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 155FA20019F for ; Fri, 31 Aug 2012 06:41:44 -0700 (PDT) Received: by pbbrq2 with SMTP id rq2so6747712pbb.16 for ; Fri, 31 Aug 2012 06:41:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:message-id:date:from:organization:user-agent:mime-version:to :cc:subject:references:in-reply-to:content-type :content-transfer-encoding; bh=BvxiUo73Tm/StiLGPKx12vR27k8YTXY1lWH8ABNBLkI=; b=0o/PgewbNeIzUp8edgTpL7pb8Ug9M+EgkAnfIPlRY4vpqyfwyuJPzev4zJ/pLaiAe8 m6tu0dNNyWkIuFK4cGK8BMo9YQiGakUpjIOToUpDcSCJ+mRVms05UDt5Time7U13bRix +xu6cSpYKwoR/wk2NvaxSAyAUWfq2kGNMN73QX0wiCu7+6CHhaE1l+NCCuPlX2oqvfA2 0HxZVYfhdS15QTmjs+hkSZSpMoyB59x/qAhF2aPK8PIp+S6W7wKf2rB38o08yvryr7tO g8DnPtn+uY6KQVIGWINukDn+ccfVmWG0w2KqXGXJIjMxKNVGK6/fw/SolYevDE/4Ywbb vvAA== Received: by 10.66.88.40 with SMTP id bd8mr15415534pab.36.1346420503385; Fri, 31 Aug 2012 06:41:43 -0700 (PDT) Received: from [192.168.250.8] (ip-64-134-224-61.public.wayport.net. [64.134.224.61]) by mx.google.com with ESMTPS id to6sm3476256pbc.12.2012.08.31.06.41.41 (version=SSLv3 cipher=OTHER); Fri, 31 Aug 2012 06:41:42 -0700 (PDT) Sender: Jim Gettys Message-ID: <5040BF13.90604@freedesktop.org> Date: Fri, 31 Aug 2012 06:41:39 -0700 From: Jim Gettys Organization: Bell Labs User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:14.0) Gecko/20120714 Thunderbird/14.0 MIME-Version: 1.0 To: Eric Dumazet References: <1346396137.2586.301.camel@edumazet-glaptop> In-Reply-To: <1346396137.2586.301.camel@edumazet-glaptop> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: codel@lists.bufferbloat.net Subject: Re: [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 13:41:44 -0000 On 08/30/2012 11:55 PM, Eric Dumazet wrote: > 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) Interesting. Ethernet flow control might finally have some benefit then in those environments... - Jim > > Idea from Yuchung Cheng. > > > _______________________________________________ > Codel mailing list > Codel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/codel