From: Stephen Hemminger <stephen@networkplumber.org>
To: David Miller <davem@davemloft.net>
Cc: ncardwell@google.com, eric.dumazet@gmail.com,
dave.taht@bufferbloat.net, netdev@vger.kernel.org
Subject: Re: 16% regression on 10G caused by TCP small queues
Date: Wed, 23 Oct 2013 21:45:57 -0700 [thread overview]
Message-ID: <20131023214557.386aad1a@nehalam.linuxnetplumber.net> (raw)
In-Reply-To: <20131023.233816.1396918839771657154.davem@davemloft.net>
On Wed, 23 Oct 2013 23:38:16 -0400 (EDT)
David Miller <davem@davemloft.net> wrote:
> From: Stephen Hemminger <stephen@networkplumber.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@google.com>
Date: Tue Aug 27 05:46:32 2013 -0700
tcp: TSO packets automatic sizing
commit c9eeec26e32e087359160406f96e0949b3cc6f10
Author: Eric Dumazet <edumazet@google.com>
Date: Fri Sep 27 03:28:54 2013 -0700
tcp: TSQ can use a dynamic limit
next prev parent reply other threads:[~2013-10-24 4:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-10-24 2:29 16% regression on 10G caused by TCP small queues Stephen Hemminger
2013-10-24 2:37 ` Neal Cardwell
2013-10-24 3:09 ` Stephen Hemminger
2013-10-24 3:38 ` David Miller
2013-10-24 4:45 ` Stephen Hemminger [this message]
2013-10-24 6:05 ` Eric Dumazet
2013-10-24 6:10 ` Eric Dumazet
2013-10-24 6:19 ` Eric Dumazet
2013-10-24 7:01 ` David Miller
2013-10-27 4:33 ` Dave Taht
2013-10-27 5:07 ` David Miller
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