kuznet@ms2.inr.ac.ru wrote:
> > Yes, definitely. Btw, I saw a ping round trip time of 162s just now.
>
> I do not understand, do you share this link with someone or
> ping over tcp connection?
I was doing ping with the TCP connection going. When there is no TCP
connection, ping time is 1-1.5 seconds.
> > I saw very few retransmits in a single message download. SACK appears
> > occasionally. I don't really understand the local reaction to SACK, or
> > why a SACK option appears in one ACK sent locally and not the following
> > ACK, even though the SACK mentions data that does not arrive between the
> > two locally sent ACKs.
>
> But I do not see _any_ sacks in your tcpdumps.
Sorry, you are right. I did see an sack, but not in this trace.
> > The throughput difference was obvious: POP3 negotiation + 30k message +
> > headers took:
> >
> > 5 min 31 sec downloading unknown OS -> Linux 2.4.7
> > 2 min 15 sec downloading Linux 2.4.2 -> Linux 2.4.7
>
> It is dominated by rtt, one rtt per segment. It is very strange
> that cwnd does not want to open. Maybe, it is worth to tcpdump at proxy.
Do you mean that you want to see the Linux -> Linux connection, with
tcpdumps at both ends?
-- Jamie
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Fri Sep 07 2001 - 21:00:20 EST