/*
* Nanoseconds accuracy timestamp test
*/
/* COPYRIGHT (c) 1989-2007.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*
* $Id$
*/
#define CONFIGURE_INIT
#include <rtems.h>
#include <inttypes.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/time.h>
#include <rtems/score/timespec.h> /* _Timespec_Substract */
char *my_ctime( time_t t )
{
static char b[32];
ctime_r(&t, b);
b[ strlen(b) - 1] = '\0';
return b;
}
void subtract_em(
struct timespec *start,
struct timespec *stop,
struct timespec *t
)
{
t->tv_sec = 0;
t->tv_nsec = 0;
_Timespec_Subtract( start, stop, t );
}
/* body below .. hoping it isn't inlined */
void dummy_function_empty_body_to_force_call();
rtems_task Init(
rtems_task_argument argument
)
{
rtems_status_code status;
rtems_time_of_day time;
int index;
puts( "\n\n*** NANOSECOND CLOCK TEST ***" );
time.year = 2007;
time.month = 03;
time.day = 24;
time.hour = 11;
time.minute = 15;
time.second = 0;
time.ticks = 0;
status = rtems_clock_set( &time );
/*
* Iterate 10 times showing difference in TOD
*/
printf( "10 iterations of getting TOD\n" );
for (index=0 ; index <10 ; index++ ) {
struct timespec start, stop;
struct timespec diff;
#if 0
clock_gettime( CLOCK_REALTIME, &start );
clock_gettime( CLOCK_REALTIME, &stop );
#else
_TOD_Get( &start );
_TOD_Get( &stop );
#endif
subtract_em( &start, &stop, &diff );
printf( "Start: %s:%d\nStop : %s:%d",
my_ctime(start.tv_sec), start.tv_nsec,
my_ctime(stop.tv_sec), stop.tv_nsec
);
printf( " --> %d:%d\n", diff.tv_sec, diff.tv_nsec );
}
/*
* Iterate 10 times showing difference in Uptime
*/
printf( "\n10 iterations of getting Uptime\n" );
for (index=0 ; index <10 ; index++ ) {
struct timespec start, stop;
struct timespec diff;
rtems_clock_get_uptime( &start );
rtems_clock_get_uptime( &stop );
subtract_em( &start, &stop, &diff );
printf( "%d:%d %d:%d --> %d:%d\n",
start.tv_sec, start.tv_nsec,
stop.tv_sec, stop.tv_nsec,
diff.tv_sec, diff.tv_nsec
);
}
/*
* Iterate 10 times showing difference in Uptime with different counts
*/
printf( "\n10 iterations of getting Uptime with different loop values\n" );
for (index=1 ; index <=10 ; index++ ) {
struct timespec start, stop;
struct timespec diff;
int j, max = (index * 10000);
rtems_clock_get_uptime( &start );
for (j=0 ; j<max ; j++ )
dummy_function_empty_body_to_force_call();
rtems_clock_get_uptime( &stop );
subtract_em( &start, &stop, &diff );
printf( "loop of %d %d:%d %d:%d --> %d:%d\n",
max,
start.tv_sec, start.tv_nsec,
stop.tv_sec, stop.tv_nsec,
diff.tv_sec, diff.tv_nsec
);
}
sleep(1);
puts( "*** END OF NANOSECOND CLOCK TEST ***" );
exit(0);
}
#include <bsp.h> /* for device driver prototypes */
#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
#define CONFIGURE_MICROSECONDS_PER_TICK 1000
#define CONFIGURE_MAXIMUM_TASKS 1
#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
#include <rtems/confdefs.h>
