I was testing my new gigabit cards and got negative min time reported by ping:
% sudo ping -f 192.168.1.18 PING 192.168.1.18 (192.168.1.18): 56 data bytes --- 192.168.1.18 ping statistics --- 31782486 packets transmitted, 31782470 packets received, 0.0% packet loss round-trip min/avg/max/std-dev = -9.-697/0.771/93.322/0.466 ms % uname -a OpenBSD home.nest.cx 3.7 GENERIC#31 amd64
