From: David Miller <davem@davemloft.net>
To: pekkas@netcore.fi
Cc: netdev@vger.kernel.org
Subject: Re: high latency with TCP connections
Date: Fri, 01 Sep 2006 02:49:35 -0700 (PDT) [thread overview]
Message-ID: <20060901.024935.71090427.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.64.0609011241470.20878@netcore.fi>
From: Pekka Savola <pekkas@netcore.fi>
Date: Fri, 1 Sep 2006 12:44:48 +0300 (EEST)
> On Thu, 31 Aug 2006, David Miller wrote:
> ...
> >> Probably, aspect 1 of ABC just should be disabled. And the first my
> >> suggestion looks working too.
> >
> > I'm ready to rip out ABC entirely, to be honest. Or at least
> > turn it off by default.
>
> Just as a curious observer: do you think these issues are due to ABC
> implementation, or due to ABC specification?
It simply doesn't apply to us, as Alexey explained, because we prevent
ACK divison already when we apply the ACK to the retransmit queue
purging loop. If we didn't free any whole packets, we don't advance
the congestion window.
The other bit, dealing with delayed ACKs, we could handle another
way.
ABC is a very BSD specific algorithm, as Alexey also mentioned.
next prev parent reply other threads:[~2006-09-01 9:49 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-30 10:07 high latency with TCP connections Alexander Vodomerov
2006-08-30 17:27 ` Stephen Hemminger
2006-08-30 21:39 ` David Miller
2006-08-30 22:04 ` Stephen Hemminger
2006-08-30 23:00 ` Rick Jones
2006-08-31 8:14 ` Alexander Vodomerov
2006-08-31 15:44 ` Sridhar Samudrala
2006-08-31 18:22 ` Kelly Burkhart
2006-08-31 19:40 ` Rick Jones
2006-08-31 21:08 ` Ian McDonald
2006-08-31 21:46 ` Alexey Kuznetsov
2006-08-31 22:14 ` Stephen Hemminger
2006-08-31 22:44 ` David Miller
2006-08-31 23:29 ` Alexey Kuznetsov
2006-08-31 23:57 ` David Miller
2006-09-01 3:23 ` Stephen Hemminger
2006-09-01 3:39 ` Ian McDonald
2006-09-01 6:23 ` David Miller
2006-09-01 9:44 ` Pekka Savola
2006-09-01 9:49 ` David Miller [this message]
2006-09-01 9:47 ` Alexey Kuznetsov
2006-09-01 11:00 ` Evgeniy Polyakov
[not found] ` <20060901090046.69b3d583@localhost.localdomain>
2006-09-01 20:55 ` [PATCH] tcp: turn ABC off Stephen Hemminger
2006-09-02 7:22 ` Evgeniy Polyakov
2006-09-02 8:10 ` Herbert Xu
2006-09-04 9:10 ` high latency with TCP connections Alexey Kuznetsov
2006-09-04 16:00 ` [PATCH][RFC] " Alexey Kuznetsov
2006-09-05 17:55 ` Rick Jones
2006-09-05 22:13 ` Alexey Kuznetsov
2006-09-18 7:39 ` David Miller
2006-09-18 17:11 ` Rick Jones
2006-09-18 20:41 ` Alexey Kuznetsov
2006-09-18 21:24 ` Rick Jones
2006-09-18 22:51 ` Alexey Kuznetsov
2006-09-19 0:37 ` Rick Jones
2006-09-22 13:46 ` Alexey Kuznetsov
2006-09-22 17:15 ` Rick Jones
2006-09-18 7:31 ` David Miller
2006-09-18 10:37 ` Alexey Kuznetsov
2006-09-18 13:56 ` David Miller
2006-09-20 22:44 ` Stephen Hemminger
2006-09-20 22:47 ` David Miller
2006-09-20 22:55 ` Stephen Hemminger
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