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SubjectPF_PACKET: packets out of order
Date
Hi!

NeTraMet v44b10 uses pcap(3) and complains about timestamps jumping
backwards. Looks like a PF_PACKET socket doesn't receive the packets
in the correct order. Some timestamps from a "tcpdump -tt":

RX: 1001465480.175100 [...]
TX: 1001465480.179111 [...]
RX: 1001465480.177315 [...]
^^^^^^
TX: 1001465480.180514 [...]
RX: 1001465480.179706 [...]

Some more figures (obtained with a quick hack using libpcap-2001.09.25
on two different machines):

2.2.19:
stats: 100000 packets received
0 packets dropped
good: 90222 packets
bad: 9778 packets
max delta: 15850 usec

2.4.1:
stats: 100000 packets received
0 packets dropped
good: 99538 packets
bad: 462 packets
max delta: 471 usec

Any plans to fix this in the kernel?


Regards,
Joerg

--
Gaertner Datensysteme 38114 Braunschweig
Joerg Schumacher Hamburger Str. 273a
Tel: 0531-2335555 Fax: 0531-2335556
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