From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wm0-x22d.google.com (mail-wm0-x22d.google.com [IPv6:2a00:1450:400c:c09::22d]) (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 76E2F3CB3D for ; Wed, 11 Apr 2018 12:03:46 -0400 (EDT) Received: by mail-wm0-x22d.google.com with SMTP id t67so5333047wmt.0 for ; Wed, 11 Apr 2018 09:03:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=eventide.io; s=google; h=mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=ok53Z1rDHaUk1UFybcg8EwaybjUnnyICwYJyPXztLKk=; b=g1IwYEAY5GZ3IxTJ/ewouzqOQX+IBNHIrzdzm/0ji9HltzzBaBRImIm/THV8qwOzKF WEFFEGfEeB3cAypO2ZSIM2M3u+WaCZdasxrlIk/6bA2F7sd8MOYtrnO8PiaFnqqXgzgp MNAkY5hg5MC+pGp7cAu2R+2UMV3E2ewYHgk/8Y9IW0itHcz2yh3M9HrtY5g9GiFLQnFe H4Kvk2Rmi+vhJDHKH0g9pVQ/d36aWuyh99qnE9/Qwde4IgO77OVel4u2NZZpieo6PVOE 2lWBHg1LKzD9OkCpMtAZwENkZgkvysWZbGTmQbYnqEltKFAnHL2kfTlDPf1MVXaaglSs evaA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=ok53Z1rDHaUk1UFybcg8EwaybjUnnyICwYJyPXztLKk=; b=O0Tj5xqFw0lO5vkzrHtlQBbGQyt+z2naSlcgsNGn/o49EMiyuYKNzLuLIR6P6esKKn wWFoxPXoxMrr/Hnb0ObKco7uFPthkhsZDnKm495cH1OdxsC1Mp+HcTKyxz27LfmS0FLs yYimbwFizdbiKHsoJI7MrZM0pD+MuJE4JZieSdyymCMISkv3eOGVwJTykTMmKROZp0GL 8vrbxyWxUWkqzSGhauWuZivv4bGSrY/cHEbb/F4RXms1nAEX5lvUEKBTfoWtXLRXLiHC K6Xc53R8519i/p/+APt3McNJ68D7JeqMlevQQMC3AgucO8dF2GoxB7mH0QbFAz+trNRw JvQw== X-Gm-Message-State: ALQs6tCsc5kH9gp1dmM+/OkkKEzdZR+lc0z4xH1dAS83eq3mv1j9v6bs 0WSpIk/FHBSRNuzfnsMtUrEnk9GrTJU= X-Google-Smtp-Source: AIpwx4/QtcgoLD4Y4zGUgN5cLhWV/nO0t82C0C9qsRn1MuAMXhCbpaDPgLBAerwVzWaYyCMtj+/3QQ== X-Received: by 10.28.69.93 with SMTP id s90mr2970889wma.71.1523462625489; Wed, 11 Apr 2018 09:03:45 -0700 (PDT) Received: from tron.luk.eventide.io (h-1169.lbcfree.net. [185.193.85.130]) by smtp.gmail.com with ESMTPSA id 185sm2215532wmj.46.2018.04.11.09.03.44 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 11 Apr 2018 09:03:44 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 9.3 \(3124\)) From: Pete Heist In-Reply-To: <87in8xahqp.fsf@toke.dk> Date: Wed, 11 Apr 2018 18:03:43 +0200 Cc: cake@lists.bufferbloat.net Content-Transfer-Encoding: quoted-printable Message-Id: References: <87in8xahqp.fsf@toke.dk> To: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= X-Mailer: Apple Mail (2.3124) Subject: Re: [Cake] Cake not more CPU efficient than HTB+FQ-CoDel (anymore)? X-BeenThere: cake@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: Cake - FQ_codel the next generation List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 11 Apr 2018 16:03:46 -0000 For what it=E2=80=99s worth, that=E2=80=99s what I also saw testing Cake = on the APU2 late last year, and the ER-X platform earlier. I actually = never knew that Cake used less CPU at some point. Sorry for no = supporting detail... :) Pete > On Apr 11, 2018, at 5:24 PM, Toke H=C3=B8iland-J=C3=B8rgensen = wrote: >=20 > So we've been saying that one of the benefits of Cake is less CPU = usage; > but while trying to benchmark this I got results that would seem to > indicate the opposite. >=20 > See attached graph + data files. Basically, I setup a shaper on an > Archer C7 with sqm-scripts simplest.qos. Both HTB+FQ-CoDel and Cake > manages to shape at 250 Mbps, where Cake even shows a bit lower = latency. > That is good. >=20 > However, when I change the configuration to 400 Mbps (more than the > Archer CPU can handle), Cake tops out at ~260 Mbps, while HTB+FQ-CoDel > manages ~305 Mbps and a slightly lower latency. In both cases I see = the > characteristic 95% sirq CPU usage in 'top' on the Archer while the = test > is running. >=20 > So, um, did we cram so many features into Cake that it no longer uses > less CPU? Can anyone confirm these results? >=20 > The tests were run on an openwrt nightly image from today, which has = the > latest Cake version from the Cobalt branch. >=20 >=20 > -Toke >=20 > = = ______________________________= _________________ > Cake mailing list > Cake@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/cake