[ath9k-devel] Poor performance on AR5418

[ath9k-devel] Poor performance on AR5418

[Amit Sood]

connecting b/g (like wrt54g) router. I don't have 'n' router yet.

cheers,

-amit-



----- Original Message ----
From: F <mailx@aanet.com.au>
To: ath9k-devel at lists.ath9k.org
Sent: Wednesday, 27 August, 2008 9:08:05 PM
Subject: Re: [ath9k-devel] Poor performance on AR5418

Does it happen when connecting to 'n' or 'b' class networks? this could 
be network specific :/

Francis


Amit Sood wrote:
> I'm using AR5416 chipset on Linksys WMP300N v2.
>
>
>
> ----- Original Message ----
> From: sHittmeyer <hittmeyer@corscience.de>
> To: Jeremy Apthorp <nornagon@gmail.com>; ath9k-devel at lists.ath9k.org
> Sent: Wednesday, 27 August, 2008 4:11:43 PM
> Subject: Re: [ath9k-devel] Poor performance on AR5418
>
> Jeremy Apthorp schrieb:
>  
>> 2008/8/27 Luis R. Rodriguez <lrodriguez@atheros.com>:
>>  
>>    
>>> On Tue, Aug 26, 2008 at 03:47:05PM -0700, Jeremy Apthorp wrote:
>>>    
>>>      
>>>> 2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
>>>>      
>>>>        
>>>>> Link quality is not 100% correct, its actually better. We need to add
>>>>> noise floor calibration to get it to report more accurate values. So
>>>>> for now just use it as a guide. Also the rate reported by iwconfig is
>>>>> not correct, please rely on iperf for proper performance tests.
>>>>>        
>>>>>          
>>>> I was more concerned about the packet loss than the link quality or
>>>> the reported rate. Also, I tried loading google.com in a browser, and
>>>> it took several minutes.
>>>>      
>>>>        
>>> How soon after associating and getting an IP and pinging do you get
>>> packet loss? Whatever it is we definitely will need to fix it.
>>>    
>>>      
>> Directly. I didn't at any point get a good link.
>> _______________________________________________
>> ath9k-devel mailing list
>> ath9k-devel at lists.ath9k.org
>> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>
>>
>>  
>>    
> I'm using an ordinary Desktop-PC with Kubuntu and an selfbuilded 
> Kernel-2.6.26.2 / Kernel-2.6.26.rc3. with both Kernels I tried the Ath9k 
> using a D-Link DWA-547 (AR5416 inside). I simply have the same lossrate 
> of up to over 50% while connecting to a 11g network.
> So unfortunately it doesn't seam to be just a problem of AR5418.
>
> -stefan-
>
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>
>       Get an email ID as yourname at ymail.com or yourname at rocketmail.com. Click here http://in.promos.yahoo.com/address
>
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>  
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[ath9k-devel] Poor performance on AR5418

[Luis R. Rodriguez]

On Wed, Aug 27, 2008 at 07:59:29AM -0700, Amit Sood wrote:
> connecting b/g (like wrt54g) router. I don't have 'n' router yet.

A few of you have reported issues with packet loss, we only recenlty
started to be able to reproduce some of these issues and we are looking
into them and will work to resolve them ASAP.

Just so we know, do you folks have the latest patches applied?

http://w1.fi/wireless-testing/

This file outlines the order in which they should be applied:

http://w1.fi/wireless-testing/series

  Luis

[ath9k-devel] Poor performance on AR5418

[John Dong]

Beautiful, thanks for this info Luis. You guys *rock*. I will try applying
these patches and see where that takes us.


Again, thanks for all the hard work you are putting into this project!

On Wed, Aug 27, 2008 at 1:22 PM, Luis R. Rodriguez
<lrodriguez@atheros.com>wrote:

> On Wed, Aug 27, 2008 at 07:59:29AM -0700, Amit Sood wrote:
> > connecting b/g (like wrt54g) router. I don't have 'n' router yet.
>
> A few of you have reported issues with packet loss, we only recenlty
> started to be able to reproduce some of these issues and we are looking
> into them and will work to resolve them ASAP.
>
> Just so we know, do you folks have the latest patches applied?
>
> http://w1.fi/wireless-testing/
>
> This file outlines the order in which they should be applied:
>
> http://w1.fi/wireless-testing/series
>
>  Luis
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
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[ath9k-devel] Poor performance on AR5418

[F]

Ok, so the next question- is anyone out there seeing packet loss on an 
exclusively 'n' network?

