From: Eric Dumazet <eric.dumazet@gmail.com>
To: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Cc: Jonathan Morton <chromatix99@gmail.com>,
Neal Cardwell <ncardwell@google.com>,
"aqm@ietf.org" <aqm@ietf.org>,
bloat <bloat@lists.bufferbloat.net>
Subject: Re: [Bloat] TCP BBR paper is now generally available
Date: Sat, 03 Dec 2016 15:15:40 -0800 [thread overview]
Message-ID: <1480806940.18162.434.camel@edumazet-glaptop3.roam.corp.google.com> (raw)
In-Reply-To: <20161203230335.GA40411@sesse.net>
On Sun, 2016-12-04 at 00:03 +0100, Steinar H. Gunderson wrote:
> On Sat, Dec 03, 2016 at 02:55:37PM -0800, Eric Dumazet wrote:
> > Note that starting from linux-4.4, e1000e gets gro_flush_timeout that
> > would help this precise workload
> >
> > https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=32b3e08fff60494cd1d281a39b51583edfd2b18f
> >
> > Maybe you can redo the experiment in ~5 years when distro catches up ;)
>
> I can always find a backport, assuming the IPMI is still working. But it
> really wasn't like this earlier :-) Perhaps something changed on the path,
> unrelated to BBR.
If the tcpdump is taken on receiver, how would you explain these gaps ?
Like the NIC was frozen for 40 ms !
11:14:06.023821 IP6 C > S: Flags [.], ack 368888520, win 23422, options [nop,nop,TS val 864457007 ecr 3498315976], length 0
11:14:06.023823 IP6 C > S: Flags [.], ack 368891028, win 23430, options [nop,nop,TS val 864457007 ecr 3498315976], length 0
11:14:06.023829 IP6 C > S: Flags [.], ack 368899248, win 23407, options [nop,nop,TS val 864457007 ecr 3498315976], length 0
11:14:06.023834 IP6 C > S: Flags [.], ack 368907468, win 23415, options [nop,nop,TS val 864457007 ecr 3498315976], length 0
11:14:06.023835 IP6 C > S: Flags [.], ack 368915688, win 23392, options [nop,nop,TS val 864457007 ecr 3498315976], length 0
<gap : Not tsval is still 864457007 >
11:14:06.062751 IP6 C > S: Flags [.], ack 368923908, win 23415, options [nop,nop,TS val 864457007 ecr 3498315977], length 0
11:14:06.062767 IP6 C > S: Flags [.], ack 368929620, win 23400, options [nop,nop,TS val 864457007 ecr 3498315977], length 0
11:14:06.062770 IP6 C > S: Flags [.], ack 368932128, win 23430, options [nop,nop,TS val 864457007 ecr 3498315977], length 0
11:14:06.062771 IP6 C > S: Flags [.], ack 368943204, win 23400, options [nop,nop,TS val 864457007 ecr 3498315977], length 0
11:14:06.062773 IP6 C > S: Flags [.], ack 368948568, win 23422, options [nop,nop,TS val 864457008 ecr 3498315977], length 0
11:14:06.062775 IP6 C > S: Flags [.], ack 368956788, win 23400, options [nop,nop,TS val 864457008 ecr 3498315977], length 0
11:14:06.062776 IP6 C > S: Flags [.], ack 368965008, win 23415, options [nop,nop,TS val 864457008 ecr 3498315977], length 0
11:14:06.062778 IP6 C > S: Flags [.], ack 368976084, win 23385, options [nop,nop,TS val 864457008 ecr 3498315977], length 0
next prev parent reply other threads:[~2016-12-03 23:15 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-02 15:52 Dave Taht
2016-12-02 19:15 ` Aaron Wood
2016-12-02 20:32 ` Jonathan Morton
2016-12-02 22:22 ` Neal Cardwell
2016-12-02 22:40 ` Steinar H. Gunderson
2016-12-02 23:31 ` Eric Dumazet
2016-12-03 13:03 ` Neal Cardwell
2016-12-03 19:13 ` Steinar H. Gunderson
2016-12-03 20:20 ` Eric Dumazet
2016-12-03 20:26 ` Jonathan Morton
2016-12-03 21:07 ` Eric Dumazet
2016-12-03 21:34 ` Steinar H. Gunderson
2016-12-03 21:50 ` Eric Dumazet
2016-12-03 22:13 ` Steinar H. Gunderson
2016-12-03 22:55 ` Eric Dumazet
2016-12-03 23:02 ` Eric Dumazet
2016-12-03 23:09 ` Eric Dumazet
2016-12-03 23:03 ` Steinar H. Gunderson
2016-12-03 23:15 ` Eric Dumazet [this message]
2016-12-03 23:24 ` Eric Dumazet
2016-12-04 3:18 ` Neal Cardwell
2016-12-04 8:44 ` Steinar H. Gunderson
2016-12-04 17:13 ` Eric Dumazet
2016-12-04 17:38 ` Steinar H. Gunderson
2016-12-06 17:20 ` Steinar H. Gunderson
2016-12-06 21:31 ` Neal Cardwell
2016-12-03 21:38 ` Jonathan Morton
2016-12-03 21:33 ` Steinar H. Gunderson
2016-12-07 16:28 ` Alan Jenkins
2016-12-07 16:47 ` Steinar H. Gunderson
2016-12-07 17:03 ` Alan Jenkins
2016-12-08 8:24 ` Mikael Abrahamsson
2016-12-08 13:22 ` Dave Täht
2016-12-08 14:01 ` Mikael Abrahamsson
2016-12-08 21:29 ` Neal Cardwell
2016-12-08 22:31 ` Yuchung Cheng
2016-12-09 14:52 ` Klatsky, Carl
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