netdev - Re: Extremely bad performance with RTL8111/8168B

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Date:	Mon, 08 Jul 2013 06:47:49 -0700
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	nic_swsd@...ltek.com, romieu@...zoreil.com, netdev@...r.kernel.org
Subject: Re: Extremely bad performance with RTL8111/8168B

On Mon, 2013-07-08 at 11:54 +0200, Pavel Machek wrote:
> Hi!
> 
> I've small Intel desktop with RTL8111/8168B ethernet... but the
> performance is extremely bad.
> 
> In 3.10, I only get about 200KB/sec:
> 
> pavel@amd:~$ scp /tmp/delme pavel@duo:/tmp
> pavel@...'s password: 
> delme                                               100%   16MB
> 236.0KB/s   01:09    
> 
> In older version, I get 1MB/s, but network fails every 10 minutes or
> so. Card is:
> 
> 03:00.0 Ethernet controller: Realtek Semiconductor Co.,
> Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 03)
> 
> I did install firmware-realtek package as suggested by debian
> installer.
> 
> Dmesg says:
> 
> r8169 Gigabit Ethernet driver 2.3LK-NAPI loaded
> r8169 0000:03:00.0 eth0: RTL8168d/8111d at 0xf8010000,
> 00:27:0e:2a:43:71, XID 081000c0 IRQ 17
> r8169 0000:03:00.0 eth0: jumbo features [frames: 9200 bytes, tx
> checksumming: ko]
> 
> Any ideas what is wrong?

Hi Pavel

I guess receiving is OK ?

It looks like TSO packets are not transmitted, so TCP only 'works'
because retransmits use non TSO packets.

Could you report "ethtool -k eth0" ?

try : ethtool -K eth0 tso off



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