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From: Larry Finger <larry.finger@lwfinger.net>
To: Johannes Berg <johannes@sipsolutions.net>
Cc: Mattias Nissler <mattias.nissler@gmx.de>,
	"John W. Linville" <linville@tuxdriver.com>,
	linux-wireless <linux-wireless@vger.kernel.org>,
	Michael Wu <flamingice@sourmilk.net>
Subject: Re: [RFC/T][PATCH][V3] mac80211: Exponential moving average	estimate for rc80211_simple
Date: Tue, 27 Nov 2007 09:07:55 -0600	[thread overview]
Message-ID: <474C32CB.9090301@lwfinger.net> (raw)
In-Reply-To: <1196172814.6058.23.camel@johannes.berg>

Johannes Berg wrote:
> On Mon, 2007-11-26 at 22:30 +0100, Mattias Nissler wrote:
>> This changes rc80211_simple failed frame percentage estimation to use an
>> exponential moving average method. Failed frames percentage is sampled over
>> time and a smoothed average is computed. This average is examined periodically
>> and the rate adjusted eventually.
>>
>> Compared to the old method this new approach is much more responsive. The old
>> method used plain tx success/failure counters. This made rate control very
>> unresponsive after a short time of using the interface, since old data wouldn't
>> age properly.
> 
> Sounds sane and better than before. If it works we can apply this I
> guess.

I have not done any rigorous testing of this patch; however, it has not caused any harm on my system.

Larry

  reply	other threads:[~2007-11-27 15:07 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-11-26 21:30 [RFC/T][PATCH][V3] mac80211: Exponential moving average estimate for rc80211_simple Mattias Nissler
2007-11-27 14:13 ` Johannes Berg
2007-11-27 15:07   ` Larry Finger [this message]
2007-11-27 21:30     ` Mattias Nissler
2007-11-27 22:01       ` Larry Finger
2007-11-27 21:29   ` Mattias Nissler
2007-11-27 15:35 ` Stefano Brivio
2007-11-27 21:38   ` Mattias Nissler
2007-11-27 23:29     ` Stefano Brivio
2007-11-28 16:34       ` Mattias Nissler
2007-11-28 17:43         ` Stefano Brivio
2007-11-29  1:59           ` Mattias Nissler
2007-11-29  4:02             ` Stefano Brivio

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