Francis


Amit Sood wrote:
> connecting b/g (like wrt54g) router. I don't have 'n' router yet.
>
> cheers,
>
> -amit-
>
>
>
> ----- Original Message ----
> From: F <mailx@aanet.com.au>
> To: ath9k-devel at lists.ath9k.org
> Sent: Wednesday, 27 August, 2008 9:08:05 PM
> Subject: Re: [ath9k-devel] Poor performance on AR5418
>
> Does it happen when connecting to 'n' or 'b' class networks? this could 
> be network specific :/
>
> Francis
>
>
> Amit Sood wrote:
>   
>> I'm using AR5416 chipset on Linksys WMP300N v2.
>>
>>
>>
>> ----- Original Message ----
>> From: sHittmeyer <hittmeyer@corscience.de>
>> To: Jeremy Apthorp <nornagon@gmail.com>; ath9k-devel at lists.ath9k.org
>> Sent: Wednesday, 27 August, 2008 4:11:43 PM
>> Subject: Re: [ath9k-devel] Poor performance on AR5418
>>
>> Jeremy Apthorp schrieb:
>>  
>>     
>>> 2008/8/27 Luis R. Rodriguez <lrodriguez@atheros.com>:
>>>  
>>>    
>>>       
>>>> On Tue, Aug 26, 2008 at 03:47:05PM -0700, Jeremy Apthorp wrote:
>>>>    
>>>>      
>>>>         
>>>>> 2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
>>>>>      
>>>>>        
>>>>>           
>>>>>> Link quality is not 100% correct, its actually better. We need to add
>>>>>> noise floor calibration to get it to report more accurate values. So
>>>>>> for now just use it as a guide. Also the rate reported by iwconfig is
>>>>>> not correct, please rely on iperf for proper performance tests.
>>>>>>        
>>>>>>          
>>>>>>             
>>>>> I was more concerned about the packet loss than the link quality or
>>>>> the reported rate. Also, I tried loading google.com in a browser, and
>>>>> it took several minutes.
>>>>>      
>>>>>        
>>>>>           
>>>> How soon after associating and getting an IP and pinging do you get
>>>> packet loss? Whatever it is we definitely will need to fix it.
>>>>    
>>>>      
>>>>         
>>> Directly. I didn't at any point get a good link.
>>> _______________________________________________
>>> ath9k-devel mailing list
>>> ath9k-devel at lists.ath9k.org
>>> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>>
>>>
>>>  
>>>    
>>>       
>> I'm using an ordinary Desktop-PC with Kubuntu and an selfbuilded 
>> Kernel-2.6.26.2 / Kernel-2.6.26.rc3. with both Kernels I tried the Ath9k 
>> using a D-Link DWA-547 (AR5416 inside). I simply have the same lossrate 
>> of up to over 50% while connecting to a 11g network.
>> So unfortunately it doesn't seam to be just a problem of AR5418.
>>
>> -stefan-
>>
>> _______________________________________________
>> ath9k-devel mailing list
>> ath9k-devel at lists.ath9k.org
>> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>
>>
>>
>>       Get an email ID as yourname at ymail.com or yourname at rocketmail.com. Click here http://in.promos.yahoo.com/address
>>
>> _______________________________________________
>> ath9k-devel mailing list
>> ath9k-devel at lists.ath9k.org
>> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>
>>
>>  
>>     
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>
>       Connect with friends all over the world. Get Yahoo! India Messenger at http://in.messenger.yahoo.com/?wm=n/
>
>
>
>   

[ath9k-devel] Poor performance on AR5418

[Amit Sood]

One more thing I've observer is that with ath9k driver card's radio is not that poweful compared to ndiswrapper. If I do iwlist wlan0 scanning using ath9k card only able to find two wireless network & shows very poor signal strength even if its next to AP. however using ndiswrapper card able to scan almost 7 wireless network. I'm not sure if its something to do with radio power r not but a wild guess.

