From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-xd33.google.com (mail-io1-xd33.google.com [IPv6:2607:f8b0:4864:20::d33]) by mail.toke.dk (Postfix) with ESMTPS id C24227C6BE3 for ; Thu, 7 Jan 2021 19:35:17 +0100 (CET) Authentication-Results: mail.toke.dk; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=gGAvcj7Z Received: by mail-io1-xd33.google.com with SMTP id w18so7137294iot.0 for ; Thu, 07 Jan 2021 10:35:17 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to:cc :content-transfer-encoding; bh=v3QcxFoQpnbRlw4WCiEeBG8mtWzLM9OkqgMSpdeg7PI=; b=gGAvcj7ZgFfKeVa11BMB4A1/gShuWW8qglyDvG3CBscsl1rfTPmgKxZ5WXT4iaIdYb 1SEUKQKAkprh8c/FD95jGHP60pSkBctGeG/H7GgPEM4K3e6YNygiCbnjbOA6KIJSF4QG 3KGWSKnvCdroGlhdZAytPpqYOpmnaLXafRvDJskJSfyeDTAUMv9AM+LdNiEkOIHg+61W D3XyyqlTNa6rUkiQ/02EbH4nMIOMcqI05rVN1XTL6N8iAWrvJBrzsk4sV5mBnjYnrGZF YnV4Yb60Jbhjzk2jHNTY+WeDIrAMaDi6gYruUX8foLVmojXco1/myHX7mEi9aymzy3+G kNrA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc :content-transfer-encoding; bh=v3QcxFoQpnbRlw4WCiEeBG8mtWzLM9OkqgMSpdeg7PI=; b=rAedOM5LIw0kmoHP1YJT0Y0+YIk2yGDGDnIONHaBHBuSvpmmRLUWl6k8MSyvMUYZbV eek87IIgFAq3BAssh5eEm27OgVssqAg7a1+73CWFNCk2Axqjz0bnqWeLAL+AxxLd9BXT 51EbbSa8F1PoToc9C85olV6mCilLMFSRtDZXw679k6wDxuiy53EjuiGt+yXZ19VauqOB 6o8pA5yxEd+FTR5F52Eb0i0tcCFEHzdRV6+0gwl08rpmqIkFqhG1jwwwDT9AdBFcmNH9 d7l0xIppmTuqmON1wWy7zW0O3FlI8+rGk+Osxk5DJ41o2O/SDsdUHcRbld2y/eIHU9TX B+ng== X-Gm-Message-State: AOAM532/Je97QoxlhbleXrsk6dM7VUOTSweT1KffrWhefsFbTLzAaLrL 5ohNeO+JzvU0P6jLwmIWKO+UEe1lkMI3zyetLHU= X-Google-Smtp-Source: ABdhPJxTZV/dWYJs9yLM4yWgqAdnnnog65sKnhmj28RvIKJUXsRLjcJ4msCHmZCOpXJDTI2Ji2l4JU0R1zRt1eMmk8o= X-Received: by 2002:a02:a304:: with SMTP id q4mr9010729jai.97.1610044512287; Thu, 07 Jan 2021 10:35:12 -0800 (PST) MIME-Version: 1.0 From: Dave Taht Date: Thu, 7 Jan 2021 10:35:00 -0800 Message-ID: To: bloat , codel@lists.bufferbloat.net, ECN-Sane , Make-Wifi-fast , flent-users , BBR Development Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Message-ID-Hash: OPB2PNKJLFD65HD6STATNMJBU3DNMEGU X-Message-ID-Hash: OPB2PNKJLFD65HD6STATNMJBU3DNMEGU X-MailFrom: dave.taht@gmail.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; suspicious-header CC: ghosal@cs.ucdavis.edu, tflynn@ucdavis.edu X-Mailman-Version: 3.3.2 Precedence: list Subject: [Flent-users] D* tcp looks pretty good, on paper List-Id: Flent discussion list Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: See: https://arxiv.org/pdf/2012.14996.pdf Things I really like: * they used flent * Using "variance" as the principal signal. This is essentially one of the great unpublished and unanalyzed improvements on the minstrel algorithm as well * Conventional ecn response * outperforms bbr on variable links Only negative so far is I haven't found any published source to it. :( Otherwise a very promising start to a year. "The choice of feedback mechanism between delay and packet loss has long been a point of contention in TCP congestion control. This has partly been resolved, as it has become increasingly evident that delay based methods are needed to facilitate modern interactive web applications. However, what has not been resolved is what control should be used, with the two candidates being the congestion window and the pacing rate. BBR is a new delay based congestion control algorithm that uses a pacing rate as its primary control and the congestion window as a secondary control. We propose that a congestion window first algorithm might give more desirable performance characteristics in situations where latency must be minimized even at the expense of some loss in throughput. To evaluate this hypothesis we introduce a new congestion control algorithm called TCP D*, which is a congestion window first algorithm that adopts BBR's approach of maximizing delivery rate while minimizing latency. In this paper, we discuss the key features of this algorithm, discuss the differences and similarity to BBR, and present some preliminary results based on a real implementation." --=20 "For a successful technology, reality must take precedence over public relations, for Mother Nature cannot be fooled" - Richard Feynman dave@taht.net CTO, TekLibre, LLC Tel: 1-831-435-0729