From owner-freebsd-mobile@FreeBSD.ORG Wed Feb 18 16:21:13 2009 Return-Path: Delivered-To: freebsd-mobile@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2A6841065673 for ; Wed, 18 Feb 2009 16:21:13 +0000 (UTC) (envelope-from sam@freebsd.org) Received: from ebb.errno.com (ebb.errno.com [69.12.149.25]) by mx1.freebsd.org (Postfix) with ESMTP id D1B388FC15 for ; Wed, 18 Feb 2009 16:21:12 +0000 (UTC) (envelope-from sam@freebsd.org) Received: from trouble.errno.com (trouble.errno.com [10.0.0.248]) (authenticated bits=0) by ebb.errno.com (8.13.6/8.12.6) with ESMTP id n1IGLC6p085053 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Wed, 18 Feb 2009 08:21:12 -0800 (PST) (envelope-from sam@freebsd.org) Message-ID: <499C3578.9080007@freebsd.org> Date: Wed, 18 Feb 2009 08:21:12 -0800 From: Sam Leffler Organization: FreeBSD Project User-Agent: Thunderbird 2.0.0.18 (X11/20081209) MIME-Version: 1.0 To: Bengt Ahlgren References: <20090210154047.N38905@sola.nimnet.asn.au> <4991ABA0.4050300@freebsd.org> <4991DB1F.7060809@freebsd.org> <499B1E7B.2030908@freebsd.org> In-Reply-To: Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-DCC-Rhyolite-Metrics: ebb.errno.com; whitelist Cc: freebsd-mobile@freebsd.org Subject: Re: Problems with ath at kern.hz=100 X-BeenThere: freebsd-mobile@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Mobile computing with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 18 Feb 2009 16:21:13 -0000 Bengt Ahlgren wrote: > Bengt Ahlgren writes: > > >> Sam Leffler writes: >> >> >>> Bengt Ahlgren wrote: >>> >>>> Sam Leffler writes: >>>> >>>> [...] >>>> >>>> >>>> >>>>> You've removed all the context of the original problem; I can't recall >>>>> what you were trying to fix. The ps q drops might be caused by a bug >>>>> that was fixed (I think in RELENG_7). I don't see what version of >>>>> code you're running so can't tell. >>>>> >>>>> >>>> Sorry, a summary of the problem: >>>> >>>> The system frequently comes into a state where outgoing packets are >>>> held somewhere. The condition persists for seconds to minutes. It >>>> goes away by itself, but some of the packets are usually lost. This >>>> occurs on ath, FreeBSD 7.1-REL, no SMP, with kern.hz=100 (but not with >>>> hz=1000). Original mail with description can be found here: >>>> >>>> http://lists.freebsd.org/pipermail/freebsd-mobile/2009-February/011343.html >>>> >>>> I have done some more investigation, inserting debug prints in >>>> ath_start (if_ath.c 1.177.2.2.2.1), one just after IFQ_DRV_DEQUEUE >>>> (line 1576), another just before the call to ieee80211_pwrsave (line >>>> 1614). >>>> >>>> Packets are dequeued, but ieee80211_pwrsave is called and nothing >>>> happens. Below is the output from "athdebug xmit" with these extra >>>> two DPRINTF:s during the queue-up. Then after a while packets are >>>> sent again. >>>> >>>> Bengt >>>> >>>> >>>> >>> <...debug output removed...> >>> >>> Did you try RELENG_7? ap mode power save was fixed post 7.1 release. >>> >> I can do that, but I am not using ap mode. Will it still be useful? >> > > No changes were made related to sta mode. > Hmm, I see no difference in ath between 7.1-REL and RELENG_7 (besides > CVS ID strings)??? Are you meaning HEAD? If so, can I just drop in > src/sys/dev/ath from HEAD in 7.1R? > Code in HEAD is totally different. Sam