From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f181.google.com (mail-wi0-f181.google.com [209.85.212.181]) (using TLSv1 with cipher RC4-MD5 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority" (verified OK)) by huchra.bufferbloat.net (Postfix) with ESMTPS id 1983220191C for ; Mon, 21 May 2012 18:29:54 -0700 (PDT) Received: by wibhn14 with SMTP id hn14so2668790wib.10 for ; Mon, 21 May 2012 18:29:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; bh=vtVlPfidZ2b09QjNrLxU5ezk1I8CDmTOZ+WuM0ZDikA=; b=UpYlRmniLiR8IXvK07WwoFXqw8S3GO0zJ4+RB4KS52vNQv1ZVPQnagAZ6d07uu9/nT T5du9eRI7daAEM/l5zLj7IjKNHg1dKwrVYQOlGw9oy70G3sfGWVM7se989P3Sg0xbS31 AY+fsRWoWm0SVPpzhy0ztQJwd8U+29yUqSwqt+nVyqtNRrEfSMRak8Y7uBJAnaNHdXN+ yaDeQ7UBEwbpzB9LnWSIeVwZoEAWaxyhJivuYAAdCBa5dkorJ2F0vrat0BCysiGF9Br/ ayWzPuZS3xlPri8pi+n3Fcyy9hMloZP681B+n5gCmphfWV5sVYqQmX04oNJO+O5vgMMq LvUg== MIME-Version: 1.0 Received: by 10.180.102.36 with SMTP id fl4mr22636852wib.2.1337650192973; Mon, 21 May 2012 18:29:52 -0700 (PDT) Received: by 10.223.115.9 with HTTP; Mon, 21 May 2012 18:29:52 -0700 (PDT) In-Reply-To: <4FBAEA65.2090601@hp.com> References: <20120520212944.GK22418@yumi.tdiedrich.de> <20120521003115.GO22418@yumi.tdiedrich.de> <4FBA7A57.7010709@hp.com> <20120521214935.GA28713@yumi.tdiedrich.de> <4FBABEF8.7050002@hp.com> <20120521230950.GB28713@yumi.tdiedrich.de> <4FBAD015.4040907@hp.com> <4FBAEA65.2090601@hp.com> Date: Tue, 22 May 2012 02:29:52 +0100 Message-ID: From: Dave Taht To: Rick Jones Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: Tobias Diedrich , OpenWrt Development List , codel@lists.bufferbloat.net Subject: Re: [Codel] BQL support in Ethernet drivers (and Kathie Nichols and Van Jacobson's new AQM, codel) X-BeenThere: codel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: CoDel AQM discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 22 May 2012 01:29:55 -0000 I would really like people to clearly mark when they are using pfifo_fast, codel, and fq_codel. Secondly, I note that for utterly best results it is useful to ALSO have htb on on ingress to a value only slightly lower than the rate under test, and fq_codel attached to the bin(s) (an example of this is in the deBloat repo on github - both ingress.sh and simple_qos.sh) It would be nice if doing ingress was as simple as egress, maybe using some= sort of tbf + fq_codel.... Otherwise for some benchmarks... at 100Mbit, you will see TCP_STREAM behavior holding the line at ~5ms, and TCP_MAERTS being in excess of 30ms, especially when pfifo_fast is on the other side. Or vice versa, depending on where you are running the test. On Tue, May 22, 2012 at 2:22 AM, Rick Jones wrote: > On 05/21/2012 04:30 PM, Rick Jones wrote: >> >> I think my original ones had the unfortunate effect of putting lines on >> top of one another. Your's seem to put them pretty far apart (at least >> sometimes). We aught to be able to find some reasonable medium in there >> somewhere. I'm thinking if latency is the metric of greatest interest, >> we want that to have the full y axis, and then the peak bandwidth of the >> STREAM test be about half-way up? > > > I've tweaked the bloat.sh script in a couple ways. =A0First, I changed ho= w I > compute the scaling factor, to implement what I described above. Second, = I > am using a negative value for the demo interval for the TCP_RR test. =A0T= his > causes netperf to check if it is time to emit a result after each > transaction rather than after what it thought would be the number of > transactions in the interval. =A0In that way the latency line is much mor= e > robust in the face of a sudden bloating of the path. =A0The effect on > transactions per second should be similar to that of enabling histograms. > =A0An example of a test across my 100 Mbit/s link to a laptop is attached= . > > happy benchmarking, > > rick jones > > _______________________________________________ > Codel mailing list > Codel@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/codel > --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://www.bufferbloat.net