linux-kernel - Re: [PATCH 3/3] net: wireless: bcm43xx: big_buffer

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Message-Id: <200712171049.06291.mb@bu3sch.de>
Date:	Mon, 17 Dec 2007 10:49:05 +0100
From:	Michael Buesch <mb@...sch.de>
To:	mvtodevnull@...il.com
Cc:	"Larry Finger" <larry.finger@...inger.net>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	"Daniel Walker" <dwalker@...sta.com>,
	"Ray Lee" <ray-lk@...rabbit.org>,
	"Simon Holm Thøgersen" <odie@...aau.dk>,
	matthias.kaehlcke@...il.com, linux-kernel@...r.kernel.org,
	linux@...mer.net, "Ingo Molnar" <mingo@...e.hu>,
	kjwinchester@...il.com, jonathan@...masters.org,
	akpm@...ux-foundation.org, bcm43xx-dev@...ts.berlios.de
Subject: Re: [PATCH 3/3] net: wireless: bcm43xx: big_buffer_sem semaphore to mutex

On Monday 17 December 2007 08:17:58 mvtodevnull@...il.com wrote:
> On Dec 17, 2007 1:52 AM, Larry Finger <larry.finger@...inger.net> wrote:
> >
> > One major difference between bcm43xx-SoftMAC and b43-mac80211 is that the former always used a fixed
> > rate; whereas mac80211 tries to adjust the bit rate according to the transmission conditions.
> > Perhaps it isn't working quite right in your case because of some peculiarity of your AP. IIRC, you
> > have an 802.11b AP. If so, you will get the same bit speed behavior for mac80211 as for bcdm43xx by
> > issuing a 'sudo iwconfig eth1 rate 11M' command.
> 
> I don't know what happened before, but after a reboot, I can't repeat
> the 200 kB/s speed. It's back down to 40 kB/s, just like originally. I
> didn't move the laptop, or the ap, the only thing I can think of that
> might have changed is the noise level. FWIW, link quality is
> consistently the same or better with b43.
> 
> Anyway, I'd noticed before that the bit rate starts at 1 Mb/s and
> quickly scales to 11 Mb/s, but I tried setting it manually anyway and
> didn't see any change. In fact, I set the rate to 5.5 Mb/s as well as
> 1 Mb/s and the download speed was the same with all three (around
> 30-40 kB/s).

Are you working with wireless-2.6's #everything branch?

-- 
Greetings Michael.
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