501     struct timespec start_tm, end_tm;  in main()  local
503     struct timeval start_tm, end_tm;  in main()  local
590             start_tm.tv_sec = 0;  in main()
591             start_tm.tv_nsec = 0;  in main()
592             if (0 == clock_gettime(CLOCK_MONOTONIC, &start_tm))  in main()
599             start_tm.tv_sec = 0;  in main()
600             start_tm.tv_usec = 0;  in main()
601             gettimeofday(&start_tm, NULL);  in main()
612             if (start_tm.tv_sec || start_tm.tv_nsec) {  in main()
622                 elapsed_usecs = (end_tm.tv_sec - start_tm.tv_sec) * 1000000;  in main()
624                 elapsed_usecs += (end_tm.tv_nsec - start_tm.tv_nsec) / 1000;  in main()
627             if (start_tm.tv_sec || start_tm.tv_usec) {  in main()
629                 elapsed_usecs = (end_tm.tv_sec - start_tm.tv_sec) * 1000000;  in main()
630                 elapsed_usecs += (end_tm.tv_usec - start_tm.tv_usec);  in main()