From: "David S. Miller" <davem@redhat.com>
To: Stephen Lee <mukansai@emailplus.org>, torvalds@osdl.org
Cc: scott.feldman@intel.com, laforge@netfilter.org,
netfilter-devel@lists.netfilter.org,
linux-kernel@vger.kernel.org
Subject: Re: Extremely slow network with e1000 & ip_conntrack
Date: Thu, 4 Dec 2003 10:24:20 -0800 [thread overview]
Message-ID: <20031204102420.2aa43b43.davem@redhat.com> (raw)
In-Reply-To: <20031204213030.2B75.MUKANSAI@emailplus.org>
On Thu, 04 Dec 2003 21:36:09 +0900
Stephen Lee <mukansai@emailplus.org> wrote:
> "Feldman, Scott" <scott.feldman@intel.com> wrote:
> >
> > Try turning off TSO by disabling this code or by using "ethtool -K tso
> > off" (need version 1.8).
>
> Yes, turning off TSO with ethtool fixed it (tested on 2.6.0-test11). At
> least we have a workaround now.
>
> Thanks Scott, Harald and Dave.
>
> Is it not supported by the hardware? Seems TSO could improve
> performance a bit since the 1000/MT Desktop is starved for PCI bandwidth
> at 32-bit/33MHz.
This workaround explains everything. The TSO packets have to be
"un-TSO'd" in order for netfilter to look at the packet and parse
the contents. This means copying all the data around, allocating
several networking buffers, etc.
next prev parent reply other threads:[~2003-12-04 18:24 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-04 6:51 Extremely slow network with e1000 & ip_conntrack Feldman, Scott
2003-12-04 12:36 ` Stephen Lee
2003-12-04 18:24 ` David S. Miller [this message]
2003-12-05 20:45 ` Stephen Lee
2003-12-05 20:28 ` David S. Miller
2003-12-05 22:20 ` Stephen Lee
2003-12-05 22:56 ` David S. Miller
2003-12-11 7:26 ` Harald Welte
2003-12-11 8:25 ` Henrik Nordstrom
2003-12-11 11:03 ` TSO and netfilter (Re: Extremely slow network with e1000 & ip_conntrack) Harald Welte
2003-12-12 1:41 ` David S. Miller
2003-12-12 7:01 ` Harald Welte
2003-12-12 8:00 ` David S. Miller
-- strict thread matches above, loose matches on Subject: below --
2003-12-04 17:37 Extremely slow network with e1000 & ip_conntrack Feldman, Scott
2003-12-04 18:30 ` David S. Miller
2003-12-04 19:53 ` Stephen Lee
2003-12-04 20:09 ` Jeff Garzik
2003-12-05 13:25 ` Stephen Lee
2003-12-04 20:20 ` David S. Miller
2003-12-04 7:24 Feldman, Scott
2003-11-26 8:49 Stephen Lee
2003-11-28 19:55 ` Stephen Lee
2003-11-29 22:54 ` Stephen Lee
2003-11-30 15:52 ` Harald Welte
2003-12-02 11:44 ` Stephen Lee
2003-12-03 5:03 ` David S. Miller
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