usleep           112 libproff/utils.c                         usleep (2000000);
usleep           128 libproff/utils.c                         usleep (2000000);
usleep           143 libproff/utils.c                         usleep (2000000);
usleep           169 libproff/utils.c                         usleep (2000000);
usleep           888 src/xover.c                      usleep (5000); /* doesn't use SIGALRM */