Return-path: Received: from mail.candelatech.com ([208.74.158.172]:34955 "EHLO ns3.lanforge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758385Ab2EaWb5 (ORCPT ); Thu, 31 May 2012 18:31:57 -0400 Message-ID: <4FC7F14F.3020608@candelatech.com> (sfid-20120601_003300_589238_E59049D7) Date: Thu, 31 May 2012 15:31:43 -0700 From: Ben Greear MIME-Version: 1.0 To: Adrian Chadd CC: Sujith Manoharan , "linux-wireless@vger.kernel.org" , "ath9k-devel@lists.ath9k.org" Subject: Re: Anyone doing WiFi throughput tests? References: <4FC04B5A.1070900@candelatech.com> <20416.19680.571601.549629@gargle.gargle.HOWL> <4FC0F8CE.1030303@candelatech.com> <20417.972.888113.821079@gargle.gargle.HOWL> <20417.1857.115550.807746@gargle.gargle.HOWL> <4FC2437C.9090106@candelatech.com> <4FC2F73F.4070701@candelatech.com> <20419.9719.160216.124618@gargle.gargle.HOWL> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: On 05/31/2012 12:24 PM, Adrian Chadd wrote: > .. yup, I got it to 250MBit UDP. :-) > > It turns out that (at least in FreeBSD-9), the scheduler and sleep > state behaviour when doing adaptive power save/sleep state (ie, > adaptive CPU speed changes, going into C2) is enough to negatively > impact my iperf and ath/net80211 taskqueue scheduling. > > When I nail it back up to C1, fixed speed - everything is perfectly fine. > > I'll go and do some further digging into this, but it's good to see > that I can squeeze decently high throughput out of the 2x2 NICs. I'm getting right at 250Mbps of UDP payload received when using a 2x2 AR9382 NIC (WPEA-121N) in a Lenovo X220i (with hacked white-listed BIOS). AP is a 3x3 AR9380 NIC (WPEA_127N) in Atom based network appliance. Open-air connection, about 3 feet apart. This is in the 'download' direction: Wired to Station. HT-40 on 5Ghz. The rates bounce around a bit...down to 240Mbps or so for a bit, then back to 250Mbps. Might be some other interference around as this is a relatively noisy environment... Upload speed seems to be a constant 243Mbps..at least at this moment. Kernel is 3.3.7+. Thanks, Ben -- Ben Greear Candela Technologies Inc http://www.candelatech.com