From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-x234.google.com (mail-ig0-x234.google.com [IPv6:2607:f8b0:4001:c05::234]) (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 5193B21F2FD for ; Wed, 22 Apr 2015 10:16:24 -0700 (PDT) Received: by igblo3 with SMTP id lo3so2333595igb.1 for ; Wed, 22 Apr 2015 10:16:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:subject:from:to:cc:date:in-reply-to:references :content-type:mime-version:content-transfer-encoding; bh=7UCw5NK5+l8qEO16HDAdRyrHVaWE7VTUMEvvXz5heoc=; b=fKyarwk8tsBjcdMi14kXzcWqR4aZx1sYeXXwRuQPyCLy6CxNklcsbSRBymiORI/+4z MGVcCziVfW85A3kJBGgTaHtPw75eTXGnobCa9b/n5Yvyd2BRlaaM16/Qhr0OZBhnxLFE N9BHH2NUeExd8UIwW02OYzhAAzUnLJgEuqJ12HqVY2RV/mz+/6xmbAPbFZhF355YzlQY NSte4+kLJMWCj+yg8jhepTnfg2xSo2WyPa+817PvZ/AFx07wjwt5wBKJ4VOdylvK4WnQ 9cZ0HNAOrE3w5Z8siLanljGDU/U4jzhzafCyh36GjtvAJoeWQdCStHGyIIGvW8CKiz7f soWQ== X-Received: by 10.50.137.97 with SMTP id qh1mr6060285igb.39.1429722981602; Wed, 22 Apr 2015 10:16:21 -0700 (PDT) Received: from [172.26.55.207] ([172.26.55.207]) by mx.google.com with ESMTPSA id fs5sm10492244igb.0.2015.04.22.10.16.20 (version=TLSv1.2 cipher=AES128-GCM-SHA256 bits=128/128); Wed, 22 Apr 2015 10:16:20 -0700 (PDT) Message-ID: <1429722979.18561.112.camel@edumazet-glaptop2.roam.corp.google.com> From: Eric Dumazet To: MUSCARIELLO Luca IMT/OLN Date: Wed, 22 Apr 2015 10:16:19 -0700 In-Reply-To: <5537CDB7.60301@orange.com> References: <8AD4493E-EA21-496D-923D-B4257B078A1C@gmx.de> <8E4F61CA-4274-4414-B4C0-F582167D66D6@gmx.de> <2C987A4B-7459-43C1-A49C-72F600776B00@gmail.com> <14cd9e74e48.27f7.e972a4f4d859b00521b2b659602cb2f9@superduper.net> <20150422040453.GB36239@sesse.net> ,<1429676935.18561.42.camel@edumazet-glaptop2.roam.corp.google.com> <12383_1429692679_55376107_12383_9099_1_p7gmr0psut68sen0sao8o4lp.1429692550899@email.android.com> ,<1429710657.18561.68.camel@edumazet-glaptop2.roam.corp.google.com> <25065_1429716388_5537BDA4_25065_2328_1_63pyislbvtjf653k3qt8gw2c.1429715929544@email.android.com> <1429717468.18561.90.camel@edumazet-glaptop2.roam.corp.google.com> <5537CDB7.60301@orange.com> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.10.4-0ubuntu2 Mime-Version: 1.0 Content-Transfer-Encoding: 7bit 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: Wed, 22 Apr 2015 17:16:53 -0000 On Wed, 2015-04-22 at 18:35 +0200, MUSCARIELLO Luca IMT/OLN wrote: > FQ gives you flow isolation. So does fq_codel. sch_fq adds *pacing*, which in itself has benefits, regardless of fair queues : Smaller bursts, less self inflicted drops. If flows are competing, this is the role of Congestion Control module, not packet schedulers / AQM. Packets schedulers help to have smaller bursts, and help CC modules to see a better signal (packet drops or rtt variations)