linux-kernel - Re: [Ilw] Re: 3.4-rc2, ilwagn still most of the time completely unusable

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Date:	Wed, 25 Jul 2012 12:07:31 +0900
From:	Norbert Preining <preining@...ic.at>
To:	Johannes Berg <johannes@...solutions.net>
Cc:	"Venkataraman, Meenakshi" <meenakshi.venkataraman@...el.com>,
	"Lin, Hsien KuoX" <hsien.kuox.lin@...el.com>,
	"ilw@...ux.intel.com" <ilw@...ux.intel.com>,
	"linux-wireless@...r.kernel.org" <linux-wireless@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Emmanuel Grumbach <egrumbach@...il.com>
Subject: Re: [Ilw]  Re: 3.4-rc2, ilwagn still most of the time completely
	unusable

Hi Johannes,

Sorry for the late reply, I was travelling around the world ...
I have now tested the =2 and =4 settings at home, with the following
outcome:

On Do, 12 Jul 2012, Johannes Berg wrote:
> With the latest, I've extended 11n_disable to have more bits.
> 
> 11n_disable=1 will disable HT completely
> 11n_disable=2 will disable TX aggregation
> 11n_disable=4 will disable RX aggregation

11n_disabled=2:
lots of messages
  Open BA session requested for 00:0a:79:eb:56:10 tid 0
  BA request denied - HW unavailable for tid 0
and
  Rx BA session stop requested for 00:0a:79:eb:56:10 tid 0 inititator reason: 0
  Rx A-MPDU request on tid 0 result 0

Connection is stable for quite some time, but after 1-2 hours I got
a bad hang, grinding to a halt. pings to kernel.org gives 26% 
packet loss, but the rest of the packets are fast 130ms 

(Isn't that a strange thing - 25+% packet loss and all others are fast?)
I assume the packaet loss is related to the above messages.


11n_disabled=4:

lots of messages
  Rx A-MPDU request on tid 0 result -22
and at some point ping timeouts of 80+ secs (!) and then total hang
(as far as I remember)

Best wishes

Norbert
------------------------------------------------------------------------
Norbert Preining            preining@...ist.ac.jp, logic.at, debian.org}
JAIST, Japan                                 TeX Live & Debian Developer
DSA: 0x09C5B094   fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
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