From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-la0-x230.google.com (mail-la0-x230.google.com [IPv6:2a00:1450:4010:c03::230]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id EF10D21F450 for ; Sun, 19 Apr 2015 11:26:54 -0700 (PDT) Received: by lagv1 with SMTP id v1so112201174lag.3 for ; Sun, 19 Apr 2015 11:26:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=content-type:mime-version:subject:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to; bh=NrrHuk2iGRWg2CMLGW8k1xdkEMTWf384jQpx/ku9xaQ=; b=Kcv8zUtLL2+bJlwI7ghj9TJRf4CDndEDyFX95g5Z+cAJ2znHj0f9aUiMWaH0tN+ArU qcpUr7lMT1uA79rTF0bPuRDztVinld7JTq0PzdidkZg2jTvSjysQgP3vUoQmeo/Cnk8g jYT0r7/fSEvvU9uvLEMFisgI61vLFNezoQjzVw/dRuCjc9anYNrMMYDV5T6Mp7UdAQMQ 7BJObsNGhOyoXFbc1+1Puo3XUr40+23KUYh3wwc+1zlYMP4gAtrWClh0mSEtXQANABhS bNPeLTuGtzVm7pHdShlWrnA86uu2+uviTvRCBmb5cO5z0R/jqCZAXzlW9CfLebXJr5sg IUxw== X-Received: by 10.152.42.171 with SMTP id p11mr12676638lal.57.1429468012471; Sun, 19 Apr 2015 11:26:52 -0700 (PDT) Received: from bass.home.chromatix.fi (188-67-141-134.bb.dnainternet.fi. [188.67.141.134]) by mx.google.com with ESMTPSA id an8sm3806426lac.25.2015.04.19.11.26.44 (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Sun, 19 Apr 2015 11:26:51 -0700 (PDT) Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2098\)) From: Jonathan Morton In-Reply-To: <87fv7wj9lh.fsf@toke.dk> Date: Sun, 19 Apr 2015 21:26:32 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: References: <87wq18jmak.fsf@toke.dk> <87oamkjfhf.fsf@toke.dk> <87k2x8jcnw.fsf@toke.dk> <87fv7wj9lh.fsf@toke.dk> To: =?utf-8?Q?Toke_H=C3=B8iland-J=C3=B8rgensen?= X-Mailer: Apple Mail (2.2098) Cc: bloat Subject: Re: [Bloat] DSLReports Speed Test has latency measurement built-in 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: Sun, 19 Apr 2015 18:27:23 -0000 > On 19 Apr, 2015, at 20:45, Toke H=C3=B8iland-J=C3=B8rgensen = wrote: >=20 > Why not? They can be a quite useful measure of how competing traffic > performs when bulk flows congest the link. Which for many applications > is more important then the latency experienced by the bulk flow > itself. One clear objection is that ICMP is often prioritised when UDP is not. = So measuring with UDP gives a better indication in those cases. = Measuring with a separate TCP flow, such as HTTPing, is better still by = some measures, but most truly latency-sensitive traffic does use UDP. - Jonathan Morton