From: Lennert Buytenhek <buytenh@wantstofly.org>
To: Arjan van de Ven <arjan@infradead.org>
Cc: "Michael S. Tsirkin" <mst@mellanox.co.il>,
"David S. Miller" <davem@davemloft.net>,
rick.jones2@hp.com, netdev@vger.kernel.org, rdreier@cisco.com,
linux-kernel@vger.kernel.org, openib-general@openib.org
Subject: Re: TSO and IPoIB performance degradation
Date: Mon, 20 Mar 2006 12:49:33 +0100 [thread overview]
Message-ID: <20060320114933.GA3058@xi.wantstofly.org> (raw)
In-Reply-To: <1142855223.3114.30.camel@laptopd505.fenrus.org>
On Mon, Mar 20, 2006 at 12:47:03PM +0100, Arjan van de Ven wrote:
> > > I disagree with Linux changing it's behavior. It would be great to
> > > turn off congestion control completely over local gigabit networks,
> > > but that isn't determinable in any way, so we don't do that.
> >
> > Interesting. Would it make sense to make it another tunable knob in
> > /proc, sysfs or sysctl then?
>
> that's not the right level; since that is per interface. And you only
> know the actual interface waay too late (as per earlier posts).
> Per socket.. maybe
> But then again it's not impossible to have packets for one socket go out
> to multiple interfaces
> (think load balancing bonding over 2 interfaces, one IB another
> ethernet)
I read it as if he was proposing to have a sysctl knob to turn off
TCP congestion control completely (which has so many issues it's not
even funny.)
next prev parent reply other threads:[~2006-03-20 11:49 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <OF336D72E6.999D2A30-ON8725712A.00117C92-8825712A.00116629@us.ibm.com>
2006-03-07 21:44 ` [openib-general] " Matt Leininger
2006-03-07 21:49 ` Stephen Hemminger
2006-03-07 21:53 ` Michael S. Tsirkin
2006-03-08 0:11 ` Matt Leininger
2006-03-08 0:18 ` David S. Miller
2006-03-08 1:17 ` Roland Dreier
2006-03-08 1:23 ` David S. Miller
2006-03-08 1:34 ` Roland Dreier
2006-03-08 12:53 ` Michael S. Tsirkin
2006-03-08 20:53 ` David S. Miller
2006-03-09 23:48 ` David S. Miller
2006-03-10 0:10 ` Michael S. Tsirkin
2006-03-10 0:38 ` Michael S. Tsirkin
2006-03-10 7:18 ` David S. Miller
2006-03-10 0:21 ` Rick Jones
2006-03-10 7:23 ` David S. Miller
2006-03-10 17:44 ` Rick Jones
2006-03-20 9:06 ` Michael S. Tsirkin
2006-03-20 9:55 ` David S. Miller
2006-03-20 10:22 ` Michael S. Tsirkin
2006-03-20 10:37 ` David S. Miller
2006-03-20 11:27 ` Michael S. Tsirkin
2006-03-20 11:47 ` Arjan van de Ven
2006-03-20 11:49 ` Lennert Buytenhek [this message]
2006-03-20 11:53 ` Arjan van de Ven
2006-03-20 13:35 ` Michael S. Tsirkin
2006-03-20 12:04 ` Michael S. Tsirkin
2006-03-20 15:09 ` Benjamin LaHaise
2006-03-20 18:58 ` Rick Jones
2006-03-20 23:00 ` David S. Miller
2006-04-27 4:13 ` Troy Benjegerdes
2006-03-06 22:34 Michael S. Tsirkin
2006-03-06 22:40 ` David S. Miller
2006-03-06 22:50 ` Stephen Hemminger
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