Also can I do a wireless mesh networking using ath9k driver? If yes, can anybody let me know the steps or tools?

cheers,

-amit-



----- Original Message ----
From: Amit Sood <as22_2000@yahoo.com>
To: Luis R. Rodriguez <lrodriguez@atheros.com>
Cc: "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>
Sent: Thursday, 28 August, 2008 4:26:31 PM
Subject: Re: [ath9k-devel] Poor performance on AR5418

Hi Luis,

Thanks for that. Howerver wouldn't be these patches pushed through git? I normally uses git pull to update the source.

cheers,

-amit-



----- Original Message ----
From: Luis R. Rodriguez <lrodriguez@atheros.com>
To: Amit Sood <as22_2000@yahoo.com>
Cc: F <mailx@aanet.com.au>; "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>
Sent: Thursday, 28 August, 2008 3:22:08 AM
Subject: Re: [ath9k-devel] Poor performance on AR5418

On Wed, Aug 27, 2008 at 07:59:29AM -0700, Amit Sood wrote:
> connecting b/g (like wrt54g) router. I don't have 'n' router yet.

A few of you have reported issues with packet loss, we only recenlty
started to be able to reproduce some of these issues and we are looking
into them and will work to resolve them ASAP.

Just so we know, do you folks have the latest patches applied?

http://w1.fi/wireless-testing/

This file outlines the order in which they should be applied:

http://w1.fi/wireless-testing/series

  Luis



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[ath9k-devel] Poor performance on AR5418

[Amit Sood]

Hi Luis,

Thanks for that. Howerver wouldn't be these patches pushed through git? I normally uses git pull to update the source.

cheers,

-amit-



----- Original Message ----
From: Luis R. Rodriguez <lrodriguez@atheros.com>
To: Amit Sood <as22_2000@yahoo.com>
Cc: F <mailx@aanet.com.au>; "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>
Sent: Thursday, 28 August, 2008 3:22:08 AM
Subject: Re: [ath9k-devel] Poor performance on AR5418

On Wed, Aug 27, 2008 at 07:59:29AM -0700, Amit Sood wrote:
> connecting b/g (like wrt54g) router. I don't have 'n' router yet.

A few of you have reported issues with packet loss, we only recenlty
started to be able to reproduce some of these issues and we are looking
into them and will work to resolve them ASAP.

Just so we know, do you folks have the latest patches applied?

http://w1.fi/wireless-testing/

This file outlines the order in which they should be applied:

http://w1.fi/wireless-testing/series

  Luis



      Unlimited freedom, unlimited storage. Get it now, on http://help.yahoo.com/l/in/yahoo/mail/yahoomail/tools/tools-08.html/

[ath9k-devel] Poor performance on AR5418

[Amit Sood]

I'm using AR5416 chipset on Linksys WMP300N v2.



----- Original Message ----
From: sHittmeyer <hittmeyer@corscience.de>
To: Jeremy Apthorp <nornagon@gmail.com>; ath9k-devel at lists.ath9k.org
Sent: Wednesday, 27 August, 2008 4:11:43 PM
Subject: Re: [ath9k-devel] Poor performance on AR5418

Jeremy Apthorp schrieb:
> 2008/8/27 Luis R. Rodriguez <lrodriguez@atheros.com>:
>  
>> On Tue, Aug 26, 2008 at 03:47:05PM -0700, Jeremy Apthorp wrote:
>>    
>>> 2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
>>>      
>>>> Link quality is not 100% correct, its actually better. We need to add
>>>> noise floor calibration to get it to report more accurate values. So
>>>> for now just use it as a guide. Also the rate reported by iwconfig is
>>>> not correct, please rely on iperf for proper performance tests.
>>>>        
>>> I was more concerned about the packet loss than the link quality or
>>> the reported rate. Also, I tried loading google.com in a browser, and
>>> it took several minutes.
>>>      
>> How soon after associating and getting an IP and pinging do you get
>> packet loss? Whatever it is we definitely will need to fix it.
>>    
>
> Directly. I didn't at any point get a good link.
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>  
I'm using an ordinary Desktop-PC with Kubuntu and an selfbuilded 
Kernel-2.6.26.2 / Kernel-2.6.26.rc3. with both Kernels I tried the Ath9k 
using a D-Link DWA-547 (AR5416 inside). I simply have the same lossrate 
of up to over 50% while connecting to a 11g network.
So unfortunately it doesn't seam to be just a problem of AR5418.

