From: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
To: Benjamin LaHaise <bcrl@kvack.org>
Cc: "David S. Miller" <davem@davemloft.net>, netdev@vger.kernel.org
Subject: Re: [PATCH?] tcp and delayed acks
Date: Thu, 17 Aug 2006 02:39:57 +0400 [thread overview]
Message-ID: <20060816223957.GA13157@ms2.inr.ac.ru> (raw)
In-Reply-To: <20060816205532.GF9519@kvack.org>
Hello!
> send out any delayed ACKs when it is clear that the receiving process is
> waiting for more data?
It has just be done in tcp_cleanup_rbuf() a few lines before your chunk.
There is some somplex condition to be satisfied there and it is
impossible to relax it any further.
I do not know what is wrong in your case, check what of conditions
in tcp_cleanup_rbuf() was not satisfied. Or just tcpdump a little.
BTW what "buffer" do you mean? SO_SNDBUF? SO_RCVBUF? Something else?
TCP tries to tune itself to weird buffer sizes to allow to have
at least 2 segments in flight exactly to address the problem with delayed
ACKs, but it is quite easy to confuse those heuristics.
Alexey
prev parent reply other threads:[~2006-08-16 22:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-16 20:55 [PATCH?] tcp and delayed acks Benjamin LaHaise
2006-08-16 19:11 ` Stephen Hemminger
2006-08-16 21:15 ` David Miller
2006-08-16 21:37 ` Rick Jones
2006-08-16 21:41 ` Benjamin LaHaise
2006-08-16 22:39 ` Alexey Kuznetsov [this message]
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