From: Dave Taht <dave.taht@gmail.com>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Gabor Juhos <juhosg@openwrt.org>, bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] tiny monsters: multicast packets
Date: Sun, 29 May 2011 11:02:31 -0600 [thread overview]
Message-ID: <BANLkTik38WSqz5jRSS1OB-k+pgBWwEmjgw@mail.gmail.com> (raw)
In-Reply-To: <1306686801.30021.14.camel@edumazet-laptop>
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On Sun, May 29, 2011 at 10:33 AM, Eric Dumazet <eric.dumazet@gmail.com>wrote:
> Le dimanche 29 mai 2011 à 10:07 -0600, Dave Taht a écrit :
> >
> >
> > On Sun, May 29, 2011 at 9:51 AM, Juliusz Chroboczek
> > <jch@pps.jussieu.fr> wrote:
> > >> Are you seeing high CPU load in interrupt context? (Run
> > top.)
> >
> > > Yes. 99% sirq.
> >
> >
> > Could be due to a simplistic Ethernet driver. If you have the
> > time and
> > energy, you may want to ask on dev.openwrt.org.
> >
> > I will have some energy and time, shortly.
> >
> > That said, several great openwrt people are on this list, and may be
> > able to weigh in.
> >
> > I'm glad that the limit of about 130Mbit on the ethernet side for gigE
> > could be mitigated with a better driver. (and that said, 130Mbit is
> > "good enough" for most of the world)
> >
>
> Hmm, 130 Mbits sound very low. What linux version is it, and what the
> driver is exactly, so that I take a look ?
>
>
>
The ethernet driver is the ag71xx driver as present in the wndr3700v2 (and
mucho related atheros hardware). Regrettably so far as I can tell, this one
is out of tree, and is incorporated in the openwrt build via a string of
patches.
https://dev.openwrt.org/browser/trunk/target/linux/ar71xx/files/drivers/net/ag71xx
I think.
Gabor sent patches for it to me for ethtool that I have not yet tried.
The kernel being used in capetown[1] is 2.6.37.6. - patched forward from
2.6.39 for the pfifo ecn bug, the ipv6 ecn bug, and several other
bufferbloat related things like sfb...
1: http://www.bufferbloat.net/projects/bismark/wiki/Capetown
--
Dave Täht
SKYPE: davetaht
US Tel: 1-239-829-5608
http://the-edge.blogspot.com
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next prev parent reply other threads:[~2011-05-29 16:46 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-29 13:23 Dave Taht
2011-05-29 14:10 ` Jonathan Morton
2011-05-29 15:10 ` Dave Taht
2011-05-29 15:33 ` Juliusz Chroboczek
2011-05-29 15:44 ` Dave Taht
2011-05-29 15:51 ` Juliusz Chroboczek
2011-05-29 16:07 ` Dave Taht
2011-05-29 16:07 ` Dave Taht
2011-05-29 16:53 ` Dave Taht
2011-05-29 16:33 ` Eric Dumazet
2011-05-29 17:02 ` Dave Taht [this message]
2011-05-29 17:17 ` Eric Dumazet
2011-05-29 17:40 ` Dave Taht
2011-05-29 17:47 ` Jonathan Morton
2011-05-29 19:14 ` Eric Dumazet
2011-05-29 15:21 ` Juliusz Chroboczek
2011-05-29 15:57 ` Dave Taht
2011-05-31 14:58 ` Jim Gettys
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