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Date: Wed, 23 Oct 2013 23:05:33 -0700
From: Eric Dumazet <eric.dumazet@...il.com>
To: Stephen Hemminger <stephen@...workplumber.org>
Cc: David Miller <davem@...emloft.net>, ncardwell@...gle.com,
dave.taht@...ferbloat.net, netdev@...r.kernel.org
Subject: Re: 16% regression on 10G caused by TCP small queues
On Wed, 2013-10-23 at 21:45 -0700, Stephen Hemminger wrote:
> On Wed, 23 Oct 2013 23:38:16 -0400 (EDT)
> David Miller <davem@...emloft.net> wrote:
>
> > From: Stephen Hemminger <stephen@...workplumber.org>
> > Date: Wed, 23 Oct 2013 20:09:49 -0700
> >
> > > I will check 3.12, but what about users on 3.10 which is the LTS
> > > kernel used by most distros?
>
> 3.12-rc6 gets line rate again (9.41 Gbit/sec)
>
> > The fix will be backported to -stable, relax Stephen.
>
> Sorry, thought sk_pacing_rate depended on FQ qdisc but it is other way around.
> In which case doing merge of these two was sufficient to fix the problem.
> With a minor manual fix up to tcp.h.
>
>
> commit 95bd09eb27507691520d39ee1044d6ad831c1168
> Author: Eric Dumazet <edumazet@...gle.com>
> Date: Tue Aug 27 05:46:32 2013 -0700
>
> tcp: TSO packets automatic sizing
>
> commit c9eeec26e32e087359160406f96e0949b3cc6f10
> Author: Eric Dumazet <edumazet@...gle.com>
> Date: Fri Sep 27 03:28:54 2013 -0700
>
> tcp: TSQ can use a dynamic limit
Perfect, thanks for testing Stephen !
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