From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-x244.google.com (mail-pg0-x244.google.com [IPv6:2607:f8b0:400e:c05::244]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 251C23B2A0 for ; Sat, 3 Dec 2016 17:55:41 -0500 (EST) Received: by mail-pg0-x244.google.com with SMTP id 3so11826765pgd.0 for ; Sat, 03 Dec 2016 14:55:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:subject:from:to:cc:date:in-reply-to:references :mime-version:content-transfer-encoding; bh=YjVlAamGyV9BHvHSg69B+0bw+60q0dcC6Y1Lwnb+ReY=; b=cJ+bKubRnpacQ8qWExg13YZp4wG0qcS6rVFo1EM2XdnnKz8tPU1GZRoTE+C2wJ8njy txm6RdeOzy86k0G/Cps8XasUwJYG1FNT8hE76yQ1vX4PYGcQXKa9JIBLzt/6ats8oonK LkF3GvyMqCX7zwRvtPTxqXjuEXOLvFJw8v68SS7mhDNAmp3HlgcFZLj106aoAJJvmlct UkZK0xaL+Y7+3g0McFPHgkvAjKV+UzEfew6CyBxb/Is+ORaPPW+UoPbB0XAc10GG0ufz 0bG1fNQeozpyGN6H+qsCWzaIrv/6i8i6et2sKuZOrJmerImpFTRY24e7OBUFXHdXpfjp 7lwg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to :references:mime-version:content-transfer-encoding; bh=YjVlAamGyV9BHvHSg69B+0bw+60q0dcC6Y1Lwnb+ReY=; b=mVwUBmQPCtFMaH9Cx9er1upY5HECeKVYwOnzXOKj7M1TZ4NzUBedPWDr5QkcsAttjD ZFPWzNZPIe7IcVqF7mSH0uL1NuW5HYjbaAxJEwPNWZe9IvZQpnXHmykmxqEbUfLatquk gRpCjGmLiApru0OfYmvB0jWdEqmF9su1USI5CA/3cIht1AWPb9svHZqPHt01e389liHy CrXwKR1twDhM2XMxCOVpsQuAerTH2nqlbbdynPwzhLjjEhpbU0gZBMPnOrFdUrI7iNHM qBFXxeEGPdHEawk5g5qN3QH9Wu+r0shLTZ/g0FSXie1MvpJ1TFHszcVCCXqeAmf7ID1b F5GA== X-Gm-Message-State: AKaTC00mPgddCio2wvDTxBzn9/Gaq0J+VeuSai+/PrBU9zdWFREv6XTVFkBBtZQQ+dayng== X-Received: by 10.84.139.129 with SMTP id 1mr112080113plr.178.1480805740298; Sat, 03 Dec 2016 14:55:40 -0800 (PST) Received: from [172.19.250.57] ([172.19.250.57]) by smtp.googlemail.com with ESMTPSA id u78sm11600651pfa.53.2016.12.03.14.55.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 03 Dec 2016 14:55:39 -0800 (PST) Message-ID: <1480805737.18162.425.camel@edumazet-glaptop3.roam.corp.google.com> From: Eric Dumazet To: "Steinar H. Gunderson" Cc: Jonathan Morton , Neal Cardwell , "aqm@ietf.org" , bloat Date: Sat, 03 Dec 2016 14:55:37 -0800 In-Reply-To: <20161203221338.GC38041@sesse.net> References: <20161202224006.GA5065@sesse.net> <1480721486.18162.392.camel@edumazet-glaptop3.roam.corp.google.com> <20161203191353.GA972@sesse.net> <1480796415.18162.408.camel@edumazet-glaptop3.roam.corp.google.com> <9A821B94-143B-446F-8852-2EB0158DD57C@gmail.com> <1480799260.18162.418.camel@edumazet-glaptop3.roam.corp.google.com> <20161203213428.GB38041@sesse.net> <1480801837.18162.419.camel@edumazet-glaptop3.roam.corp.google.com> <20161203221338.GC38041@sesse.net> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Subject: Re: [Bloat] TCP BBR paper is now generally available X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Dec 2016 22:55:41 -0000 On Sat, 2016-12-03 at 23:13 +0100, Steinar H. Gunderson wrote: > On Sat, Dec 03, 2016 at 01:50:37PM -0800, Eric Dumazet wrote: > >> Note, the tcpdump is done at the receiver. I don't know if this changes the > >> analysis. > > If you have access to the receiver, I would be interested to know > > NIC/driver used there ? > > root@blackhole:~# lspci | grep Ethernet > 01:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection > 02:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network Connection > > root@blackhole:~# lspci -n | grep 01:00.0 > 01:00.0 0200: 8086:10d3 > > root@blackhole:~# ls -l /sys/class/net/eth0/device/driver > lrwxrwxrwx 1 root root 0 des. 3 23:17 /sys/class/net/eth0/device/driver -> ../../../../bus/pci/drivers/e1000e > > root@blackhole:~# uname -a > Linux blackhole 3.16.0-4-amd64 #1 SMP Debian 3.16.36-1+deb8u2 (2016-10-19) x86_64 GNU/Linux > > Do note, both eth0 and eth1 are a bridge, although only one of the cards are > actually connected to anything (it's just so the remote hands can connect to > any port and things will come up fine). Perfect. 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 ;) Thanks.