[ath9k-devel] Poor ath9k AP performance vs. ath5k

[ath9k-devel] Poor ath9k AP performance vs. ath5k

[Grant]

Using my ISP's throughput test:

http://speedtest.oceanic.com

I get drastically better performance from my Netgear ath5k card in AP
mode compared to my Ubiquiti SR71-E in AP mode.  I'm connecting to
either card via a Ubiquiti SR71-E installed in my laptop.  The txpower
setting on the AP doesn't seem to make any difference.  I've tried
connecting different antennas to the Ubiquiti with no change.  Is this
to be expected?

- Grant

[ath9k-devel] Poor ath9k AP performance vs. ath5k

[Adrian Chadd]

Can you try doing some iperf testing to a local linux box, through the APs?

I'm noticing some strange issues in FreeBSD with the SR71-E, but
nothing which would cause that kind of performance issue.

Thanks,

Adrian

On 13 August 2011 12:33, Grant <emailgrant@gmail.com> wrote:
> Using my ISP's throughput test:
>
> http://speedtest.oceanic.com
>
> I get drastically better performance from my Netgear ath5k card in AP
> mode compared to my Ubiquiti SR71-E in AP mode. ?I'm connecting to
> either card via a Ubiquiti SR71-E installed in my laptop. ?The txpower
> setting on the AP doesn't seem to make any difference. ?I've tried
> connecting different antennas to the Ubiquiti with no change. ?Is this
> to be expected?
>
> - Grant
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>

[ath9k-devel] Poor ath9k AP performance vs. ath5k

[Luca Olivetti]

Al 13/08/11 06:33, En/na Grant ha escrit:
> I get drastically better performance from my Netgear ath5k card in AP
> mode compared to my Ubiquiti SR71-E in AP mode.  I'm connecting to
> either card via a Ubiquiti SR71-E installed in my laptop.  The txpower
> setting on the AP doesn't seem to make any difference.  I've tried
> connecting different antennas to the Ubiquiti with no change.  Is this
> to be expected?


Yes, I have another chip (ar9223) but same poor performance (around 7Mbps, IIRC).

Bye
-- 
Luca

[ath9k-devel] Poor ath9k AP performance vs. ath5k

[Grant]

> Can you try doing some iperf testing to a local linux box, through the APs?

Here's what I came up with pertaining to the SR71-E:

1. the performance of 802.11n in AP mode is good, about 15Mbit/s
2. the performance of 802.11g in AP mode is horrible, very unreliable
and just a few hundred Kbit/s at best
3. the performance of 802.11b in AP mode is good, about 4.5Mbit/s

The same iperf tests with a Netgear ath5k card:

1. the performance of 802.11g in AP mode should be better, about 5.5Mbit/s
2. the performance of 802.11b in AP mode is good, 4.5Mbit/s

> I'm noticing some strange issues in FreeBSD with the SR71-E, but
> nothing which would cause that kind of performance issue.

What sort of things are you seeing from the SR71-E?

- Grant


> Thanks,
>
> Adrian
>
> On 13 August 2011 12:33, Grant <emailgrant@gmail.com> wrote:
>> Using my ISP's throughput test:
>>
>> http://speedtest.oceanic.com
>>
>> I get drastically better performance from my Netgear ath5k card in AP
>> mode compared to my Ubiquiti SR71-E in AP mode. ?I'm connecting to
>> either card via a Ubiquiti SR71-E installed in my laptop. ?The txpower
>> setting on the AP doesn't seem to make any difference. ?I've tried
>> connecting different antennas to the Ubiquiti with no change. ?Is this
>> to be expected?
>>
>> - Grant

[ath9k-devel] Poor ath9k AP performance vs. ath5k

[Adrian Chadd]

Oh, I see fine 11g behaviour.

Can you do some iperf tests both to and from the AP, and contrast?
(ie, with the AP mostly TXing, and the AP mostly RXing.)

Adrian

On 14 August 2011 02:59, Grant <emailgrant@gmail.com> wrote:
>> Can you try doing some iperf testing to a local linux box, through the APs?
>
> Here's what I came up with pertaining to the SR71-E:
>
> 1. the performance of 802.11n in AP mode is good, about 15Mbit/s
> 2. the performance of 802.11g in AP mode is horrible, very unreliable
> and just a few hundred Kbit/s at best
> 3. the performance of 802.11b in AP mode is good, about 4.5Mbit/s
>
> The same iperf tests with a Netgear ath5k card:
>
> 1. the performance of 802.11g in AP mode should be better, about 5.5Mbit/s
> 2. the performance of 802.11b in AP mode is good, 4.5Mbit/s
>
>> I'm noticing some strange issues in FreeBSD with the SR71-E, but
>> nothing which would cause that kind of performance issue.
>
> What sort of things are you seeing from the SR71-E?
>
> - Grant
>
>
>> Thanks,
>>
>> Adrian
>>
>> On 13 August 2011 12:33, Grant <emailgrant@gmail.com> wrote:
>>> Using my ISP's throughput test:
>>>
>>> http://speedtest.oceanic.com
>>>
>>> I get drastically better performance from my Netgear ath5k card in AP
>>> mode compared to my Ubiquiti SR71-E in AP mode. ?I'm connecting to
>>> either card via a Ubiquiti SR71-E installed in my laptop. ?The txpower
>>> setting on the AP doesn't seem to make any difference. ?I've tried
>>> connecting different antennas to the Ubiquiti with no change. ?Is this
>>> to be expected?
>>>
>>> - Grant
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>

