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Date:      Wed, 31 Jul 2013 08:01:41 -0700
From:      Adrian Chadd <adrian@freebsd.org>
To:        Cedric GROSS <cg@cgross.info>
Cc:        freebsd-wireless@freebsd.org
Subject:   Re: Wifi rates
Message-ID:  <CAJ-Vmo=Jr_=212L8puUVuYp1mz%2BspgNAoey=wak75%2BeZ-gM7YQ@mail.gmail.com>
In-Reply-To: <001e01ce8df3$06377470$12a65d50$@info>
References:  <00b101ce8c8b$3db5f200$b921d600$@info> <CAJ-Vmo=y609_w2dMyLkgOpd24poRJKqn=LPW%2BQGi7z346xTZrQ@mail.gmail.com> <000c01ce8d07$d10a6550$731f2ff0$@info> <CAJ-Vmon0fZc6UieB7P2D5OOMDkZHP2PYJvFc2D8Sk7K-gmxWiQ@mail.gmail.com> <001e01ce8df3$06377470$12a65d50$@info>

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Hi,

Let's merge some more stuff into -HEAD first. it's likely there's some
RF configuration problem which we can dig into in more detail but I
can't do it whilst we've got broken Intel 5100 support (as then MY
laptop doesn't work!)

I have a spectrum analyser and I'm not afraid to use it.



-adrian

On 31 July 2013 06:36, Cedric GROSS <cg@cgross.info> wrote:
> Hello,
>
>>
>> Right, there's HT elements in there, so it looks likely you properly
>> negotiated HT.
>>
>>
>> > And the amrr output :
>> > Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: non-11n node
>> > Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=0, initial rate
>> 0
>>
>> That's the initial "I don't know what you are yet" selection.
>>
>> > Test kernel: wlan0: [00:24:d4:97:80:20] amrr_node_init: 11n node Test
>> > kernel: wlan0: [00:24:d4:97:80:20] AMRR: nrates=16, initial rate 128
>>
>> Here it negotiated 11n. The initial rate is 0x80, so MCS 0.
>>
>
> I made progress :
> Jul 31 14:59:40 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=11, retrycnt=0
> Jul 31 14:59:48 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=11, retrycnt=0
> Jul 31 14:59:50 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=11, retrycnt=0
> Jul 31 14:59:59 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=11, retrycnt=0
> Jul 31 15:00:01 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=11, retrycnt=0
> Jul 31 15:00:02 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=158, retrycnt=0
> Jul 31 15:00:02 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=255, retrycnt=0
> Jul 31 15:00:03 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=260, retrycnt=4
> Jul 31 15:00:03 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=160, retrycnt=0
> Jul 31 15:00:04 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=132, retrycnt=0
> Jul 31 15:00:04 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=213, retrycnt=0
> Jul 31 15:00:05 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=203, retrycnt=0
> Jul 31 15:00:05 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=214, retrycnt=0
> Jul 31 15:00:06 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=186, retrycnt=1
> Jul 31 15:00:06 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=216, retrycnt=2
> Jul 31 15:00:07 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=243, retrycnt=1
> Jul 31 15:00:08 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=185, retrycnt=0
> Jul 31 15:00:08 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=122, retrycnt=0
> Jul 31 15:00:09 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=133, retrycnt=0
> Jul 31 15:00:09 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=185, retrycnt=2
> Jul 31 15:00:10 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=165, retrycnt=0
> Jul 31 15:00:11 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=114, retrycnt=0
> Jul 31 15:00:28 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=11, retrycnt=0
> Jul 31 15:00:29 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=227, retrycnt=0
> Jul 31 15:00:29 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=255, retrycnt=0
> Jul 31 15:00:30 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=241, retrycnt=0
> Jul 31 15:00:30 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=99, retrycnt=0
> Jul 31 15:00:31 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=199, retrycnt=0
> Jul 31 15:00:31 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=111, retrycnt=2
> Jul 31 15:00:32 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=171, retrycnt=0
> Jul 31 15:00:33 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=210, retrycnt=3
> Jul 31 15:00:33 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=122, retrycnt=1
> Jul 31 15:00:34 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=218, retrycnt=0
> Jul 31 15:00:35 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=95, retrycnt=1
> Jul 31 15:00:43 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=11, retrycnt=0
> Jul 31 15:00:44 Test kernel: wlan0: [00:24:d4:97:80:20] AMRR: current rate
> 15, txcnt=22, retrycnt=0
> Jul 31 15:01:56 Test kernel: wlan0: [60:36:dd:93:34:56] amrr_node_init:
> non-11n node
> Jul 31 15:01:56 Test kernel: wlan0: [60:36:dd:93:34:56] AMRR: nrates=0,
> initial rate 0
>
> File transfer is still chaotic but start well.
> I've done a TCP dump during transfer. It's seem that TCP window fill up and
> it's why transfer stop and speed going down.
> Sometime transfer restart, sometime just hang.
>
> Just to be sure: window size value in TCP packet is the window size
> available from emitter ?
>
>>
>>
>> -adrian
>
> Cedric
>



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