1./adnstest default -0x4000 2:0x70000000|1 0x40080000/chiark.greenend.org.uk 3 start 1414182770.758670 4 socket domain=AF_INET type=SOCK_DGRAM 5 socket=6 6 +0.000142 7 fcntl fd=6 cmd=F_GETFL 8 fcntl=~O_NONBLOCK&... 9 +0.000080 10 fcntl fd=6 cmd=F_SETFL O_NONBLOCK|... 11 fcntl=OK 12 +0.000060 13 close fd=6 14 close=OK 15 +0.000170 16