Return-path: Received: from mail30s.wh2.ocn.ne.jp ([125.206.180.198]:44486 "HELO mail30s.wh2.ocn.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1754062Ab0LGCen (ORCPT ); Mon, 6 Dec 2010 21:34:43 -0500 Received: from vs3001.wh2.ocn.ne.jp (125.206.180.229) by mail30s.wh2.ocn.ne.jp (RS ver 1.0.95vs) with SMTP id 5-0738769281 for ; Tue, 7 Dec 2010 11:34:41 +0900 (JST) From: Bruno Randolf To: Jonathan Guerin Subject: Re: ath5k: Weird Retransmission Behaviour Date: Tue, 7 Dec 2010 11:34:27 +0900 Cc: "linux-wireless" , "ath5k-devel" , nbd@openwrt.org References: <201012061714.15863.br1@einfach.org> In-Reply-To: MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Message-Id: <201012071134.27162.br1@einfach.org> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Tue December 7 2010 10:12:18 Jonathan Guerin wrote: > > Another thing that strikes me here is: why use multi rate retries if the > > rate is all the same? (Ignore the actual value of the rate, this is the > > HW rate code). > > > > Other examples: > > > > *** txdesc tries 2 > > *** mrr 0 tries 9 rate 12 > > *** mrr 1 tries 2 rate 13 > > *** mrr 2 tries 3 rate 11 > > > > = 16 transmissions in sum. > > > > *** txdesc tries 9 > > *** mrr 0 tries 3 rate 11 > > *** mrr 1 tries 9 rate 8 > > *** mrr 2 tries 3 rate 11 > > > > = 24 transmissions in sum. Again, rate[1] and rate[3] are the same, so > > why bother setting it up twice? > > I'm not sure if you still had a fixed rate set here - and I don't know > 100% how minstrel works - but it could be that minstrel is trying to > do some probing for better rates (if it was set to auto-rate)? I did not set a fixed rate, so minstrel was probing for better rates / providing alternative rates. In any case there is no reason to use the same rate twice. bruno