Return-path: Received: from mail-gx0-f174.google.com ([209.85.161.174]:52475 "EHLO mail-gx0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752179Ab2DRPQn convert rfc822-to-8bit (ORCPT ); Wed, 18 Apr 2012 11:16:43 -0400 Received: by gghe5 with SMTP id e5so3727740ggh.19 for ; Wed, 18 Apr 2012 08:16:43 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <4F8ED849.4020002@sipsolutions.net> References: <4F630AEA.10703@etit.tu-chemnitz.de> <20120316204547.GG18861@tux> <4F63BA31.1080608@etit.tu-chemnitz.de> <4F856449.3000804@etit.tu-chemnitz.de> <1334203508.3788.12.camel@jlt3.sipsolutions.net> <4F868732.1030401@etit.tu-chemnitz.de> <1334714536.3725.33.camel@jlt3.sipsolutions.net> <4F8ED849.4020002@sipsolutions.net> From: Javier Cardona Date: Wed, 18 Apr 2012 08:16:14 -0700 Message-ID: (sfid-20120418_171712_669263_E51476AF) Subject: Re: [Greenmesh] [ath9k] mesh powersave hardware sleep + wakeup To: Johannes Berg Cc: Marco Porsch , "Luis R. Rodriguez" , linux-wireless@vger.kernel.org, henry@logout.com, "greenmesh@lists.osll.spb.ru" Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Wed, Apr 18, 2012 at 8:05 AM, Johannes Berg wrote: > On 4/18/2012 7:56 AM, Javier Cardona wrote: >> >> On Tue, Apr 17, 2012 at 7:02 PM, Johannes Berg >> ?wrote: >>> >>> (...) >>> Keep in mind that TSF == start of TSF field, while rx_status->timestamp >>> == start of first symbol, which I didn't even remember when you guys did >>> all the Toffset things, I'm guessing they're all wrong :-) >> >> >> I think you guessed wrong :) > > > Nice! FWIW, our hardware (not that the driver supports mesh now) will give > the timestamp at the first symbol of the MPDU, so some more offset > calculations are needed and we don't give valid timestamps today. I started > working on this but haven't figured out HT preamble duration yet. Thanks for letting us know. Now we know what hardware *not* to use for this :P Javier