From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qt0-x232.google.com (mail-qt0-x232.google.com [IPv6:2607:f8b0:400d:c0d::232]) (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 C42DC3B29E; Tue, 4 Sep 2018 17:16:39 -0400 (EDT) Received: by mail-qt0-x232.google.com with SMTP id t5-v6so5756280qtn.3; Tue, 04 Sep 2018 14:16:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :content-transfer-encoding; bh=4WodSIDWpLvgK8m2waRbpzL8xCCSf0I+mnN/xjK8IcY=; b=SpevMvfnn1Ydp0R9NBnq0rFmioh9d1j9YSutFYQGoiQP55jK7JCR905earQ61GrXzV 9XpHFmE/duXr3X/r77Xb3noy81S0erohA+YYjFzn7QOYCbQEfUvBaxylCnAO2R23+y4p ZLADSMLqnlCj91IUFyj1VIYGb/Nb/rOuf4c0z2V98o4cDS0OAX71sKNTiYFVPM2RDA7P tt7KnYwFw71JZLnbF2p/XoZv2Ht5KiqDl3jCdrbeqPiuOmZ2QWcRFkuRXnDoTHXFtU3R RPlfGusOsgNqk269mvrHzIxzUFxfbTybUImEO/3CPRP70ULVNJpfnkRAWyV9zS3lLqM6 843g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:content-transfer-encoding; bh=4WodSIDWpLvgK8m2waRbpzL8xCCSf0I+mnN/xjK8IcY=; b=ufBuxeJHqE2Garxepufy17QeOAj2OM552zwfS4mdAMiM5WtNlowuBMp8GbH65sqoDb KUllXAjXUWlUjBXPyz7S0z4cbC+Lg+J7RJK4mIMabsXMpUkYDbvUf7yaBbp+El+D+3aF 0Yze8o+ws6UlHKfhexdw1tafd6/msEMBx9VCHwQPnFesuwJ+droFvZYFl38dRa6nFAfX WC21rYYOfgCQI4nV7sv5qs4UlnAlWyhEVdRXANgOq1DWrSMPK8w875p+RnCsOtCJSGuU hLxzRRyzxExa+MSSydRoln085ttePhuM0iK4qog0crtc+xytrK5DMOyaUXQR3E6OooV1 mSCw== X-Gm-Message-State: APzg51BEpNSxoSRRuBhulag3EDiK7WPrEbi77WnQV5Qygw24/+8pkcHH BWNACrTdDq9pu2itXLLIk9hSfyq7yDRa6QrA8rjkGw== X-Google-Smtp-Source: ANB0Vda3LTpznRH26tMj6cwpPndTZ0Ds9dB4Wd2Z9tY386GKG9/l2UaLuIbsCCk/veUg/GJBFkZQkn5Cjdb8raLf1hU= X-Received: by 2002:ac8:2f43:: with SMTP id k3-v6mr9767064qta.163.1536095799011; Tue, 04 Sep 2018 14:16:39 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Tue, 4 Sep 2018 14:16:27 -0700 Message-ID: To: Cake List , cerowrt-devel@lists.bufferbloat.net Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [Cake] apu2 sqm/htb issue + a minor win for speeding up fq_codel itself 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: Tue, 04 Sep 2018 21:16:39 -0000 my guess is that burst and cburst should scale roughly as a function of the bytes that can fit into 1ms. On Tue, Sep 4, 2018 at 2:14 PM Dave Taht wrote: > > making htb's cburst and burst parameters 64k gets the APU2 up to > where it can shape 900mbits. 3 ksoftirq handlers start getting cpu > time, and we end up 54% idle to achiefe that. > > I should really go around running my own old code. I was deeply > involved in sqm when we still had to run at sub 200mbit levels. since > then it's been > mostly tbf (burst 64k) + fq_codel or cake, and me ignoring various bug > reports about it not scaling well enough at higher rates. > On Tue, Sep 4, 2018 at 12:59 PM Dave Taht wrote: > > > > less than scientifically (via monitoring top) - on the apu2 > > > > 100Mbit sqm (htb + fq_codel) > > > > fq_codel_mainline | fq_codel_fast > > idle 78.8 | 83.5 | > > si 20 | 16.1 | > > > > Yea! But: > > > > 900Mbit sqm (htb + fq_codel) > > > > fq_codel_mainline | fq_codel_fast > > idle 74.4 | 74.4 | > > si 25 | 25.1 | > > > > Here: completely bottlenecked on ksoftirqd - and I only get 340Mbits > > out of the 900mbit setting. quantum 96k and burst of 15000. Haven't > > fiddled with higher values yet... > > > > > > > > -- > > > > Dave T=C3=A4ht > > CEO, TekLibre, LLC > > http://www.teklibre.com > > Tel: 1-669-226-2619 > > > > -- > > Dave T=C3=A4ht > CEO, TekLibre, LLC > http://www.teklibre.com > Tel: 1-669-226-2619 --=20 Dave T=C3=A4ht CEO, TekLibre, LLC http://www.teklibre.com Tel: 1-669-226-2619