mart/ex10/ex10a.c

   1 #include <stdio.h>
   2 #include <signal.h>
   3 #include <unistd.h>
   4 #include <sys/mman.h>
   5
   6 #include <native/task.h>
   7 #include <native/timer.h>
   8
   9 #include <rtdk.h>
  10
  11 #define SAMPLES 10000
  12 RT_TASK task;
  13
  14 RTIME times[SAMPLES];
  15
  16 void taskf(void *arg)
  17 {
  18         RT_TASK *curtask;
  19         rt_task_set_periodic(NULL, TM_NOW, 1e5);
  20
  21         unsigned int i;
  22         for(i = 0; i<SAMPLES; i++){
  23                 times[i] = rt_timer_read();
  24                 rt_task_wait_period(NULL);
  25         }
  26         FILE *file;
  27         file = fopen("ex10a.csv", "w");
  28         for(i = 0; i<SAMPLES-1; i++){
  29                 fprintf(file, "%u,%llu\n", i, times[i+1]-times[i]);
  30         }
  31         fclose(file);
  32 }
  33
  34 void taskw(void *arg)
  35 {
  36         rt_task_join(&task);
  37 }
  38
  39 int main(int argc, char* argv[])
  40 {
  41         rt_print_auto_init(1);
  42         mlockall(MCL_CURRENT | MCL_FUTURE);
  43         rt_task_create(&task, NULL, 0, 50, 0);
  44         rt_task_start(&task, &taskf, NULL);
  45         sleep(2);
  46 }