From: Jeff Garzik <jgarzik@pobox.com>
To: "Feldman, Scott" <scott.feldman@intel.com>
Cc: netdev@oss.sgi.com, ricardoz@us.ibm.com
Subject: Re: [e1000 2.6 10/11] TxDescriptors -> 1024 default
Date: Thu, 11 Sep 2003 15:18:05 -0400 [thread overview]
Message-ID: <3F60CA6D.9090503@pobox.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0309081953510.1261-100000@localhost.localdomain>
Feldman, Scott wrote:
> * Change the default number of Tx descriptors from 256 to 1024.
> Data from [ricardoz@us.ibm.com] shows it's easy to overrun
> the Tx desc queue.
All e1000 patches applied except this one.
Of _course_ it's easy to overrun the Tx desc queue. That's why we have
a TX queue sitting on top of the NIC's hardware queue. And TCP socket
buffers on top of that. And similar things.
Descriptor increases like this are usually the result of some sillyhead
blasting out UDP packets, and then wondering why he sees packet loss on
the local computer (the "blast out packets" side).
You're just wasting memory.
Jeff
next prev parent reply other threads:[~2003-09-11 19:18 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-09-09 3:14 [e1000 2.6 10/11] TxDescriptors -> 1024 default Feldman, Scott
2003-09-11 19:18 ` Jeff Garzik [this message]
2003-09-11 19:45 ` Ben Greear
2003-09-11 19:59 ` Jeff Garzik
2003-09-11 20:12 ` David S. Miller
2003-09-11 20:40 ` Ben Greear
2003-09-11 21:07 ` David S. Miller
2003-09-11 21:29 ` Ben Greear
2003-09-11 21:29 ` David S. Miller
2003-09-11 21:47 ` Ricardo C Gonzalez
2003-09-11 22:00 ` Jeff Garzik
2003-09-11 22:15 ` Ben Greear
2003-09-11 23:02 ` David S. Miller
2003-09-11 23:22 ` Ben Greear
2003-09-11 23:29 ` David S. Miller
2003-09-12 1:34 ` jamal
2003-09-12 2:20 ` Ricardo C Gonzalez
2003-09-12 3:05 ` jamal
2003-09-13 3:49 ` David S. Miller
2003-09-13 11:52 ` Robert Olsson
2003-09-15 12:12 ` jamal
2003-09-15 13:45 ` Robert Olsson
2003-09-15 23:15 ` David S. Miller
2003-09-16 9:28 ` Robert Olsson
2003-09-14 19:08 ` Ricardo C Gonzalez
2003-09-15 2:50 ` David Brownell
2003-09-15 8:17 ` David S. Miller
2004-05-15 12:14 ` TxDescriptors -> 1024 default. Please not for every NIC! Marc Herbert
2004-05-19 9:30 ` Marc Herbert
2004-05-19 10:27 ` Pekka Pietikainen
2004-05-20 14:11 ` Luis R. Rodriguez
2004-05-20 16:38 ` [Prism54-devel] " Jean Tourrilhes
2004-05-20 16:45 ` Tomasz Torcz
2004-05-20 17:13 ` zero copy TX in benchmarks was " Andi Kleen
2004-05-19 11:54 ` Andi Kleen
[not found] <3F60DE5B.1010700@pobox.com>
2003-09-11 21:27 ` [e1000 2.6 10/11] TxDescriptors -> 1024 default Ricardo C Gonzalez
-- strict thread matches above, loose matches on Subject: below --
2003-09-12 5:13 Feldman, Scott
2003-09-12 12:44 ` jamal
2003-09-12 15:29 ` Donald Becker
2003-09-12 17:44 ` Ricardo C Gonzalez
2003-09-15 11:37 ` jamal
2003-09-12 18:12 ` Ben Greear
2003-09-12 18:31 ` Ricardo C Gonzalez
2003-09-15 11:29 ` jamal
[not found] <Pine.LNX.4.58.0405141430340.4622@fcat>
2004-05-18 14:34 ` Ricardo C Gonzalez
2004-06-02 19:11 ` Marc Herbert
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