From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from emea01-db3-obe.outbound.protection.outlook.com (mail-db3hn0249.outbound.protection.outlook.com [157.55.234.249]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client CN "mail.protection.outlook.com", Issuer "MSIT Machine Auth CA 2" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 9AD0F21F1E5 for ; Wed, 20 May 2015 05:47:49 -0700 (PDT) Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=kevin@darbyshire-bryant.me.uk; Received: from [IPv6:2001:470:183f:da2b::717c:e11c] (2001:470:183f:da2b::717c:e11c) by DB5PR07MB0933.eurprd07.prod.outlook.com (25.161.200.140) with Microsoft SMTP Server (TLS) id 15.1.166.22; Wed, 20 May 2015 12:47:31 +0000 Message-ID: <555C825C.1010607@darbyshire-bryant.me.uk> Date: Wed, 20 May 2015 13:47:24 +0100 From: Kevin Darbyshire-Bryant User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Thunderbird/31.7.0 MIME-Version: 1.0 To: References: In-Reply-To: Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha1; boundary="------------ms070401070806010909080101" X-Originating-IP: [2001:470:183f:da2b::717c:e11c] X-ClientProxiedBy: DB5PR08CA0021.eurprd08.prod.outlook.com (25.163.102.159) To DB5PR07MB0933.eurprd07.prod.outlook.com (25.161.200.140) X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:DB5PR07MB0933; X-Microsoft-Antispam-PRVS: X-Exchange-Antispam-Report-Test: UriScan:; X-Exchange-Antispam-Report-CFA-Test: BCL:0; PCL:0; RULEID:(601004)(5005006)(3002001); SRVR:DB5PR07MB0933; BCL:0; PCL:0; RULEID:; SRVR:DB5PR07MB0933; X-Forefront-PRVS: 0582641F53 X-Forefront-Antispam-Report: SFV:SPM; SFS:(10009020)(6009001)(189002)(479174004)(51704005)(52314003)(199003)(2473001)(24454002)(68736005)(5001960100002)(107886002)(33656002)(15975445007)(110136002)(74482002)(62966003)(106356001)(64126003)(77156002)(5001860100001)(50986999)(65816999)(54356999)(76176999)(5001830100001)(87266999)(4001540100001)(97736004)(4001350100001)(87976001)(81156007)(86362001)(59896002)(92566002)(122386002)(1720100001)(512874002)(189998001)(46102003)(450100001)(40100003)(64706001)(568964001)(65806001)(65956001)(83506001)(42186005)(101416001)(2950100001)(19580395003)(2351001)(80316001)(5890100001)(84326002)(105586002)(36756003)(5510600003)(3076002)(3826002); DIR:OUT; SFP:1501; SCL:5; SRVR:DB5PR07MB0933; H:[IPv6:2001:470:183f:da2b::717c:e11c]; FPR:; SPF:None; PTR:InfoNoRecords; MX:1; A:1; LANG:en; Received-SPF: None (protection.outlook.com: darbyshire-bryant.me.uk does not designate permitted sender hosts) X-OriginatorOrg: darbyshire-bryant.me.uk X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 May 2015 12:47:31.4256 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB5PR07MB0933 Subject: Re: [Bloat] Fwd: dslreports and inbound rate shaping 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: Wed, 20 May 2015 12:48:38 -0000 --------------ms070401070806010909080101 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On 19/05/2015 23:37, Dave Taht wrote: > > 0) dslreports has a hires bufferbloat option now in their settings. It > reveals much detail that I like very much. It may not work well on > some browsers. Give it a shot, please. Tried it - fun! Here are some of the results of that fun, I've no idea i= f this will help anyone. > > 1) I like that the graphic .png reports now a ping range, but I think > that is baseline latencies. but I think it would be clearer if it > showed the up and the down, under load, 98th percentile, also. > > an unshaped, unmodified cable modem result in all it's horrible glory: > > http://www.dslreports.com/speedtest/506793 Ok so this is my HG612 unshaped VDSL2 modem sat behind Archer C7. The VD= SL2 link is 40Mbit down, 10Mbit up as reported as its capped 'sync' rate. http://www.dslreports.com/speedtest/513588 Up is horrendous and I think you can see classic TCP sawtoothing in the d= elay as well. Peak just as 'up test' goes idle is strange though. > 2) the "cable" test (which keeps changing the number of flows - these > are all 16/6 flows) thoroughly breaks the sqm system's inbound rate > shaper, using cake or fq_codel (cake here), with my rate set 12% below > the delivered rate (100mbit vs 112Mbit). Behaviour here is different. In theory same test 16/6 flows, down is cap= ped 38Mbit (5%), up at 9.7Mbit(3%) These are all 'cake' http://www.dslreports.com/speedtest/513627 There's a slight double bump at the beginning of the down latency test, b= ut otherwise my browsing/upload/download experience is vastly improved. Tuning the down to 37Mbit helps that bump a little maybe: http://www.dslr= eports.com/speedtest/513652 It gets really interesting if I increase the down limit to 39Mbit: http:/= /www.dslreports.com/speedtest/513782 where it starts to look a bit like your test results. Increasing the up limit showed an interesting step change in upload delay= , this is the up cap set to 9.8Mbit http://www.dslreports.com/speedtest/513863 (I had a really good example = of the delay increasing in a linear fashion as the buffer just couldn't drain fast enough...if I find that te= st result again I'll post it) Tuning it back down, by even as little as 50kbits would remove that step,= I settled on 9.7Mbit for safety. The elephant in my personal room is the high latency baseline measurement= =2E None of the ping response time test sites I've checked give me anywhere near a baseline ping rtt of 100ms. E= ven dslreports say "London UK is ~10ms, Google Europe is ~17ms, Dublin, Ireland, EU is ~20ms, Frankfurt, DE, EU i= s ~27ms" So I clearly don't understand some thing(s) about this test. Anyway, that's been an interesting 2 hours of playing! Kevin > > > 3) I will try to add a few dslreports emulations into the netperf-wrapp= er suite. > > Sigh. Still so much work left to perform on bufferbloat on conventional= devices. > > I think fixing wifi will be harder than this. Building spacecraft is > easier than this. > > -- > Dave T=C3=A4ht > Open Networking needs **Open Source Hardware** > > https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67 > > --------------ms070401070806010909080101 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIAGCSqGSIb3DQEHAqCAMIACAQExCzAJBgUrDgMCGgUAMIAGCSqGSIb3DQEHAQAAoIINnDCC BjQwggQcoAMCAQICAR4wDQYJKoZIhvcNAQEFBQAwfTELMAkGA1UEBhMCSUwxFjAUBgNVBAoT DVN0YXJ0Q29tIEx0ZC4xKzApBgNVBAsTIlNlY3VyZSBEaWdpdGFsIENlcnRpZmljYXRlIFNp Z25pbmcxKTAnBgNVBAMTIFN0YXJ0Q29tIENlcnRpZmljYXRpb24gQXV0aG9yaXR5MB4XDTA3 MTAyNDIxMDE1NVoXDTE3MTAyNDIxMDE1NVowgYwxCzAJBgNVBAYTAklMMRYwFAYDVQQKEw1T dGFydENvbSBMdGQuMSswKQYDVQQLEyJTZWN1cmUgRGlnaXRhbCBDZXJ0aWZpY2F0ZSBTaWdu aW5nMTgwNgYDVQQDEy9TdGFydENvbSBDbGFzcyAxIFByaW1hcnkgSW50ZXJtZWRpYXRlIENs 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