From owner-freebsd-wireless@FreeBSD.ORG Thu Sep 8 07:00:20 2011 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id BA3391065677; Thu, 8 Sep 2011 07:00:20 +0000 (UTC) (envelope-from bschmidt@techwires.net) Received: from mail-fx0-f54.google.com (mail-fx0-f54.google.com [209.85.161.54]) by mx1.freebsd.org (Postfix) with ESMTP id 2073A8FC0A; Thu, 8 Sep 2011 07:00:19 +0000 (UTC) Received: by fxe4 with SMTP id 4so1684730fxe.13 for ; Thu, 08 Sep 2011 00:00:19 -0700 (PDT) MIME-Version: 1.0 Received: by 10.223.24.21 with SMTP id t21mr629101fab.24.1315465218778; Thu, 08 Sep 2011 00:00:18 -0700 (PDT) Sender: bschmidt@techwires.net Received: by 10.223.73.202 with HTTP; Thu, 8 Sep 2011 00:00:18 -0700 (PDT) X-Originating-IP: [91.46.213.195] In-Reply-To: References: <201109062237.00788.jpaetzel@freebsd.org> <248CA120-66D2-47C4-AFCB-716552D5AB9D@FreeBSD.org> <201109070907.55652.jpaetzel@freebsd.org> Date: Thu, 8 Sep 2011 09:00:18 +0200 X-Google-Sender-Auth: aVZyrBSmQ-AMTBb3wNxVnzoLmrE Message-ID: From: Bernhard Schmidt To: Josh Paetzel Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Cc: "freebsd-wireless@freebsd.org" Subject: Re: T510 iwn and 9.0 X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 08 Sep 2011 07:00:20 -0000 On Wed, Sep 7, 2011 at 18:10, Adrian Chadd wrote: > On 8 September 2011 00:07, Josh Paetzel wrote: >> On Wednesday 07 September 2011 07:27:05 Josh Paetzel wrote: >>> ifconfig wlan0 -ampdutx >> >> I've been associated to the wireless at work for about 30 minutes using = this >> parameter with no drops. =A0I'd say this has fixed it, as the drops I wa= s >> getting yesterday were every minutes or so and basically made it unusabl= e. Ok, thanks, so it indeed looks like a TX aggregation issue. Can I talk you into getting more debug info? wlandebug 0xffffffff sysctl dev.iwn.0.debug=3D0xffffffff That is indeed quite spammy, but I'm not yet sure what I'm looking for exac= tly.. TX aggregation is only started if there is certain amount of traffic, if you say it is within one minute, what kind of traffic was that? Just some web serving, email, or..? Also, I would be great if you have another device available to capture a dump of what's going on. The dump shouldn't get too large if it's only a minute. :) > Cool. Bernhard, didn't you mention the ampdu TX bitmap stuff needed > some surgery in if_iwn? Yeah, for reporting stats to the ratectl algo, which itself needs some bigger surgery obviously :) But I'm not convinced that this is related. -- Bernhard