From: Stephen Hemminger <shemminger@osdl.org>
To: linux-kernel@vger.kernel.org
Subject: Re: 2.6.10 TCP troubles
Date: Wed, 5 Jan 2005 15:33:07 -0800 [thread overview]
Message-ID: <20050105153307.739ef5d8@dxpl.pdx.osdl.net> (raw)
In-Reply-To: <05081I514@server5.heliogroup.fr>
On Wed, 05 Jan 2005 08:13:17 GMT
Hubert Tonneau <hubert.tonneau@fullpliant.org> wrote:
> Here is the senario:
> the Linux machine is writting through libsmbclient
> to an OSX machine running Samba
>
> Switching the Linux machine from 2.6.8 to 2.6.10 made the network speed
> drop drastically: 20 seconds with 2.6.8, 800 seconds with 2.6.10
>
> -
> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
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> Please read the FAQ at http://www.tux.org/lkml/
Some possiblities:
2.6.8 still had the broken TCP segmentation offload that didn't obey
congestion/slow start. Are you using hardware that supports TSO?
Does 2.6.8 behaviour change if you turn TSO off with ethtool?
Is there window scaling or other issues? Does 2.6.10 get faster if
you turn of window scaling sys.net.ipv4.tcp_window_scaling=0?
Is there a window scale corrupting firewall (like OpenBSD pf)
in the way?
Is there more packet loss on the router or the Mac?
next prev parent reply other threads:[~2005-01-05 23:34 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-05 8:13 Hubert Tonneau
2005-01-05 12:07 ` Francois Romieu
2005-01-05 23:33 ` Stephen Hemminger [this message]
2005-01-05 23:51 ` Francois Romieu
2005-01-05 12:50 Hubert Tonneau
2005-01-05 14:04 ` Alan Cox
2005-01-05 15:41 ` Barry K. Nathan
2005-01-05 18:44 ` Francois Romieu
2005-01-05 15:14 Hubert Tonneau
2005-01-05 15:30 Hubert Tonneau
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