From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from rcdn-iport-1.cisco.com (rcdn-iport-1.cisco.com [173.37.86.72]) (using TLSv1 with cipher RC4-SHA (128/128 bits)) (Client CN "rcdn-iport.cisco.com", Issuer "Cisco SSCA2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 9490121F0FA; Tue, 29 Apr 2014 00:21:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cisco.com; i=@cisco.com; l=2272; q=dns/txt; s=iport; t=1398756093; x=1399965693; h=from:to:cc:subject:date:message-id:references: in-reply-to:mime-version; bh=7SiAE4a4iBrxHhimWIUl7iyIMwtct23xHtU5GQDWK1E=; b=GDWDc6eyw0rW+/QTIWpU82Uf7q6tL3lqXCv8WkutexqgCszxatvQpJDe fqMyDKwdTLdnk78jLHTG0oRChz1vUZ2KTqoxJVMi/+3D+pEAbtUw2WNSX BbLyfKq24EDLYAenyCLSJwCCiRIw43zLOsD0qsOy2kMpeS/ukEFLKr86r 4=; X-Files: signature.asc : 195 X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: ApgFAK9SX1OtJA2E/2dsb2JhbABZgwZPV709hzmBHBZ0giUBAQEDAQEBAWsLBQsCAQgOCi4nCyUCBA4FDogrCA3JFBeJL4Q+EQFQBwmDG4EVBIU7i0eBOIZTgTyRJYMxgXI5 X-IronPort-AV: E=Sophos;i="4.97,949,1389744000"; d="asc'?scan'208";a="320905872" Received: from alln-core-10.cisco.com ([173.36.13.132]) by rcdn-iport-1.cisco.com with ESMTP; 29 Apr 2014 07:21:32 +0000 Received: from xhc-aln-x02.cisco.com (xhc-aln-x02.cisco.com [173.36.12.76]) by alln-core-10.cisco.com (8.14.5/8.14.5) with ESMTP id s3T7LWJD010325 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL); Tue, 29 Apr 2014 07:21:32 GMT Received: from xmb-rcd-x09.cisco.com ([169.254.9.100]) by xhc-aln-x02.cisco.com ([173.36.12.76]) with mapi id 14.03.0123.003; Tue, 29 Apr 2014 02:21:32 -0500 From: "Fred Baker (fred)" To: Mikael Abrahamsson Thread-Topic: [aqm] the side effects of 330ms lag in the real world Thread-Index: AQHPY3ulkMTE4Rpp6E+HqfC8bSk3Tw== Date: Tue, 29 Apr 2014 07:21:31 +0000 Message-ID: <4130D000-FE28-4A5E-B824-3371C1602472@cisco.com> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: x-originating-ip: [10.21.85.48] Content-Type: multipart/signed; boundary="Apple-Mail=_E58775AF-F777-4FB6-9447-70E863C1440E"; protocol="application/pgp-signature"; micalg=pgp-sha1 MIME-Version: 1.0 Cc: bloat , "cerowrt-devel@lists.bufferbloat.net" , "aqm@ietf.org" Subject: Re: [Cerowrt-devel] [aqm] the side effects of 330ms lag in the real world X-BeenThere: cerowrt-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: Development issues regarding the cerowrt test router project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 29 Apr 2014 07:21:33 -0000 --Apple-Mail=_E58775AF-F777-4FB6-9447-70E863C1440E Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=windows-1252 On Apr 29, 2014, at 3:08 AM, Mikael Abrahamsson = wrote: > On Mon, 28 Apr 2014, Dave Taht wrote: >=20 >> pretty wonderful experiment and video http://livingwithlag.com/ >=20 > Just so that everybody realises that this is an advertisement. >=20 > Also, what access method has 300 ms access latency, let alone 3 = seconds? None that I know of, the meaningful comparison would be ADSL2+ = at around 25ms and 3G at around 50-100ms. Well, we could discuss international communications. I happen to be at = Infocom in Toronto, VPN=92d into Cisco San Jose, and did a ping to you: ping -c 10 swm.pp.se PING swm.pp.se (212.247.200.143): 56 data bytes ... --- swm.pp.se ping statistics --- 10 packets transmitted, 10 packets received, 0.0% packet loss round-trip min/avg/max/stddev =3D 249.368/342.038/456.376/71.902 ms 3 seconds is unusually high, although naval satcom is frequently in the = 1.5-2.5 ms range. But I have a sample that I measured in a Dublin hotel = that observed standing latencies of around 280 ms to San Jose, frequent = latencies of seven seconds, and a peak of 9286 ms. Yes, the hotel DSL = was horrendously misconfigured. It makes a great graphic for = presentations. > --=20 > Mikael Abrahamsson email: swmike@swm.pp.se >=20 > _______________________________________________ > aqm mailing list > aqm@ietf.org > https://www.ietf.org/mailman/listinfo/aqm ---------------------------------------------------- The ignorance of how to use new knowledge stockpiles exponentially.=20 - Marshall McLuhan --Apple-Mail=_E58775AF-F777-4FB6-9447-70E863C1440E Content-Transfer-Encoding: 7bit Content-Disposition: attachment; filename="signature.asc" Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Message signed with OpenPGP using GPGMail -----BEGIN PGP SIGNATURE----- Comment: GPGTools - http://gpgtools.org iD8DBQFTX1L7bjEdbHIsm0MRAjUZAJ4nbQAVUezS4Ja6bwczez+VvfNBlgCg4Bis xZwDo3YmgEt0PjUcC1cJcCs= =2UXv -----END PGP SIGNATURE----- --Apple-Mail=_E58775AF-F777-4FB6-9447-70E863C1440E--