From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ig0-x22e.google.com (mail-ig0-x22e.google.com [IPv6:2607:f8b0:4001:c05::22e]) (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 09DD821FA4B for ; Sun, 6 Sep 2015 13:49:21 -0700 (PDT) Received: by igbut12 with SMTP id ut12so46068779igb.1 for ; Sun, 06 Sep 2015 13:49:21 -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; bh=5OugWAiRvVTW4xkOtDGQEaE0qtl4QLScxhbW7iZQXUo=; b=Urn33DpJk+ZSRQhN9gWd5LModdC8y1nq0VhFRlyOP7mFgka7GJPPOPx45r/GWVXFw8 2tCokvWVwKVf/IY3f40gXlFKI5qguyC4eHbx6Of/h0NdhJ4e1kQIJSwiazjZ+yrs4ORl gZsdVjvftaOsSO083e/wCT/yIKhj0Ttba0KdEa1O6X1Td0hytfqjKg8kXxgOZC7ZMemf wfvSgwkufajCdDY8Ia9t1WBFMS3ifpEP8ihmWqN8+yi6lRdIV0cthI1QDVBScKM3gI4x urq8R8e2cFK6ttF7YkKtPkFcNKLKytgnZfVRjiuC7pbosbqOKiwJkuCjweoyFRkcpz9F 3WNQ== MIME-Version: 1.0 X-Received: by 10.50.3.37 with SMTP id 5mr24271799igz.96.1441572560919; Sun, 06 Sep 2015 13:49:20 -0700 (PDT) Received: by 10.79.120.203 with HTTP; Sun, 6 Sep 2015 13:49:20 -0700 (PDT) In-Reply-To: References: Date: Sun, 6 Sep 2015 13:49:20 -0700 Message-ID: From: Aaron Wood To: Dave Taht Content-Type: multipart/alternative; boundary=089e013c6e9a696734051f1a4474 Cc: make-wifi-fast@lists.bufferbloat.net, Felix Fietkau Subject: Re: [Make-wifi-fast] station measurements in a stadium X-BeenThere: make-wifi-fast@lists.bufferbloat.net X-Mailman-Version: 2.1.13 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 06 Sep 2015 20:49:44 -0000 --089e013c6e9a696734051f1a4474 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable I have some traces from a lab environment where probes from mobile stations caused congestion collapse. The active broadcast probes, on all channels, in an AP-rich environment caused the probe responses to use up all the tx-ops. It's ugly, ugly, ugly. Unfortunately (or maybe fortunately?), the stations are all old kernels+drivers (Froyo Android, some kernel 2.6 devices, etc). But the problem is the basic operation of wifi APs. (I wish I could share the raw pcaps, but I can't). -Aaron On Sun, Sep 6, 2015 at 1:15 PM, Dave Taht wrote: > -- > Dave T=C3=A4ht > endo is a terrible disease: http://www.gofundme.com/SummerVsEndo > > _______________________________________________ > Make-wifi-fast mailing list > Make-wifi-fast@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/make-wifi-fast > > --089e013c6e9a696734051f1a4474 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
I have some traces from a lab environment where probes fro= m mobile stations caused congestion collapse.=C2=A0 The active broadcast pr= obes, on all channels, in an AP-rich environment caused the probe responses= to use up all the tx-ops.=C2=A0 It's ugly, ugly, ugly.

<= div>Unfortunately (or maybe fortunately?), the stations are all old kernels= +drivers (Froyo Android, some kernel 2.6 devices, etc).=C2=A0 But the probl= em is the basic operation of wifi APs.

(I wish I c= ould share the raw pcaps, but I can't).

-Aaron=

On Su= n, Sep 6, 2015 at 1:15 PM, Dave Taht <dave.taht@gmail.com>= wrote:
--
Dave T=C3=A4ht
endo is a terrible disease: http://www.gofundme.com/SummerVsEndo=

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