[ath9k-devel] Poor ath9k AP performance vs. ath5k

[Grant]

> Oh, I see fine 11g behaviour.
>
> Can you do some iperf tests both to and from the AP, and contrast?
> (ie, with the AP mostly TXing, and the AP mostly RXing.)
>
> Adrian

I've found that I can't connect to the SR71-E intermittently so I've
removed it from the system altogether for now.  I've spent way too
much time on wifi experimentation lately but I'll reinstall it and run
some more tests soon.  Has anyone else been unable to connect to the
SR71-E in AP mode intermittently?  ifconfig and iwconfig look fine but
I can't connect even after shutting down and starting up again.  I've
run into this problem a few times with the SR71-E and I'm always able
to connect again eventually, but this last time I gave up and
installed my Netgear ath5k card which works great in AP mode all the
time.

- Grant


>>> Can you try doing some iperf testing to a local linux box, through the APs?
>>
>> Here's what I came up with pertaining to the SR71-E:
>>
>> 1. the performance of 802.11n in AP mode is good, about 15Mbit/s
>> 2. the performance of 802.11g in AP mode is horrible, very unreliable
>> and just a few hundred Kbit/s at best
>> 3. the performance of 802.11b in AP mode is good, about 4.5Mbit/s
>>
>> The same iperf tests with a Netgear ath5k card:
>>
>> 1. the performance of 802.11g in AP mode should be better, about 5.5Mbit/s
>> 2. the performance of 802.11b in AP mode is good, 4.5Mbit/s
>>
>>> I'm noticing some strange issues in FreeBSD with the SR71-E, but
>>> nothing which would cause that kind of performance issue.
>>
>> What sort of things are you seeing from the SR71-E?
>>
>> - Grant
>>
>>
>>> Thanks,
>>>
>>> Adrian
>>>
>>> On 13 August 2011 12:33, Grant <emailgrant@gmail.com> wrote:
>>>> Using my ISP's throughput test:
>>>>
>>>> http://speedtest.oceanic.com
>>>>
>>>> I get drastically better performance from my Netgear ath5k card in AP
>>>> mode compared to my Ubiquiti SR71-E in AP mode. ?I'm connecting to
>>>> either card via a Ubiquiti SR71-E installed in my laptop. ?The txpower
>>>> setting on the AP doesn't seem to make any difference. ?I've tried
>>>> connecting different antennas to the Ubiquiti with no change. ?Is this
>>>> to be expected?
>>>>
>>>> - Grant

[ath9k-devel] Poor ath9k AP performance vs. ath5k

[Grant]

> Oh, I see fine 11g behaviour.
>
> Can you do some iperf tests both to and from the AP, and contrast?
> (ie, with the AP mostly TXing, and the AP mostly RXing.)

OK, I couldn't resist so I reinstalled the SR71-E and tested again.
802.11g seems to be working fine now.  I get 7.75Mbit/s from 802.11g.
I get 5.25Mbit/s from 802.11b and anywhere from 3-4Mbit/s from 802.11n
so I think I have an interference problem on channel 11.  I get
10-13Mbit/s from 802.11n on channel 1.  I can't get 5Ghz to work at
all so I'll start a separate thread for that.

- Grant


> Adrian
>
> On 14 August 2011 02:59, Grant <emailgrant@gmail.com> wrote:
>>> Can you try doing some iperf testing to a local linux box, through the APs?
>>
>> Here's what I came up with pertaining to the SR71-E:
>>
>> 1. the performance of 802.11n in AP mode is good, about 15Mbit/s
>> 2. the performance of 802.11g in AP mode is horrible, very unreliable
>> and just a few hundred Kbit/s at best
>> 3. the performance of 802.11b in AP mode is good, about 4.5Mbit/s
>>
>> The same iperf tests with a Netgear ath5k card:
>>
>> 1. the performance of 802.11g in AP mode should be better, about 5.5Mbit/s
>> 2. the performance of 802.11b in AP mode is good, 4.5Mbit/s
>>
>>> I'm noticing some strange issues in FreeBSD with the SR71-E, but
>>> nothing which would cause that kind of performance issue.
>>
>> What sort of things are you seeing from the SR71-E?
>>
>> - Grant
>>
>>
>>> Thanks,
>>>
>>> Adrian
>>>
>>> On 13 August 2011 12:33, Grant <emailgrant@gmail.com> wrote:
>>>> Using my ISP's throughput test:
>>>>
>>>> http://speedtest.oceanic.com
>>>>
>>>> I get drastically better performance from my Netgear ath5k card in AP
>>>> mode compared to my Ubiquiti SR71-E in AP mode. ?I'm connecting to
>>>> either card via a Ubiquiti SR71-E installed in my laptop. ?The txpower
>>>> setting on the AP doesn't seem to make any difference. ?I've tried
>>>> connecting different antennas to the Ubiquiti with no change. ?Is this
>>>> to be expected?
>>>>
>>>> - Grant