-stefan-

_______________________________________________
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ath9k-devel at lists.ath9k.org
https://lists.ath9k.org/mailman/listinfo/ath9k-devel



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[ath9k-devel] Poor performance on AR5418

[F]

Does it happen when connecting to 'n' or 'b' class networks? this could 
be network specific :/

Francis


Amit Sood wrote:
> I'm using AR5416 chipset on Linksys WMP300N v2.
>
>
>
> ----- Original Message ----
> From: sHittmeyer <hittmeyer@corscience.de>
> To: Jeremy Apthorp <nornagon@gmail.com>; ath9k-devel at lists.ath9k.org
> Sent: Wednesday, 27 August, 2008 4:11:43 PM
> Subject: Re: [ath9k-devel] Poor performance on AR5418
>
> Jeremy Apthorp schrieb:
>   
>> 2008/8/27 Luis R. Rodriguez <lrodriguez@atheros.com>:
>>  
>>     
>>> On Tue, Aug 26, 2008 at 03:47:05PM -0700, Jeremy Apthorp wrote:
>>>    
>>>       
>>>> 2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
>>>>      
>>>>         
>>>>> Link quality is not 100% correct, its actually better. We need to add
>>>>> noise floor calibration to get it to report more accurate values. So
>>>>> for now just use it as a guide. Also the rate reported by iwconfig is
>>>>> not correct, please rely on iperf for proper performance tests.
>>>>>        
>>>>>           
>>>> I was more concerned about the packet loss than the link quality or
>>>> the reported rate. Also, I tried loading google.com in a browser, and
>>>> it took several minutes.
>>>>      
>>>>         
>>> How soon after associating and getting an IP and pinging do you get
>>> packet loss? Whatever it is we definitely will need to fix it.
>>>    
>>>       
>> Directly. I didn't at any point get a good link.
>> _______________________________________________
>> ath9k-devel mailing list
>> ath9k-devel at lists.ath9k.org
>> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>>
>>
>>  
>>     
> I'm using an ordinary Desktop-PC with Kubuntu and an selfbuilded 
> Kernel-2.6.26.2 / Kernel-2.6.26.rc3. with both Kernels I tried the Ath9k 
> using a D-Link DWA-547 (AR5416 inside). I simply have the same lossrate 
> of up to over 50% while connecting to a 11g network.
> So unfortunately it doesn't seam to be just a problem of AR5418.
>
> -stefan-
>
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>
>       Get an email ID as yourname at ymail.com or yourname at rocketmail.com. Click here http://in.promos.yahoo.com/address
>
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>   

[ath9k-devel] Poor performance on AR5418

[Amit Sood]

Hi Luis,

I'm using static IP address on wifi interface. Its almost immediate once interface comes up, if I try to ping to gateway or any other system in same subnet the there is packet loss. If I try ssh or any other service on that interface the session becomes slow like for a while stop responsing (like used to be using dial-up service to a remote machine).

Let me know if you need any specific logs etc. I'll be more then happy to provide that.

cheers,

-amit-



----- Original Message ----
From: Jeremy Apthorp <nornagon@gmail.com>
To: Luis R. Rodriguez <lrodriguez@atheros.com>
Cc: "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>
Sent: Wednesday, 27 August, 2008 9:02:33 AM
Subject: Re: [ath9k-devel] Poor performance on AR5418

2008/8/27 Luis R. Rodriguez <lrodriguez@atheros.com>:
> On Tue, Aug 26, 2008 at 03:47:05PM -0700, Jeremy Apthorp wrote:
>> 2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
>> > Link quality is not 100% correct, its actually better. We need to add
>> > noise floor calibration to get it to report more accurate values. So
>> > for now just use it as a guide. Also the rate reported by iwconfig is
>> > not correct, please rely on iperf for proper performance tests.
>>
>> I was more concerned about the packet loss than the link quality or
>> the reported rate. Also, I tried loading google.com in a browser, and
>> it took several minutes.
>
> How soon after associating and getting an IP and pinging do you get
> packet loss? Whatever it is we definitely will need to fix it.

