From: "David S. Miller" <davem@redhat.com>
To: jros@ece.uci.edu
Cc: scott.feldman@intel.com, linux-kernel@vger.kernel.org,
linux-net@vger.kernel.org, haveblue@us.ibm.com,
Manand@us.ibm.com, kuznet@ms2.inr.ac.ru,
christopher.leech@intel.com
Subject: Re: TCP Segmentation Offloading (TSO)
Date: Mon, 02 Sep 2002 23:52:44 -0700 (PDT) [thread overview]
Message-ID: <20020902.235244.64832172.davem@redhat.com> (raw)
In-Reply-To: <JCEFIMMPGNNGFPMJJKINGEMHCDAA.jros@ece.uci.edu>
From: "Jordi Ros" <jros@ece.uci.edu>
Date: Mon, 2 Sep 2002 21:58:32 -0700
i assume the mtu is ethernet 1500 Bytes, right? and that mss should be
something much bigger than mtu, which gives the performance improvement
shown in the numbers.
The performance improvement comes from the fact that the card
is given huge 64K packets, then the card (using the given ip/tcp
headers as a template) spits out 1500 byte mtu sized packets.
Less data DMA'd to the device per normal-mtu packet and less
per-packet data structure work by the cpu is where the improvement
comes from.
next prev parent reply other threads:[~2002-09-03 6:54 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-09-02 17:45 TCP Segmentation Offloading (TSO) Feldman, Scott
2002-09-02 18:58 ` kuznet
2002-09-03 7:42 ` Hirokazu Takahashi
2002-09-03 7:51 ` David S. Miller
2002-09-03 11:27 ` Paul Mackerras
2002-09-03 11:29 ` David S. Miller
2002-09-03 12:21 ` kuznet
2002-09-03 13:03 ` Hirokazu Takahashi
2002-09-03 13:19 ` Hirokazu Takahashi
2002-09-03 13:22 ` kuznet
2002-09-03 21:05 ` David S. Miller
2002-09-03 21:20 ` David S. Miller
2002-09-04 1:02 ` H. Peter Anvin
2002-09-04 1:54 ` David S. Miller
2002-09-04 22:39 ` Gabriel Paubert
2002-09-04 22:41 ` H. Peter Anvin
2002-09-05 2:13 ` Hirokazu Takahashi
2002-09-05 2:21 ` David S. Miller
2002-09-05 10:28 ` Gabriel Paubert
2002-09-05 11:17 ` Jamie Lokier
2002-09-05 13:21 ` Gabriel Paubert
2002-09-05 13:17 ` David S. Miller
2002-09-08 4:20 ` Hirokazu Takahashi
2002-09-08 4:29 ` H. Peter Anvin
2002-09-04 23:17 ` Alan Cox
2002-09-05 0:09 ` Jamie Lokier
2002-09-02 19:06 ` Jeff Garzik
2002-09-02 23:13 ` David S. Miller
2002-09-03 4:58 ` Jordi Ros
2002-09-03 6:52 ` David S. Miller [this message]
2002-09-03 7:26 ` Jordi Ros
2002-09-03 7:39 ` David S. Miller
[not found] <288F9BF66CD9D5118DF400508B68C4460283E564@orsmsx113.jf.intel.com.suse.lists.linux.kernel>
[not found] ` <200209021858.WAA00388@sex.inr.ac.ru.suse.lists.linux.kernel>
[not found] ` <20020903.164243.21934772.taka@valinux.co.jp.suse.lists.linux.kernel>
[not found] ` <20020903.005119.50342945.davem@redhat.com.suse.lists.linux.kernel>
2002-09-03 9:05 ` Andi Kleen
2002-09-03 10:00 ` David S. Miller
2002-09-03 10:10 ` Andi Kleen
2002-09-03 10:09 ` David S. Miller
-- strict thread matches above, loose matches on Subject: below --
2002-09-03 17:50 Feldman, Scott
2002-09-03 18:09 Manfred Spraul
2002-09-03 23:08 ` Hirokazu Takahashi
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