From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-iy0-f171.google.com (mail-iy0-f171.google.com [209.85.210.171]) (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 CF85F2004FF for ; Fri, 20 May 2011 15:30:41 -0700 (PDT) Received: by iyi20 with SMTP id 20so5191659iyi.16 for ; Fri, 20 May 2011 15:42:24 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:in-reply-to:references:date :message-id:subject:from:to:cc:content-type; bh=a0a9jdB3d0mifo/gdkd9Q7X6TkGsuys4w2AFkVFNXTo=; b=pK3ViPllZ2ZGWVBGsznOJxwfqYnQivODXf2RCXj2WnKDdFG3U0AdJfC+NC1XABBIun u7+OnlyocQuKjtcLhl1k0tyR7X+V9cwWE5aFHKFbDniQW+4FH/jFB7iLb8sstvTVag3L xMugMARUnCIDBm998M45FJINOzRQ2D3xVZH58= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=P4ZI12nbD4Aonz2HVO3bgnOm9ZDTfJMoZyxRY9emZQNic59Q4TcAuV1ZeiTIl52k1p cmyV+LxvcKddMlCpobzd8UkPboImGDi+2EakI4JhFbizxHAVrm/x5hu1NHNvxSajLiIQ 94FJv0PWCvOrUbyBL5URQFxdQPp8xAbbK1ayI= MIME-Version: 1.0 Received: by 10.42.136.197 with SMTP id v5mr5762151ict.513.1305931344132; Fri, 20 May 2011 15:42:24 -0700 (PDT) Received: by 10.231.19.200 with HTTP; Fri, 20 May 2011 15:42:24 -0700 (PDT) In-Reply-To: References: <9EFCAA58-92E8-45FD-9BE4-F213564264E6@cc.gatech.edu> <5C1FCBFC-B007-4B01-A7BA-6CCD5523DC34@cc.gatech.edu> <048ECF4E-9E70-4957-90B4-ACD3C0D7AD44@cc.gatech.edu> Date: Fri, 20 May 2011 16:42:24 -0600 Message-ID: From: Dave Taht To: Nick Feamster Content-Type: multipart/alternative; boundary=90e6ba61357cde399604a3bcd59a Cc: bismark-devel@lists.bufferbloat.net Subject: Re: [Bismark-devel] about ready to do another build X-BeenThere: bismark-devel@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: BISMark related software development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 20 May 2011 22:30:42 -0000 --90e6ba61357cde399604a3bcd59a Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable On Fri, May 20, 2011 at 4:35 PM, Nick Feamster wrot= e: > > On May 21, 2011, at 12:28 AM, Dave Taht wrote: > > > > > And btw, what are the results of a speedtest from your location without > QoS on? > > > > Have run it 2x now. > > I see about 850 kbps down and 400 kbps up. > > The default upload setting is abusive. > Sorry. Nicaragua typically had 64k-128k up. Took my best guess. > > > With QoS on, set to up/dl values within a few percentage points of that > (and the overhead calculation disabled) > > > And with QoS set to say 840/380, with the overhead calculation disabled? Should be about 15% below that for a long bulk transfer. Can get closer... Please note that setting these values on the basis of one datapoint in a majorish city will result in bad values deeper in the country.... Helps to also ping somewhere at the same time of the test to see your latencies start to go to heck as you get closer to the "edge". You'll see i= t start to jitter... then go wildly late... and at extreme values, tcp/ip wil= l start to malfunction as per the bufferbloat diagrams... I'd LOVE for a few tcpdumps of stuff like this, from where you are..... > I can bake a better default into the next build, but I was figuring you'd > be lucky to be gettting 1000 down.... > > > > I want to note that according to your previous study, the first 30 > seconds of data need to be discarded in order for a speedtest to be valid= , > and speedtest.net doesn't do that... > > Yep yep... though I don't think PowerBoost is enabled over here. Althoug= h, > we'll find out. :-) > > -Nick --=20 Dave T=E4ht SKYPE: davetaht US Tel: 1-239-829-5608 http://the-edge.blogspot.com --90e6ba61357cde399604a3bcd59a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

On Fri, May 20, 2011 at 4:35 PM, Nick Fe= amster <feam= ster@cc.gatech.edu> wrote:

On May 21, 2011, at 12:28 AM, Dave Taht wrote:

>
> And btw, what are the results of a speedtest from your location withou= t QoS on?
>

Have run it 2x now.

I see about 850 kbps down and 400 kbps up.

The default upload setting is abusive.

Sorry. Nica= ragua typically had 64k-128k up. Took my best guess.
=A0

> With QoS on, set to up/dl values within a few percentage points of tha= t (and the overhead calculation disabled)
>

And with QoS set to say 840/380, with t= he overhead calculation disabled? Should be about 15% below that for a long= bulk transfer. Can get closer...
=A0
Please note that setting these = values on the basis of one datapoint in a majorish city will result in bad = values deeper in the country....

Helps to also ping somewhere at the same time of the test to see your l= atencies start to go to heck as you get closer to the "edge". You= 'll see it start to jitter... then go wildly late... and at extreme val= ues, tcp/ip will start to malfunction as per the bufferbloat diagrams...
I'd LOVE for a few tcpdumps of stuff like this, from where you are.= ....

> I can bake a better default into the next build, but I was figuring yo= u'd be lucky to be gettting 1000 down....
>
> I want to note that according to your previous study, the first 30 sec= onds of data need to be discarded in order for a speedtest to be valid, and= speedtest.net doesn= 't do that...

Yep yep... though I don't think PowerBoost is enabled over here. = =A0Although, we'll find out. :-)

-Nick



--
Dave T=E4ht=
SKYPE: davetaht
US Tel: 1-239-829-5608
http://the-edge.blogspot.com
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