SO_TXTIME ipv4 clock monotonic
payload:a delay:3038 expected:0 (us)

SO_TXTIME ipv6 clock monotonic
payload:a delay:8070 expected:0 (us)
./so_txtime: exceeds variance (4000 us)
:: [  FAIL  ] :: Test '33..84 selftests: net:so_txtime.sh [FAIL]'