From: kuznet@ms2.inr.ac.ru
To: ak@muc.de (Andi Kleen)
Cc: davem@redhat.com, ak@muc.de, linux-kernel@vger.kernel.org
Subject: Re: TCP acking too fast
Date: Sun, 14 Oct 2001 20:36:15 +0400 (MSK DST) [thread overview]
Message-ID: <200110141636.UAA05762@ms2.inr.ac.ru> (raw)
In-Reply-To: <20011014133004.34133@colin.muc.de> from "Andi Kleen" at Oct 14, 1 01:30:04 pm
Hello!
> I just checked and the 2.4 kernel doesn't have the PSH quickack check
> anymore,
Right, it is removed because all the PSHed packets are acked as soon
as rcvbuf is completely drained and window is full open.
See? It is the reason of "too frequent" ACKs and I daresay they
are not too frequent and it is impossible to do something with this.
These ACKs are an _absolute_ demand and delay by some small time
helps nothing destroying performance instead.
Well, it is the place, commented with "Dubious? ... final cut."
It is enough to delete it to avoid "too frequent" ACKs and to return
to too rare ACKs instead.
Alexey
next prev parent reply other threads:[~2001-10-14 16:36 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-10-14 0:23 Mika Liljeberg
2001-10-14 6:40 ` David S. Miller
2001-10-14 7:05 ` Mika Liljeberg
2001-10-14 7:47 ` David S. Miller
2001-10-14 7:51 ` Mika Liljeberg
2001-10-14 8:12 ` David S. Miller
2001-10-14 8:39 ` Mika Liljeberg
2001-10-14 9:03 ` David S. Miller
2001-10-14 9:15 ` Mika Liljeberg
2001-10-14 9:16 ` David S. Miller
2001-10-14 9:25 ` Andi Kleen
2001-10-14 9:39 ` David S. Miller
2001-10-14 11:30 ` Andi Kleen
2001-10-14 11:49 ` Mika Liljeberg
2001-10-14 14:05 ` Andi Kleen
2001-10-14 14:26 ` Mika Liljeberg
2001-10-14 16:12 ` Andi Kleen
2001-10-14 16:55 ` Mika Liljeberg
2001-10-14 17:07 ` kuznet
2001-10-14 17:26 ` Mika Liljeberg
2001-10-14 17:35 ` kuznet
2001-10-14 17:56 ` Mika Liljeberg
2001-10-14 18:20 ` kuznet
2001-10-14 18:48 ` Mika Liljeberg
2001-10-14 19:12 ` kuznet
2001-10-14 19:32 ` Mika Liljeberg
2001-10-14 19:40 ` kuznet
2001-10-14 20:06 ` Mika Liljeberg
2001-10-15 18:40 ` kuznet
2001-10-15 19:15 ` Mika Liljeberg
2001-10-15 19:38 ` Mika Liljeberg
2001-10-14 13:14 ` [PATCH] " Mika Liljeberg
2001-10-14 16:36 ` kuznet [this message]
2001-10-14 7:50 ` David S. Miller
2001-10-14 7:53 ` Mika Liljeberg
2001-10-15 20:59 ` Bill Davidsen
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