From: Lincoln Dale <ltd@cisco.com>
To: Anton Blanchard <anton@samba.org>
Cc: "David S. Miller" <davem@redhat.com>,
haveblue@us.ibm.com, hdierks@us.ibm.com, scott.feldman@intel.com,
dwg@au1.ibm.com, linux-kernel@vger.kernel.org,
milliner@us.ibm.com, ricardoz@us.ibm.com, twichell@us.ibm.com,
netdev@oss.sgi.com
Subject: Re: e1000 performance hack for ppc64 (Power4)
Date: Sat, 14 Jun 2003 11:52:53 +1000 [thread overview]
Message-ID: <5.1.0.14.2.20030614114755.036abbb0@mira-sjcm-3.cisco.com> (raw)
In-Reply-To: <20030613231836.GD32097@krispykreme>
At 09:18 AM 14/06/2003 +1000, Anton Blanchard wrote:
> > Not really... one retransmit and the TCP header size grows
> > due to the SACK options.
>
>OK scratch that idea.
why not have a performance option that is a tradeoff between optimum
payload size versus efficiency.
unless i misunderstand the problem, you can certainly pad the TCP options
with NOPs ...
> > I find it truly bletcherous what you're trying to do here.
>
>I think so too, but its hard to ignore ~100Mbit/sec in performance.
another option is for the write() path is for instantant-send TCP sockets
to delay the copy_from_user() until the IP+TCP header size is known.
i wouldn't expect the net folks to like that, however ..
cheers,
lincoln.
next prev parent reply other threads:[~2003-06-14 5:27 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-13 15:17 e1000 performance hack for ppc64 (Power4) Herman Dierks
2003-06-13 16:21 ` Dave Hansen
2003-06-13 22:38 ` Anton Blanchard
2003-06-13 22:46 ` David S. Miller
2003-06-13 23:18 ` Anton Blanchard
2003-06-14 1:52 ` Lincoln Dale [this message]
2003-06-14 5:41 ` David S. Miller
2003-06-14 5:52 ` Lincoln Dale
2003-06-14 6:08 ` David S. Miller
2003-06-14 6:14 ` David S. Miller
2003-06-14 6:27 ` William Lee Irwin III
2003-06-14 17:08 ` Greg KH
2003-06-14 17:19 ` Greg KH
2003-06-14 17:21 ` Riley Williams
2003-06-15 3:01 ` David S. Miller
2003-06-14 5:16 ` Nivedita Singhvi
2003-06-14 5:36 ` David S. Miller
-- strict thread matches above, loose matches on Subject: below --
2003-06-16 18:56 Feldman, Scott
2003-06-16 18:21 Feldman, Scott
2003-06-16 18:30 ` Dave Hansen
2003-06-15 14:40 Herman Dierks
2003-06-15 14:44 ` David S. Miller
2003-06-16 16:17 ` Nivedita Singhvi
2003-06-15 14:32 Herman Dierks
2003-06-13 23:52 Feldman, Scott
2003-06-13 23:52 ` David S. Miller
2003-06-14 0:55 ` Anton Blanchard
2003-06-14 1:34 ` David S. Miller
2003-06-14 0:03 ` Anton Blanchard
2003-06-13 22:13 Feldman, Scott
2003-06-13 17:03 Herman Dierks
2003-06-13 1:16 Feldman, Scott
2003-06-13 23:15 ` Anton Blanchard
2003-06-12 3:32 David Gibson
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