#! perl
use 5.012;
use warnings;
use POSIX::RT::Clock;
use Linux::FD::Timer;
my %clocks = map { $_ => POSIX::RT::Clock->new($_) } POSIX::RT::Clock->get_clocks;
$clocks{per_process} = POSIX::RT::Clock->get_cpuclock(getppid) if POSIX::RT::Clock->can('get_cpuclock');
while (my ($name, $clock) = each %clocks) {
        say "$name: ", eval { Linux::FD::Timer->new($clock) } ? 1 : 0;
}