NAME
Linux::GetPidstat::Writer::File - Write pidstat's results to a file
SYNOPSIS
use Linux::GetPidstat::Writer::File;
my $t = localtime;
my $instance = Linux::GetPidstat::Writer::File->new(
    res_file => './res.log',
    now      => $t,
    dry_run  => '0',
);
$instance->output('backup_mysql', 'cpu', '21.20');