Date: Wed, 18 Feb 2009 10:54:14 +0100 From: Bengt Ahlgren <bengta@sics.se> To: Sam Leffler <sam@freebsd.org> Cc: freebsd-mobile@freebsd.org Subject: Re: Problems with ath at kern.hz=100 Message-ID: <uh7eixwm5o9.fsf@P142.sics.se> In-Reply-To: <499B1E7B.2030908@freebsd.org> (Sam Leffler's message of "Tue\, 17 Feb 2009 12\:30\:51 -0800") References: <uh7iqnjzzi9.fsf@P142.sics.se> <20090210154047.N38905@sola.nimnet.asn.au> <4991ABA0.4050300@freebsd.org> <uh7fximfatw.fsf@P142.sics.se> <4991DB1F.7060809@freebsd.org> <uh7y6w4zwsq.fsf@P142.sics.se> <499B1E7B.2030908@freebsd.org>
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Sam Leffler <sam@freebsd.org> writes: > Bengt Ahlgren wrote: >> Sam Leffler <sam@freebsd.org> 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? Bengt
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