source: rtems/testsuites/samples/nsecs/init.c @ 8bfffd9b

4.104.114.84.95
Last change on this file since 8bfffd9b was 8bfffd9b, checked in by Joel Sherrill <joel.sherrill@…>, on Jun 22, 2007 at 7:27:35 PM

2007-06-22 Joel Sherrill <joel.sherrill@…>

  • nsecs/init.c: Do not make this test depend on the benchmark timer driver.
  • Property mode set to 100644
File size: 3.3 KB
Line 
1/*
2 *  Nanoseconds accuracy timestamp test
3 */
4
5/*  COPYRIGHT (c) 1989-2007.
6 *  On-Line Applications Research Corporation (OAR).
7 *
8 *  The license and distribution terms for this file may be
9 *  found in the file LICENSE in this distribution or at
10 *  http://www.rtems.com/license/LICENSE.
11 *
12 *  $Id$
13 */
14
15#define CONFIGURE_INIT
16
17#include <rtems.h>
18#include <inttypes.h>
19#include <stdio.h>
20#include <string.h>
21#include <stdlib.h>
22#include <sys/time.h>
23#include <rtems/score/timespec.h> /* _Timespec_Substract */
24
25char *my_ctime( time_t t )
26{
27  static char b[32];
28  ctime_r(&t, b);
29  b[ strlen(b) - 1] = '\0';
30  return b; 
31}
32
33void subtract_em(
34  struct timespec *start,
35  struct timespec *stop,
36  struct timespec *t
37)
38{
39  t->tv_sec = 0;
40  t->tv_nsec = 0;
41  _Timespec_Subtract( start, stop, t );
42}
43
44/* body below .. hoping it isn't inlined */
45void Empty_function();
46
47rtems_task Init(
48  rtems_task_argument argument
49)
50{
51  rtems_status_code status;
52  rtems_time_of_day time;
53  int index;
54
55  puts( "\n\n*** NANOSECOND CLOCK TEST ***" );
56
57  time.year   = 2007;
58  time.month  = 03;
59  time.day    = 24;
60  time.hour   = 11;
61  time.minute = 15;
62  time.second = 0;
63  time.ticks  = 0;
64
65  status = rtems_clock_set( &time );
66
67  /*
68   *  Iterate 10 times showing difference in TOD
69   */
70  printf( "10 iterations of getting TOD\n" );
71  for (index=0 ; index <10 ; index++ ) {
72    struct timespec start, stop;
73    struct timespec diff;
74#if 0
75    clock_gettime( CLOCK_REALTIME, &start );
76    clock_gettime( CLOCK_REALTIME, &stop );
77#else
78    _TOD_Get( &start );
79    _TOD_Get( &stop );
80#endif
81
82    subtract_em( &start, &stop, &diff );
83    printf( "Start: %s:%d\nStop : %s:%d",
84      my_ctime(start.tv_sec), start.tv_nsec,
85      my_ctime(stop.tv_sec), stop.tv_nsec
86    );
87
88   printf( " --> %d:%d\n", diff.tv_sec, diff.tv_nsec );
89  }
90
91  /*
92   *  Iterate 10 times showing difference in Uptime
93   */
94  printf( "\n10 iterations of getting Uptime\n" );
95  for (index=0 ; index <10 ; index++ ) {
96    struct timespec start, stop;
97    struct timespec diff;
98    rtems_clock_get_uptime( &start );
99    rtems_clock_get_uptime( &stop );
100
101    subtract_em( &start, &stop, &diff );
102    printf( "%d:%d %d:%d --> %d:%d\n",
103      start.tv_sec, start.tv_nsec,
104      stop.tv_sec, stop.tv_nsec,
105      diff.tv_sec, diff.tv_nsec
106   );
107  }
108
109  /*
110   *  Iterate 10 times showing difference in Uptime with different counts
111   */
112  printf( "\n10 iterations of getting Uptime with different loop values\n" );
113  for (index=1 ; index <=10 ; index++ ) {
114    struct timespec start, stop;
115    struct timespec diff;
116    int j, max = (index * 10000);
117    rtems_clock_get_uptime( &start );
118      for (j=0 ; j<max ; j++ ) 
119        Empty_function();
120    rtems_clock_get_uptime( &stop );
121
122    subtract_em( &start, &stop, &diff );
123    printf( "loop of %d %d:%d %d:%d --> %d:%d\n",
124      max,
125      start.tv_sec, start.tv_nsec,
126      stop.tv_sec, stop.tv_nsec,
127      diff.tv_sec, diff.tv_nsec
128   );
129  }
130
131  sleep(1);
132
133  puts( "*** END OF NANOSECOND CLOCK TEST ***" );
134  exit(0);
135}
136
137
138#include <bsp.h> /* for device driver prototypes */
139
140#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
141#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
142
143#define CONFIGURE_MICROSECONDS_PER_TICK 1000
144#define CONFIGURE_MAXIMUM_TASKS            1
145#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
146
147#include <rtems/confdefs.h>
148
149/* put here hoping it won't get inlined */
150void Empty_function() {}
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