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Date:      Mon, 20 Aug 2012 09:36:04 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        Slawa Olhovchenkov <slw@zxy.spb.ru>
Cc:        freebsd-wireless@freebsd.org
Subject:   Re: New ath code works well as AP
Message-ID:  <CAJ-VmonybT879YHyJk3QWa8Dru2p4ogG0hHHq-fwgOtMzgNYug@mail.gmail.com>
In-Reply-To: <20120820163118.GN98910@zxy.spb.ru>
References:  <1311732708.20120815005429@serebryakov.spb.ru> <20120819071403.GF98910@zxy.spb.ru> <CAJ-Vmompt74rHx=C8Z5L978ciFN1LnPr2Mz=5PB3a%2BdgZJ8GVA@mail.gmail.com> <20120820125524.GL98910@zxy.spb.ru> <CAJ-VmokyTZyEEeodfmzFzA07tGVAu6QJHxNBWbrJpEMUb_Etig@mail.gmail.com> <20120820160344.GM98910@zxy.spb.ru> <CAJ-Vmo=wrZmTzObjRkoyNMvSQxTEehP9m3VTwaqHmDdU_kG1sg@mail.gmail.com> <20120820163118.GN98910@zxy.spb.ru>

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On 20 August 2012 09:31, Slawa Olhovchenkov <slw@zxy.spb.ru> wrote:

>> The main issues I see right now are very likely due to noisy
>> environments and ANI behaving poorly.
>
> How you detect noisy environments?
> (some output from athsurvey?)

Yup. Look at the channel busy statistics. YOur channel isn't busy at all.

> What level of noisy is acpetable in terms of athsurvey and in terms of
> physicaly units? (I can use Cisco Spectrum Expert for survey, but not
> simultaneously with this card).

Anything bursty, wide or narrow band, will cause issues.


> What is ANI?

Ambient/Automatic Noise Immunity. There's some code which adjusts some
PHY parameters to do with signal sizing and offset; however I may have
(more) broken it.
I need to sit down and add some further debugging and write an
inspection tool or two to figure out exactly what's going on.

> What I need to try in next time of lost traffic?

> (no messages in console in this situation, nothing about "ath0: device
> timeout" nor "ath0: bb hang detected (0x4), resetting").
>
> Do I need to enable some debug?

Well, what do you mean by "lost traffic" ? I need some more
information about that.



Adrian



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