Listing 9: (a) RTLinux mutex test; (b) RTLinux mutex output.

(a)
Thread
   clock_gettime(CLOCK_REALTIME, &start);
   pthread_mutex_unlock(&mutex);
   pthread_mutex_lock(&mutex);
   clock_gettime(CLOCK_REALTIME, &end);

(b)
Uncontested Mutex Acquisition: (96h 0m 0s test)
19.2 us