print STDERR " interval : sample interval in seconds\n";
print STDERR "example: $pname lustre-OST0000 2\n";
print STDERR "Use CTRL + C to stop statistics printing\n";
print STDERR " interval : sample interval in seconds\n";
print STDERR "example: $pname lustre-OST0000 2\n";
print STDERR "Use CTRL + C to stop statistics printing\n";