182 lines
6.1 KiB
C
182 lines
6.1 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: profile.c,v 1.3 2007/11/18 19:16:49 oliverschmidt Exp $
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*/
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/**
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* \file
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* Implementation of the Contiki profiling system
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "sys/profile.h"
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#include <stddef.h> /* For NULL */
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unsigned int profile_timestamp_ptr;
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struct profile_timestamp profile_timestamps[PROFILE_LIST_LENGTH];
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rtimer_clock_t profile_timestamp_time;
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int profile_invalid_episode_overflow, profile_invalid_episode_toolong;
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int profile_max_queuelen = 0;
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static rtimer_clock_t episode_start_time;
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/* The number of fine grained ticks per coarse grained ticks. We
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currently (MSP430) have 2457600 ticks per second for the fine
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grained timer, and 32678 / 8 ticks per second for the coarse. */
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#define FINE_TICKS_PER_COARSE_TICK (2457600/(32678/8))
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/* XXX hack: we use a function called clock_counter() that is not part
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of the clock API and currently is only implemented for the
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MSP430. We therefore declare this function here instead of in
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dev/clock.h. */
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rtimer_clock_t clock_counter(void);
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/*---------------------------------------------------------------------------*/
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rtimer_clock_t
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profile_timediff(const char *ptr1, const char *ptr2)
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{
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int i;
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int t1, t2;
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int timestamp_ptr = PROFILE_TIMESTAMP_PTR;
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/* printf("profile_timestamp_ptr %d max %d\n", profile_timestamp_ptr, profile_max_queuelen);*/
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t1 = t2 = PROFILE_LIST_LENGTH;
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for(i = timestamp_ptr - 1; i >= 0; --i) {
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/* printf("Checking 1 %s %u == %s i %d\n",
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profile_timestamps[i].ptr,
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profile_timestamps[i].time,
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ptr1, i);*/
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if(profile_timestamps[i].ptr == ptr1) {
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t1 = i;
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break;
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}
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}
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for(i = i - 1; i >= 0; --i) {
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/* printf("Checking 2 %s %u == %s i %d\n",
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profile_timestamps[i].ptr,
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profile_timestamps[i].time,
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ptr1, i);*/
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if(profile_timestamps[i].ptr == ptr2) {
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t2 = i;
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break;
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}
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}
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/* printf("t1 %d t2 %d\n", t1, t2);*/
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if(t1 != PROFILE_LIST_LENGTH && t2 != PROFILE_LIST_LENGTH) {
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return profile_timestamps[t1].time - profile_timestamps[t2].time;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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profile_clear_timestamps(void)
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{
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/* int i;
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for(i = 0; i < PROFILE_LIST_LENGTH; ++i) {
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profile_timestamps[i].str = "NULL";
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profile_timestamps[i].time = 0;
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}*/
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profile_timestamp_ptr = 0;
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}
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/*---------------------------------------------------------------------------*/
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void
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profile_init(void)
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{
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profile_clear_timestamps();
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/* Measure the time for taking a timestamp. */
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PROFILE_TIMESTAMP(NULL);
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PROFILE_TIMESTAMP(NULL);
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profile_timestamp_time = profile_timestamps[1].time - profile_timestamps[0].time;
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profile_clear_timestamps();
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}
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/*---------------------------------------------------------------------------*/
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void
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profile_episode_start(void)
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{
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profile_timestamp_ptr = 0;
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episode_start_time = clock_counter();
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profile_timestamps[PROFILE_LIST_LENGTH - 1].ptr = NULL;
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}
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/*---------------------------------------------------------------------------*/
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void
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profile_episode_end(void)
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{
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rtimer_clock_t episode_end_time = clock_counter();
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PROFILE_TIMESTAMP("profile_episode_end");
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/* printf("profile_episode_end start %u, end %u, max time %u\n", episode_start_time, episode_end_time, 65536/FINE_TICKS_PER_COARSE_TICK); */
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if(profile_timestamps[PROFILE_LIST_LENGTH - 1].ptr != NULL) {
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/* Invalid episode because of list overflow. */
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profile_invalid_episode_overflow++;
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profile_max_queuelen = PROFILE_LIST_LENGTH;
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} else if(episode_end_time - episode_start_time > 65536/FINE_TICKS_PER_COARSE_TICK) {
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/* Invalid episode because of timer overflow. */
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profile_invalid_episode_toolong++;
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} else {
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/* Compute aggregates. */
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if(PROFILE_TIMESTAMP_PTR > profile_max_queuelen) {
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profile_max_queuelen = PROFILE_TIMESTAMP_PTR;
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}
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profile_aggregates_compute();
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/* printf("Episode length %d\n", profile_timestamp_ptr);*/
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}
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/* profile_aggregates_print(); */
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/* profile_print_stats(); */
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}
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/*---------------------------------------------------------------------------*/
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#if 0
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#include <stdio.h>
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void
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profile_print_stats(void)
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{
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printf("Memory for profiling: %d * %d = %d\n",
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sizeof(struct profile_timestamp), profile_max_queuelen,
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sizeof(struct profile_timestamp) * profile_max_queuelen);
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printf("Invalid episodes overflow %d time %d\n",
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profile_invalid_episode_overflow,
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profile_invalid_episode_toolong);
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}
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#endif /* 0 */
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/*---------------------------------------------------------------------------*/
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