Directly. I didn't at any point get a good link.
_______________________________________________
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ath9k-devel at lists.ath9k.org
https://lists.ath9k.org/mailman/listinfo/ath9k-devel



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[ath9k-devel] Poor performance on AR5418

[John Dong]

I am also noticing similar packet loss on a Macbook3,1 when I'm far from my
AP. I know both OS X and madwifi can pull 8-10MBit/s from this distance but
TCP is unuseable on ath9k because of 50-75% packet loss immediately upon
connect (sometimes even DHCP fails)

On Tue, Aug 26, 2008 at 7:53 PM, Amit Sood <as22_2000@yahoo.com> wrote:

> Hi Luis,
>
> I'm using static IP address on wifi interface. Its almost immediate once
> interface comes up, if I try to ping to gateway or any other system in same
> subnet the there is packet loss. If I try ssh or any other service on that
> interface the session becomes slow like for a while stop responsing (like
> used to be using dial-up service to a remote machine).
>
> Let me know if you need any specific logs etc. I'll be more then happy to
> provide that.
>
> cheers,
>
> -amit-
>
>
>
> ----- Original Message ----
> From: Jeremy Apthorp <nornagon@gmail.com>
> To: Luis R. Rodriguez <lrodriguez@atheros.com>
> Cc: "ath9k-devel at lists.ath9k.org" <ath9k-devel@lists.ath9k.org>
> Sent: Wednesday, 27 August, 2008 9:02:33 AM
> Subject: Re: [ath9k-devel] Poor performance on AR5418
>
> 2008/8/27 Luis R. Rodriguez <lrodriguez@atheros.com>:
> > On Tue, Aug 26, 2008 at 03:47:05PM -0700, Jeremy Apthorp wrote:
> >> 2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
> >> > Link quality is not 100% correct, its actually better. We need to add
> >> > noise floor calibration to get it to report more accurate values. So
> >> > for now just use it as a guide. Also the rate reported by iwconfig is
> >> > not correct, please rely on iperf for proper performance tests.
> >>
> >> I was more concerned about the packet loss than the link quality or
> >> the reported rate. Also, I tried loading google.com in a browser, and
> >> it took several minutes.
> >
> > How soon after associating and getting an IP and pinging do you get
> > packet loss? Whatever it is we definitely will need to fix it.
>
> Directly. I didn't at any point get a good link.
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>
>       Get an email ID as yourname at ymail.com or yourname at rocketmail.com.
> Click here http://in.promos.yahoo.com/address
>
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
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[ath9k-devel] Poor performance on AR5418

[Amit Sood]

Hi Luis,

Beside the reporting from iwconfig, we are also having packet drops. I'm not sure how to resolve that. I guess OS controls the traffic on interface on the speed reported under iwconfig. That is my exp so far with wifi cards. Even if signal strength is 70-80 & speed is 1Mb, the communication really becomes choppy.

cheers,

-amit-



----- Original Message ----
From: Luis R. Rodriguez <mcgrof@gmail.com>
To: Jeremy Apthorp <nornagon@gmail.com>
Cc: ath9k-devel at lists.ath9k.org
Sent: Wednesday, 27 August, 2008 8:23:31 AM
Subject: Re: [ath9k-devel] Poor performance on AR5418

On Tue, Aug 26, 2008 at 3:09 PM, Jeremy Apthorp <nornagon@gmail.com> wrote:
> I just built and tested out kernel 2.6.27-rc4 (with ath9k drivers
> included) on my MacBook Pro 3,1. There's good news and there's bad
> news.
>
> The good news is that the AR5418 is discovered and added as a device,
> and it works! It associates and I can ping places.
>
> The bad news is that it's really, really slow. iwconfig reported a
> network speed of 1Mbps, vs. the 24Mbps+ that I get from madwifi (this
> is a g network). Link quality seems normal; it hangs around 15-30/100
> compared to around 20/70 under madwifi. However, I get 65%+ packet
> loss just pinging my router from ath9k, and zero from madwifi.
>
> Is anyone else having this problem? Is there anything I can do to help
> it get fixed? Unfortunately I don't have any experience with wifi
> drivers, so I'd not be much use for code... but I can run tests and
> collect debug info if necessary.

Link quality is not 100% correct, its actually better. We need to add
noise floor calibration to get it to report more accurate values. So
for now just use it as a guide. Also the rate reported by iwconfig is
not correct, please rely on iperf for proper performance tests.

  Luis
_______________________________________________
ath9k-devel mailing list
ath9k-devel at lists.ath9k.org
https://lists.ath9k..org/mailman/listinfo/ath9k-devel



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[ath9k-devel] Poor performance on AR5418

[Jeremy Apthorp]

I just built and tested out kernel 2.6.27-rc4 (with ath9k drivers
included) on my MacBook Pro 3,1. There's good news and there's bad
news.

The good news is that the AR5418 is discovered and added as a device,
and it works! It associates and I can ping places.

