forked from Imagelibrary/rtems
147 lines
3.2 KiB
C
147 lines
3.2 KiB
C
/**
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* @file
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*
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* Nanoseconds accuracy timestamp test
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*/
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/*
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* COPYRIGHT (c) 1989-2012.
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* On-Line Applications Research Corporation (OAR).
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*
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* The license and distribution terms for this file may be
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* found in the file LICENSE in this distribution or at
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* http://www.rtems.org/license/LICENSE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <rtems.h>
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#include <inttypes.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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#include <sys/time.h>
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#define CONFIGURE_INIT
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#include "system.h"
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#include <rtems/score/timespec.h> /* _Timespec_Substract */
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#include "tmacros.h"
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#include "pritime.h"
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const char rtems_test_name[] = "NANOSECOND CLOCK";
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static char *my_ctime( time_t t )
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{
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static char b[32];
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ctime_r(&t, b);
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b[ strlen(b) - 1] = '\0';
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return b;
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}
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static void subtract_em(
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struct timespec *start,
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struct timespec *stop,
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struct timespec *t
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)
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{
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t->tv_sec = 0;
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t->tv_nsec = 0;
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_Timespec_Subtract( start, stop, t );
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}
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rtems_task Init(
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rtems_task_argument argument
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)
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{
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rtems_status_code status;
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rtems_time_of_day time;
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int index;
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TEST_BEGIN();
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time.year = 2007;
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time.month = 03;
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time.day = 24;
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time.hour = 11;
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time.minute = 15;
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time.second = 0;
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time.ticks = 0;
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status = rtems_clock_set( &time );
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directive_failed( status, "clock set" );
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/*
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* Iterate 10 times showing difference in TOD
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*/
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printf( "10 iterations of getting TOD\n" );
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for (index=0 ; index <10 ; index++ ) {
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struct timespec start, stop;
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struct timespec diff;
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clock_gettime( CLOCK_REALTIME, &start );
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clock_gettime( CLOCK_REALTIME, &stop );
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subtract_em( &start, &stop, &diff );
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printf( "Start: %s:%ld\nStop : %s:%ld",
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my_ctime(start.tv_sec), start.tv_nsec,
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my_ctime(stop.tv_sec), stop.tv_nsec
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);
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printf( " --> %" PRIdtime_t ":%ld\n", diff.tv_sec, diff.tv_nsec );
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}
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/*
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* Iterate 10 times showing difference in Uptime
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*/
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printf( "\n10 iterations of getting Uptime\n" );
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for (index=0 ; index <10 ; index++ ) {
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struct timespec start, stop;
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struct timespec diff;
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rtems_clock_get_uptime( &start );
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rtems_clock_get_uptime( &stop );
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subtract_em( &start, &stop, &diff );
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printf( "%" PRIdtime_t ":%ld %" PRIdtime_t ":%ld --> %" PRIdtime_t ":%ld\n",
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start.tv_sec, start.tv_nsec,
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stop.tv_sec, stop.tv_nsec,
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diff.tv_sec, diff.tv_nsec
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);
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}
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/*
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* Iterate 10 times showing difference in Uptime with different counts
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*/
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printf( "\n10 iterations of getting Uptime with different loop values\n" );
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for (index=1 ; index <=10 ; index++ ) {
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struct timespec start, stop;
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struct timespec diff;
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long j, max = (index * 10000L);
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rtems_clock_get_uptime( &start );
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for (j=0 ; j<max ; j++ )
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dummy_function_empty_body_to_force_call();
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rtems_clock_get_uptime( &stop );
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subtract_em( &start, &stop, &diff );
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printf( "loop of %ld %" PRIdtime_t
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":%ld %" PRIdtime_t ":%ld --> %" PRIdtime_t ":%ld\n",
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max,
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start.tv_sec, start.tv_nsec,
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stop.tv_sec, stop.tv_nsec,
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diff.tv_sec, diff.tv_nsec
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);
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}
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sleep(1);
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TEST_END();
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exit(0);
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}
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