From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f43.google.com (mail-pb0-f43.google.com [209.85.160.43]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id 86A7121F0EA for ; Thu, 30 Aug 2012 23:55:40 -0700 (PDT) Received: by pbbrq2 with SMTP id rq2so6083189pbb.16 for ; Thu, 30 Aug 2012 23:55:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=subject:from:to:cc:content-type:date:message-id:mime-version :x-mailer:content-transfer-encoding; bh=46fTVPi85Hor0TYCU+nTZvFBD8cz6jue+Ai+ILKRSns=; b=GbDx2sJcpKYYGTZAhAuAyoZytWJtb2taf63FwmVM081Vh7L2a4BlfOSycJ/uyn52aX Wv1UQgCbuBdZ0pU+Xci67eQ0LUboCBm96QKuwpUZUg3tHospZqDUXyBhXw1XY1mkEMN1 TEw7CpR6asbsIeBSISPkvjJTajpmV0o8IUDzVUkWAj3YVGwkreSVj6Zcdxi+JBz+zTAW SbxHN8bVD5Mc+qx0Ax8Y2EmRaUqsTu0imTSgUNGtlekDgWGS5WPd73jmkbMrtOCaTmMK Zgpoty2kLKw59eU0TFuWE/SMv2K6xTV0QYfi0Ezsb4ZGSYGTaDiXe/3UUH66hEKczzxT Bj6Q== Received: by 10.68.231.67 with SMTP id te3mr15823225pbc.134.1346396139931; Thu, 30 Aug 2012 23:55:39 -0700 (PDT) Received: from [10.10.4.254] (0127ahost2.starwoodbroadband.com. [12.105.246.2]) by mx.google.com with ESMTPS id wh7sm2870707pbc.33.2012.08.30.23.55.38 (version=SSLv3 cipher=OTHER); Thu, 30 Aug 2012 23:55:38 -0700 (PDT) From: Eric Dumazet To: codel@lists.bufferbloat.net Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Aug 2012 23:55:37 -0700 Message-ID: <1346396137.2586.301.camel@edumazet-glaptop> Mime-Version: 1.0 X-Mailer: Evolution 2.28.3 Content-Transfer-Encoding: 7bit Subject: [Codel] fq_codel : interval servo X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 31 Aug 2012 06:55:41 -0000 On locally generated TCP traffic (host), we can override the 100 ms interval value using the more accurate RTT estimation maintained by TCP stack (tp->srtt) Datacenter workload benefits using shorter feedback (say if RTT is below 1 ms, we can react 100 times faster to a congestion) Idea from Yuchung Cheng.