Im not able to retrieve vm.swap_total on FreeBSD 12 Beta-2 ARM64, RaspberryPI 3B+. The retruned value is '?'
% sysctl vm.swap_total
vm.swap_total: 2147483648
/opt/kronometrix/perl/bin/perl -e 'use BSD::Sysctl qw(sysctl); my $b = BSD::Sysctl->new("vm.swap_total"); print $b->get();'
?
FreeBSD k50dev 12.0-BETA2 FreeBSD 12.0-BETA2 r339753 GENERIC arm64