From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-bw0-f43.google.com (mail-bw0-f43.google.com [209.85.214.43]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 0F7C1201146 for ; Wed, 21 Sep 2011 19:24:20 -0700 (PDT) Received: by bkas6 with SMTP id s6so3283218bka.16 for ; Wed, 21 Sep 2011 19:24:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=subject:mime-version:content-type:from:in-reply-to:date:cc :content-transfer-encoding:message-id:references:to:x-mailer; bh=nikMg23RIY2jbxexOxphPLeHjgzqwbTDcm3VVoXwHWQ=; b=XaBNQIMSDKO44qSYGBmKXdfN3RkTnCaoE7vVlsA5VZ+uOBjV32dyJQK2MMoLp8fw+v CiHkNQlpMpT72NWgtbUkAZhD2QlQgTq9D2ERZQuTvcs2B3GSFOHAi+x0WH+DaiJ9o8ll dBiVu0HdncFxdmynKKs7Upa8Vcb2GFhzSVHlI= Received: by 10.204.154.199 with SMTP id p7mr986324bkw.151.1316658258996; Wed, 21 Sep 2011 19:24:18 -0700 (PDT) Received: from [192.168.239.42] (xdsl-83-150-84-172.nebulazone.fi. [83.150.84.172]) by mx.google.com with ESMTPS id d1sm6709674bku.1.2011.09.21.19.24.16 (version=TLSv1/SSLv3 cipher=OTHER); Wed, 21 Sep 2011 19:24:17 -0700 (PDT) Subject: Re: Preliminary results of using GPS to look for clock skew Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: text/plain; charset=us-ascii From: Jonathan Morton In-Reply-To: <20110922021137.GB21302@thyrsus.com> Date: Thu, 22 Sep 2011 05:24:15 +0300 Content-Transfer-Encoding: quoted-printable Message-Id: References: <20110921230205.2275820C2E5@snark.thyrsus.com> <20110922021137.GB21302@thyrsus.com> To: esr@thyrsus.com X-Mailer: Apple Mail (2.1084) Cc: bloat-devel@lists.bufferbloat.net, Eric Raymond , Hal Murray X-BeenThere: bloat-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: "Developers working on AQM, device drivers, and networking stacks" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Sep 2011 02:24:21 -0000 On 22 Sep, 2011, at 5:11 am, Eric Raymond wrote: >> 2) ReRun all tests under load (example: netperf -l 3600 -H = the_router) >=20 > I'll do this, for completeness, but I predict it's not going to make > any measurable difference. The indications so far are that neither of > the means of time delivery I have available to check are compute-bound > or disk-I/O bound at any point in their delivery chains. =20 >=20 > So I think they're just going to shrug off any load short of > machine-thrashing-its-guts-out. But part of the point of what I'm > doing is that soon we'll have the test tools to know for *sure* that's > true. When the *network* is loaded, the latency to the NTP server changes. = That is likely to confuse ntpd - it certainly did when I lived on an = analogue modem. - Jonathan Morton