gethostlatency no output

gethostlatency on ubuntu Ubuntu 16.04.1 LTS (4.4.0-53-generic) after printinig colum headers produce no noticeable output

:/usr/share/bcc/tools# ./gethostlatency
TIME PID COMM LATms HOST
^C

while in other terminal a test program has been ran

ltrace ./a.out www.google.it
__libc_start_main(0x4006d6, 2, 0x7ffdd3ef79a8, 0x400790
gethostbyname("www.google.it") = 0x7fe3808581c0
printf("Hostname: %s\n", "www.google.it"Hostname: www.google.it
) = 24
inet_ntoa({ 0x23c63ad8 }) = "216.58.198.35"
printf("IP Address: %s\n", "216.58.198.35"IP Address: 216.58.198.35
) = 26
+++ exited (status 0) +++