From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pg0-x241.google.com (mail-pg0-x241.google.com [IPv6:2607:f8b0:400e:c05::241]) (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 27C203B2A0 for ; Sat, 3 Dec 2016 18:24:32 -0500 (EST) Received: by mail-pg0-x241.google.com with SMTP id x23so11867337pgx.3 for ; Sat, 03 Dec 2016 15:24:32 -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=X1KG7e0Nyrwc2aJiDmfbfZlHSudKQh47MXFqEKmkM8Q=; b=Ch6NFS67GUUtYWNt4qCbxeM1jloG7Xwu4TxDs2BDY3kV7TQBrCovqfwTF+iAl/kP0O d9H4jWut7IfAKZeqwvv2GRTD16di4qEvbbnkm6aMPz4NQ+g+HesHFyGCyPor26qLu9bL 3DTQt7ifrn44YuJM1E0yh6SD1I7fDZDbvOHPaFXoMz7skCsbqWDwc3nj2D/Lt6/mEXPR 0n3EsCGVGaof5Wdk15iE0uh2ROdHhkoEIOMAcyLqE+ymzxJVJQlgM29LAOgxks0Mz04i IYX4kkjahIkPVjs+1fd7sDDCtI/qaz9b67iWNRtPZuygs+L0IMS0swR7SUXxUn7GzIVJ YuUw== 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=X1KG7e0Nyrwc2aJiDmfbfZlHSudKQh47MXFqEKmkM8Q=; b=do0gL5ZeZmzQysTreRAEEuojmHN/6jyA0RNGqox6Q60Q44LKoyeW5AQnjQZUouKhh3 6D+akJavcufNSri3YZitEvSQWOlIRO/lyRbt4a7lajt8fgpR0gBLpwB9zsJT+49tqp9s hhoI34Ws6Rv9lIEeEFciQeW8nNFWf2qVhQpagjqwUp4bOejK4/fqm8lSKcrdCiUevFuk VBzowPdBMoOPX3Q7hOMqp6T03ZN0OgB+UePBa9lN4Q1UxWibadAb3hn5o21rJg9g8Gld 4z7sYkaw5nbIjydpA8WAqp1qSn/mwZt++uAcWNXCgG69ELZHq8mc9xSQsCZ41aIldH/Q JGpg== X-Gm-Message-State: AKaTC03mG3NIJIFCaq3TvepUBIO5QT29hp4V5ge93bfm8O1uTDv4mfPZYA3qBT6OKpF1xQ== X-Received: by 10.99.103.1 with SMTP id b1mr91822507pgc.58.1480807470183; Sat, 03 Dec 2016 15:24:30 -0800 (PST) Received: from [172.19.250.57] ([172.19.250.57]) by smtp.googlemail.com with ESMTPSA id n25sm17149213pfi.33.2016.12.03.15.24.29 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 03 Dec 2016 15:24:29 -0800 (PST) Message-ID: <1480807468.18162.436.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 15:24:28 -0800 In-Reply-To: <1480806940.18162.434.camel@edumazet-glaptop3.roam.corp.google.com> References: <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> <1480805737.18162.425.camel@edumazet-glaptop3.roam.corp.google.com> <20161203230335.GA40411@sesse.net> <1480806940.18162.434.camel@edumazet-glaptop3.roam.corp.google.com> 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 23:24:32 -0000 On Sat, 2016-12-03 at 15:15 -0800, Eric Dumazet wrote: > 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 ! Wait a minute. If you use fq on the receiver, then maybe your old debian kernel did not backport : https://git.kernel.org/cgit/linux/kernel/git/davem/net.git/commit/?id=9878196578286c5ed494778ada01da094377a686