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

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Date:	Tue, 9 Jul 2013 00:01:49 +0200
From:	Francois Romieu <romieu@...zoreil.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	Pavel Machek <pavel@....cz>, Hayes Wang <hayeswang@...ltek.com>,
	netdev@...r.kernel.org
Subject: Re: Extremely bad performance with RTL8111/8168B

Eric Dumazet <eric.dumazet@...il.com> :
[8168d failure]
> 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

If so it could be worth adding a test for RTL_GIGA_MAC_VER_25 in
rtl_test_hw_pad_bug as has been done for RTL_GIGA_MAC_VER_34 (see
b423e9ae49d78ea3f53b131c8d5a6087aed16fd6).

1a9646497b163a8b9da5e70008d809dc91b32855 may be reverted if
'ethtool -K eth0 tso off' does not make a difference.

-- 
Ueimor
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