From owner-freebsd-mobile@FreeBSD.ORG Wed Feb 18 13:23:16 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 1143E106566B; Wed, 18 Feb 2009 13:23:16 +0000 (UTC) (envelope-from bengta@P142.sics.se) Received: from sink.sics.se (sink.sics.se [193.10.64.88]) by mx1.freebsd.org (Postfix) with ESMTP id 939FE8FC16; Wed, 18 Feb 2009 13:23:15 +0000 (UTC) (envelope-from bengta@P142.sics.se) Received: from P142.sics.se (P142.sics.se [193.10.66.253]) by sink.sics.se (8.14.3/8.14.3) with ESMTP id n1IDN6Jq062503 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 18 Feb 2009 14:23:06 +0100 (CET) (envelope-from bengta@P142.sics.se) Received: from P142.sics.se (localhost [127.0.0.1]) by P142.sics.se (8.14.3/8.14.3) with ESMTP id n1IDPBqr003093; Wed, 18 Feb 2009 14:25:11 +0100 (CET) (envelope-from bengta@P142.sics.se) Received: (from bengta@localhost) by P142.sics.se (8.14.3/8.14.3/Submit) id n1IDPBne003092; Wed, 18 Feb 2009 14:25:11 +0100 (CET) (envelope-from bengta@P142.sics.se) To: Sam Leffler From: Bengt Ahlgren In-Reply-To: (Bengt Ahlgren's message of "Wed\, 18 Feb 2009 10\:54\:14 +0100") User-Agent: Gnus/5.11 (Gnus v5.11) Emacs/22.2 (berkeley-unix) References: <20090210154047.N38905@sola.nimnet.asn.au> <4991ABA0.4050300@freebsd.org> <4991DB1F.7060809@freebsd.org> <499B1E7B.2030908@freebsd.org> Date: Wed, 18 Feb 2009 14:25:11 +0100 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii 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 13:23:16 -0000 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? 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? Bengt