ath: tx-rate stops adapting after a while

[Petar Bogdanovic]

On Mon, Apr 25, 2011 at 04:15:11PM +0200, Petar Bogdanovic wrote:
> On Mon, Apr 25, 2011 at 09:53:22PM +0800, Adrian Chadd wrote:
> > 
> > Would you mind trying -head first? Just so you are running the same
> > code as i am?
> 
> Sure, I'll just need some time to do it right since this box is part of
> a custom build-framework and upgrading isn't as straight-forward as one
> would think it is.
> 
> Will report back as soon as it runs HEAD

All right, the board is now running:

	$ ident work/8.1-RC2/kernel | grep ath
	     $FreeBSD: src/sys/dev/ath/if_ath_pci.c,v 1.26 2011/03/31 08:07:13 adrian Exp $
	     $FreeBSD: src/sys/dev/ath/if_ath.c,v 1.325 2011/06/05 03:33:46 adrian Exp $
	     $FreeBSD: src/sys/dev/ath/if_ath_debug.c,v 1.1 2011/01/29 05:08:21 adrian Exp $
	     $FreeBSD: src/sys/dev/ath/if_ath_keycache.c,v 1.1 2011/03/02 17:19:54 adrian Exp $
	     $FreeBSD: src/sys/dev/ath/if_ath_tx.c,v 1.7 2011/03/28 11:48:49 adrian Exp $
	     $FreeBSD: src/sys/dev/ath/if_ath_tx_ht.c,v 1.16 2011/05/30 15:06:57 adrian Exp $
	     $FreeBSD: src/sys/dev/ath/if_ath_sysctl.c,v 1.5 2011/05/15 15:54:34 adrian Exp $
	     $FreeBSD: src/sys/dev/ath/ath_rate/sample/sample.c,v 1.40 2011/05/18 07:20:30 adrian Exp $
	     $FreeBSD: src/sys/dev/ath/ath_rate/sample/tx_schedules.h,v 1.2 2011/05/14 01:53:38 attilio Exp $
	     $FreeBSD: src/sys/dev/ath/ath_dfs/null/dfs_null.c,v 1.2 2011/06/04 08:24:58 adrian Exp $

compared to:

	$ ident work.old/8.1-RC2/kernel | grep ath
	     $FreeBSD: src/sys/dev/ath/if_ath.c,v 1.262.2.5.2.1 2010/06/14 02:09:06 kensmith Exp $
	     $FreeBSD: src/sys/dev/ath/if_ath_pci.c,v 1.25.2.1.4.1 2010/06/14 02:09:06 kensmith Exp $
	     $FreeBSD: src/sys/dev/ath/ath_rate/sample/sample.c,v 1.31.2.1.4.1 2010/06/14 02:09:06 kensmith Exp $

and the first thing I noticed are lower RSSI values.. around -4 for each
station but not for those sitting next to the device (~= 36).  A quick
(and flawed) benchmark didn't show any changes, though.

Let's wait and see what happens. :>

		Petar