From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from korolev.univ-paris7.fr (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by huchra.bufferbloat.net (Postfix) with ESMTPS id 2652221F2AE for ; Mon, 22 Jun 2015 05:05:30 -0700 (PDT) Received: from potemkin.univ-paris7.fr (potemkin.univ-paris7.fr [IPv6:2001:660:3301:8000::1:1]) by korolev.univ-paris7.fr (8.14.4/8.14.4/relay1/56100) with ESMTP id t5MC5Sqc025103 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Mon, 22 Jun 2015 14:05:28 +0200 Received: from mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [81.194.30.253]) by potemkin.univ-paris7.fr (8.14.4/8.14.4/relay2/56228) with ESMTP id t5MC5SIx022552; Mon, 22 Jun 2015 14:05:28 +0200 Received: from mailhub.math.univ-paris-diderot.fr (localhost [127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTP id 4771F61FA1; Mon, 22 Jun 2015 14:05:28 +0200 (CEST) X-Virus-Scanned: amavisd-new at math.univ-paris-diderot.fr Received: from mailhub.math.univ-paris-diderot.fr ([127.0.0.1]) by mailhub.math.univ-paris-diderot.fr (mailhub.math.univ-paris-diderot.fr [127.0.0.1]) (amavisd-new, port 10023) with ESMTP id M_01ZaAhOE-w; Mon, 22 Jun 2015 14:05:22 +0200 (CEST) Received: from pirx.pps.univ-paris-diderot.fr (unknown [78.194.40.74]) (Authenticated sender: jch) by mailhub.math.univ-paris-diderot.fr (Postfix) with ESMTPSA id 7E50D61F9D; Mon, 22 Jun 2015 14:05:22 +0200 (CEST) Date: Mon, 22 Jun 2015 14:05:23 +0200 Message-ID: <87h9q02bjw.wl-jch@pps.univ-paris-diderot.fr> From: Juliusz Chroboczek To: Eric Dumazet In-Reply-To: <1434956529.4110.1.camel@edumazet-glaptop2.roam.corp.google.com> References: <87y4jgbejc.wl-jch@pps.univ-paris-diderot.fr> <6644BD81-1FFC-450C-89FD-91E138B7824A@gmail.com> <1434697811.31511.9.camel@edumazet-glaptop2.roam.corp.google.com> <87y4jd3xwt.wl-jch@pps.univ-paris-diderot.fr> <1434956529.4110.1.camel@edumazet-glaptop2.roam.corp.google.com> User-Agent: Wanderlust/2.15.9 MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; format=flowed; charset=US-ASCII X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (korolev.univ-paris7.fr [IPv6:2001:660:3301:8000::1:2]); Mon, 22 Jun 2015 14:05:28 +0200 (CEST) X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.2.7 (potemkin.univ-paris7.fr [194.254.61.141]); Mon, 22 Jun 2015 14:05:28 +0200 (CEST) X-Miltered: at korolev with ID 5587FA08.002 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-Miltered: at potemkin with ID 5587FA08.002 by Joe's j-chkmail (http : // j-chkmail dot ensmp dot fr)! X-j-chkmail-Enveloppe: 5587FA08.002 from potemkin.univ-paris7.fr/potemkin.univ-paris7.fr/null/potemkin.univ-paris7.fr/ X-j-chkmail-Enveloppe: 5587FA08.002 from mailhub.math.univ-paris-diderot.fr/mailhub.math.univ-paris-diderot.fr/null/mailhub.math.univ-paris-diderot.fr/ X-j-chkmail-Score: MSGID : 5587FA08.002 on korolev.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Score: MSGID : 5587FA08.002 on potemkin.univ-paris7.fr : j-chkmail score : . : R=. U=. O=. B=0.000 -> S=0.000 X-j-chkmail-Status: Ham X-j-chkmail-Status: Ham Cc: bloat Subject: Re: [Bloat] using tcp_notsent_lowat in various apps? X-BeenThere: bloat@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: General list for discussing Bufferbloat List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 22 Jun 2015 12:06:00 -0000 >> amount of buffering depends on the kernel latency, and hence should be >> better done by the kernel itself. > Unless you have thousands of tcp flows maybe, where (unswapable) kernel > memory becomes a precious resource. Thanks, that makes sense. -- Juliusz