ITTAPI__itt_task_*

Function Parameters

Enable Task APIs

Include
ittnotify.h
header.
Create domain and string handles for your tasks.
Insert task begin and task end marks in your code.
Link to
libittnotify.lib
(Windows*) or
libittnotify.a
(Linux*).
Enable the
Analyze user tasks, events, and counters
option before profiling. For more information, see Task Analysis topic.

Usage Example

#include "ittnotify.h"

void do_foo(double seconds);

__itt_domain* domain = __itt_domain_create("MyTraces.MyDomain");
__itt_string_handle* shMyTask = __itt_string_handle_create("My Task");
__itt_string_handle* shMySubtask = __itt_string_handle_create("My SubTask");

void BeginFrame() {
     __itt_task_begin(domain, __itt_null, __itt_null, shMyTask);
     do_foo(1);
}

void DoWork() {
     __itt_task_begin(domain, __itt_null, __itt_null, shMySubtask);
     do_foo(1);
     __itt_task_end(domain);
}
void EndFrame() {
     do_foo(1);
     __itt_task_end(domain);
}

int main() {
    BeginFrame();
    DoWork();
    EndFrame();
    return 0;
}

#ifdef _WIN32
#include <ctime>

void do_foo(double seconds) {
    clock_t goal = (clock_t)((double)clock() + seconds * CLOCKS_PER_SEC);
    while (goal > clock());
}
#else
#include <time.h>

#define NSEC 1000000000
#define TYPE long

void do_foo(double sec) {
      struct timespec start_time;
      struct timespec current_time;

      clock_gettime(CLOCK_REALTIME, &start_time);
      while(1) {
          clock_gettime(CLOCK_REALTIME, &current_time);
          TYPE cur_nsec=(long)((current_time.tv_sec-start_time.tv_sec-sec)*NSEC + current_time.tv_nsec - start_time.tv_nsec);
          if(cur_nsec>=0)
                break;
      }
}
#endif