doc/examples/trigger-on-event/performance/producer.c

   1 /*
   2  * Copyright (C) 2020 Jérémie Galarneau <jeremie.galarneau@efficios.com>
   3  * Copyright (C) 2020 Jonathan Rajotte-Julien <jonathan.rajotte-julein@efficios.com>
   4  *
   5  * SPDX-License-Identifier: MIT
   6  *
   7  */
   8 #include "performance.h"
   9
  10 #include <lttng/tracepoint.h>
  11
  12 #include <lttng/condition/event-rule.h>
  13 #include <lttng/lttng.h>
  14
  15 #include <stdbool.h>
  16 #include <stddef.h>
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <sys/time.h>
  21 #include <time.h>
  22 #include <unistd.h>
  23 #include <assert.h>
  24
  25 int main(int argc, char **argv)
  26 {
  27         int ret = 0;
  28         int nb_hit;
  29         int id;
  30         long long sleep_ms;
  31         struct timespec sleep_time;
  32         struct timespec sleep_rm;
  33
  34         if (argc != 4) {
  35                 fprintf(stderr, "Missing unique_id\n");
  36                 fprintf(stderr, "Missing number of event \n");
  37                 fprintf(stderr, "Missing delay between event in ms \n");
  38                 fprintf(stderr, "Usage: producer id bn_event delay_ms\n");
  39                 ret = 1;
  40                 goto end;
  41         }
  42
  43         id = atoi(argv[1]);
  44         nb_hit = atoi(argv[2]);
  45         sleep_ms = atoll(argv[3]);
  46
  47         sleep_time.tv_sec = sleep_ms / 1000;
  48         sleep_time.tv_nsec = (sleep_ms % 1000) * 1000000;
  49
  50         for (int i = 0; i < nb_hit; i++) {
  51                 tracepoint(performance, hit, 0, i);
  52                 nanosleep(&sleep_time, &sleep_rm);
  53         }
  54
  55 end:
  56         return !!ret;
  57 }