From owner-freebsd-wireless@FreeBSD.ORG Tue Aug 19 22:30:55 2014 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 037E08D2 for ; Tue, 19 Aug 2014 22:30:55 +0000 (UTC) Received: from mail-qa0-x229.google.com (mail-qa0-x229.google.com [IPv6:2607:f8b0:400d:c00::229]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id B89843794 for ; Tue, 19 Aug 2014 22:30:54 +0000 (UTC) Received: by mail-qa0-f41.google.com with SMTP id j7so6358912qaq.28 for ; Tue, 19 Aug 2014 15:30:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:sender:in-reply-to:references:date:message-id:subject :from:to:cc:content-type; bh=njg15VnrEMpLviLKPzyjWpypHu1DklDIsC4y/yvXWCg=; b=VxswctPBSdEKrTcMEPgGyeghSpPv7142K84WYic5vLilYAgOGkVXCHpZwb27GJxpVH BroKiun5MkQoe5q1ksJfQDBu1a/xMaVqi24y5E9kUq7nKP20ELG2ELpMi8LqeK38P7kP SUZzMOuv2gvoPFG2Vt0HSyM5Jt/qomrwI1h+ZAmIo+xdzAUpqAyJhpud6LbEL+h6AKvj wB7hMrAg4aODcjvGc5YGv2ofN882EEAr68aQycw6huQPRKjyrktNPwFrWbobSgnQ6ran H7YBt+Wd14wJgoMr7NajSN5Ge2dzo6xNu139i3yuFBotqp08h3Bj9Y1pES+obdHSgCZM jFpw== MIME-Version: 1.0 X-Received: by 10.140.90.40 with SMTP id w37mr67129572qgd.52.1408487453754; Tue, 19 Aug 2014 15:30:53 -0700 (PDT) Sender: adrian.chadd@gmail.com Received: by 10.224.39.139 with HTTP; Tue, 19 Aug 2014 15:30:53 -0700 (PDT) In-Reply-To: References: Date: Tue, 19 Aug 2014 15:30:53 -0700 X-Google-Sender-Auth: 6SxLaG4ZndBU8TMNPxiz1PW2Wis Message-ID: Subject: Re: iwn: Intel Centrino 6205 bad 11n performance From: Adrian Chadd To: Johannes Dieterich Content-Type: text/plain; charset=UTF-8 Cc: "freebsd-wireless@freebsd.org" X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.18-1 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: Tue, 19 Aug 2014 22:30:55 -0000 Hi, You can try disabling 11n (ifconfig -ht) but besides that, there's no real iwn maintainer or anyone who wants to get really nitty gritty into what the driver is doing. So until that happens, I think we're short of luck. :( -a On 19 August 2014 12:53, Johannes Dieterich wrote: > Dear all, > > I have a Intel Centrino Advanced-N 6205 WLAN NIC in my Thinkpad using iwn. > > iwn0@pci0:3:0:0: class=0x028000 card=0x13118086 chip=0x00858086 rev=0x34 > hdr=0x00 > vendor = 'Intel Corporation' > device = 'Centrino Advanced-N 6205 [Taylor Peak]' > class = network > > Unfortunately, I only get a rather bad speed using CURRENT (r270098) out of > the chip. It is connected to an 11n (on the 2.4 GHz band) network: > > wlan0: flags=8843 metric 0 mtu 1500 > nd6 options=29 > media: IEEE 802.11 Wireless Ethernet MCS mode 11ng > status: associated > ssid XXXXX channel 4 (2427 MHz 11g ht/20) bssid XXXXXXXXXX > country US authmode WPA2/802.11i privacy ON deftxkey UNDEF > TKIP 2:128-bit txpower 15 bmiss 10 scanvalid 60 bgscan bgscanintvl 300 > bgscanidle 250 roam:rssi 7 roam:rate 64 protmode CTS ampdulimit 64k > ampdudensity 8 -amsdutx amsdurx shortgi wme roaming MANUAL > > I get a maximum of 900 KB/s of throughput (both in/out, approximated by > copying a large file using scp), within the network and to the outside > world. Running SuSE Linux on the notebook allows me to easily saturate my > uplink at > 3MB/s, didn't then further check within the network. I get no > log messages on FBSD from iwn and I am not located in a particularly noisy > neighborhood. > > The only performance issue I can find with this chip is one old report on > Ubuntu (http://ubuntuforums.org/showthread.php?t=1949571), where the 11n > seemed to be the culprit in the driver/firmware. Could this be an issue for > us as well (firmware problem?)? > > As my workhorse is FreeBSD, I'd love to fix this issue. How can I further > debug this issue and/or provide more data? I know that the status of iwn in > FBSD is difficult ATM but maybe there is hope? > > Best > > Johannes > _______________________________________________ > freebsd-wireless@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-wireless > To unsubscribe, send any mail to "freebsd-wireless-unsubscribe@freebsd.org"