From owner-freebsd-wireless@FreeBSD.ORG Sat Feb 23 21:02:10 2013 Return-Path: Delivered-To: freebsd-wireless@freebsd.org Received: from mx1.freebsd.org (mx1.FreeBSD.org [8.8.178.115]) by hub.freebsd.org (Postfix) with ESMTP id 1264CF99 for ; Sat, 23 Feb 2013 21:02:10 +0000 (UTC) (envelope-from adrian.chadd@gmail.com) Received: from mail-we0-x22a.google.com (mail-we0-x22a.google.com [IPv6:2a00:1450:400c:c03::22a]) by mx1.freebsd.org (Postfix) with ESMTP id A642732E for ; Sat, 23 Feb 2013 21:02:09 +0000 (UTC) Received: by mail-we0-f170.google.com with SMTP id z53so1494521wey.29 for ; Sat, 23 Feb 2013 13:02:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=mime-version:x-received:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=XQdv2L4tDq/TWYXQCRvOda5ue1NnUB78GpI9BGpIM1E=; b=Gf81cOQ+MtgUZKIu/yILgmlQOqXgRX35qSTQ+xcdtQ3e6xyU/3yFyTCe2xIG/LDqEx 59F9xuZxUz0k6fQ/4rxvkNzEGoFBBeYbSQIZ7Yp6Jo8dB98CEGzLJ/hZi0rd8EpiLc9Z bG3A6LPDvDGO71rWjULTGew3m5ow5WCqi73LczqDP5Fl059jfSMZil73bOqvXzhLyWjs w2GnjYjs59ta55NDrY6zHZeKPmZd9ozJ2rM1yglMA/13rajwdJQqQGjtAqQw8xmoGj3D W0aIaxGSBfwIdPCx75gojqIWPc2hMzRT0vcLpSI6n36yPJ3CRdCNlcSVSx6o/SzNXk88 lPUQ== MIME-Version: 1.0 X-Received: by 10.180.24.229 with SMTP id x5mr4135089wif.17.1361653328480; Sat, 23 Feb 2013 13:02:08 -0800 (PST) Sender: adrian.chadd@gmail.com Received: by 10.216.74.194 with HTTP; Sat, 23 Feb 2013 13:02:08 -0800 (PST) In-Reply-To: References: Date: Sat, 23 Feb 2013 13:02:08 -0800 X-Google-Sender-Auth: P1VerelPl_P4t2Ylloaaf8z6t6E Message-ID: Subject: Re: ath performance degradation between Oct-12 and now? From: Adrian Chadd To: Sven Hazejager Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-wireless@freebsd.org X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.14 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: Sat, 23 Feb 2013 21:02:10 -0000 On 23 February 2013 12:16, Sven Hazejager wrote: > I have just upgraded my ALIX router (with an Atheros 9160) from > FreeBSD-HEAD r241243 (Oct 6, 2012) to r247155 (today) and I am > noticing slightly lower throughput rates. > > With iperf, sitting 1 meter from the router, I consistently get 79-81 > Mbits/sec TCP with r241243. This "drops" to 74-76 in r247155 (never > higher than 75.5 actually). The rates also seem to vary a bit more > (but that's hard to quantify). > > Anything I should be looking for? I'm more than happy to share debug > output etc. if instructed how to capture. Hi, The best thing to do is to test different kernel versions and see which change introduced the performance degradation. Unfortunately I can't discount the possibility that the issue is elsewhere in the kernel or compiler toolchain. Sorry :( Adrian