From: Eric Dumazet <eric.dumazet@gmail.com>
To: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Cc: bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] "BBR" TCP patches submitted to linux kernel
Date: Fri, 21 Oct 2016 03:52:24 -0700 [thread overview]
Message-ID: <1477047144.7065.45.camel@edumazet-glaptop3.roam.corp.google.com> (raw)
In-Reply-To: <20161021104217.GA35316@sesse.net>
On Fri, 2016-10-21 at 12:42 +0200, Steinar H. Gunderson wrote:
> On Fri, Oct 21, 2016 at 03:28:01AM -0700, Eric Dumazet wrote:
> > Could you provide /proc/sys/net/ipv4/tcp_rmem
> > and /proc/sys/net/ipv4/tcp_wmem values on your server ?
>
> I see I have old sysctl.conf settings here, from tuning way back in the 2.6
> era:
>
> net/core/rmem_max = 8738140
> net/core/wmem_max = 8738140
>
> net/ipv4/tcp_rmem = 4096 873814 8738140
> net/ipv4/tcp_wmem = 4096 873814 8738140
>
> Perhaps it's time to kill them, but I don't know what the defaults are :-)
>
> > What is the rtt between your two hosts ?
>
> 35.7–36.0 ms.
>
> /* Steinar */
Ok, you could try 12 MB instead of 8MB to eventually reach line rate.
net/ipv4/tcp_rmem = 4096 873814 12000000
net/ipv4/tcp_wmem = 4096 873814 12000000
next prev parent reply other threads:[~2016-10-21 10:52 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-16 21:04 Dave Taht
2016-09-16 21:11 ` Steinar H. Gunderson
2016-09-16 21:14 ` Eric Dumazet
2016-09-16 22:29 ` Dave Taht
2016-09-29 11:24 ` Mário Sérgio Fujikawa Ferreira
2016-09-29 19:43 ` Dave Täht
2016-09-29 20:35 ` Aaron Wood
2016-09-30 8:12 ` Mikael Abrahamsson
2016-09-30 14:16 ` Aaron Wood
2016-09-29 21:23 ` Steinar H. Gunderson
2016-09-30 1:54 ` Mario Ferreira
2016-09-30 3:50 ` Dave Täht
2016-09-30 4:29 ` Aaron Wood
2016-09-29 23:26 ` Benjamin Cronce
2016-09-30 1:58 ` Mario Ferreira
2016-10-21 8:47 ` Steinar H. Gunderson
2016-10-21 10:28 ` Eric Dumazet
2016-10-21 10:42 ` Steinar H. Gunderson
2016-10-21 10:47 ` Steinar H. Gunderson
2016-10-21 10:55 ` Eric Dumazet
2016-10-21 10:52 ` Eric Dumazet [this message]
2016-10-21 11:03 ` Steinar H. Gunderson
2016-10-21 11:40 ` Eric Dumazet
2016-10-21 11:45 ` Steinar H. Gunderson
2016-10-27 17:04 ` Steinar H. Gunderson
2016-10-27 17:31 ` Eric Dumazet
2016-10-27 17:33 ` Dave Taht
2016-10-27 17:52 ` Eric Dumazet
2016-10-27 17:59 ` Dave Taht
2016-10-27 17:57 ` Yuchung Cheng
2016-10-27 18:14 ` Dave Taht
2016-10-27 21:30 ` [Bloat] [bbr-dev] " Yuchung Cheng
2016-11-01 23:13 ` Yuchung Cheng
2016-11-01 23:49 ` Jonathan Morton
2016-11-02 9:27 ` Mikael Abrahamsson
2016-11-02 17:21 ` Klatsky, Carl
2016-11-02 18:48 ` Dave Täht
2016-11-25 12:51 ` [Bloat] " Bernd Paysan
2016-10-21 10:50 ` Zhen Cao
2016-10-27 19:25 Ingemar Johansson S
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