i].time / a->entries[i].episodes);
}
printf("Memory for entries: %d * %d = %d\n",
(int)sizeof(struct timetable_aggregate), a->ptr,
(int)sizeof(struct timetable_aggregate) * a->ptr);
}
/*---------------------------------------------------------------------------*/
void
profile_aggregate_compute_detailed(void)
{
int i;
int last;
rtimer_clock_t t;
struct timetable_aggregate *a = &profile_aggregate;
struct timetable *timetable = &profile_timetable;
struct timetable_aggregate_entry *entry;
last = timetable_ptr(&profile_begin_timetable);
t = profile_begin_timetable.timestamps[0].time;
for(i = 0; i < last; ++i) {
entry = find_aggregate(a, profile_begin_timetable.timestamps[i].id);
if(entry == NULL) {
/* The list is full, skip this entry */
/* printf("detailed_timetable_aggregate_compute: list full\n");*/
} else if(entry->id == NULL) {
/* The id was found in the list, so we add it. */
entry->id = timetable->timestamps[i - 1].id;
entry->time = (unsigned long)(timetable->timestamps[i].time - t -
timetable_timestamp_time);
entry->episodes = 1;
/* printf("New entry %s %lu\n", entry->id, entry->time);*/
} else {
entry->time += (unsigned long)(timetable->timestamps[i].time - t -
timetable_timestamp_time);
entry->episodes++;
}
t = timetable->timestamps[i].time;
/* printf("a ptr %d\n", a->ptr);*/
}
}
/*---------------------------------------------------------------------------*/