The bad news is that it's really, really slow. iwconfig reported a
network speed of 1Mbps, vs. the 24Mbps+ that I get from madwifi (this
is a g network). Link quality seems normal; it hangs around 15-30/100
compared to around 20/70 under madwifi. However, I get 65%+ packet
loss just pinging my router from ath9k, and zero from madwifi.

Is anyone else having this problem? Is there anything I can do to help
it get fixed? Unfortunately I don't have any experience with wifi
drivers, so I'd not be much use for code... but I can run tests and
collect debug info if necessary.

Thanks,
Jeremy

[ath9k-devel] Poor performance on AR5418

[Luis R. Rodriguez]

On Tue, Aug 26, 2008 at 3:09 PM, Jeremy Apthorp <nornagon@gmail.com> wrote:
> I just built and tested out kernel 2.6.27-rc4 (with ath9k drivers
> included) on my MacBook Pro 3,1. There's good news and there's bad
> news.
>
> The good news is that the AR5418 is discovered and added as a device,
> and it works! It associates and I can ping places.
>
> The bad news is that it's really, really slow. iwconfig reported a
> network speed of 1Mbps, vs. the 24Mbps+ that I get from madwifi (this
> is a g network). Link quality seems normal; it hangs around 15-30/100
> compared to around 20/70 under madwifi. However, I get 65%+ packet
> loss just pinging my router from ath9k, and zero from madwifi.
>
> Is anyone else having this problem? Is there anything I can do to help
> it get fixed? Unfortunately I don't have any experience with wifi
> drivers, so I'd not be much use for code... but I can run tests and
> collect debug info if necessary.

Link quality is not 100% correct, its actually better. We need to add
noise floor calibration to get it to report more accurate values. So
for now just use it as a guide. Also the rate reported by iwconfig is
not correct, please rely on iperf for proper performance tests.

  Luis

[ath9k-devel] Poor performance on AR5418

[Jeremy Apthorp]

2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
> On Tue, Aug 26, 2008 at 3:09 PM, Jeremy Apthorp <nornagon@gmail.com> wrote:
>> I just built and tested out kernel 2.6.27-rc4 (with ath9k drivers
>> included) on my MacBook Pro 3,1. There's good news and there's bad
>> news.
>>
>> The good news is that the AR5418 is discovered and added as a device,
>> and it works! It associates and I can ping places.
>>
>> The bad news is that it's really, really slow. iwconfig reported a
>> network speed of 1Mbps, vs. the 24Mbps+ that I get from madwifi (this
>> is a g network). Link quality seems normal; it hangs around 15-30/100
>> compared to around 20/70 under madwifi. However, I get 65%+ packet
>> loss just pinging my router from ath9k, and zero from madwifi.
>>
>> Is anyone else having this problem? Is there anything I can do to help
>> it get fixed? Unfortunately I don't have any experience with wifi
>> drivers, so I'd not be much use for code... but I can run tests and
>> collect debug info if necessary.
>
> Link quality is not 100% correct, its actually better. We need to add
> noise floor calibration to get it to report more accurate values. So
> for now just use it as a guide. Also the rate reported by iwconfig is
> not correct, please rely on iperf for proper performance tests.

I was more concerned about the packet loss than the link quality or
the reported rate. Also, I tried loading google.com in a browser, and
it took several minutes.

[ath9k-devel] Poor performance on AR5418

[Luis R. Rodriguez]

On Tue, Aug 26, 2008 at 03:47:05PM -0700, Jeremy Apthorp wrote:
> 2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
> > On Tue, Aug 26, 2008 at 3:09 PM, Jeremy Apthorp <nornagon@gmail.com> wrote:
> >> I just built and tested out kernel 2.6.27-rc4 (with ath9k drivers
> >> included) on my MacBook Pro 3,1. There's good news and there's bad
> >> news.
> >>
> >> The good news is that the AR5418 is discovered and added as a device,
> >> and it works! It associates and I can ping places.
> >>
> >> The bad news is that it's really, really slow. iwconfig reported a
> >> network speed of 1Mbps, vs. the 24Mbps+ that I get from madwifi (this
> >> is a g network). Link quality seems normal; it hangs around 15-30/100
> >> compared to around 20/70 under madwifi. However, I get 65%+ packet
> >> loss just pinging my router from ath9k, and zero from madwifi.
> >>
> >> Is anyone else having this problem? Is there anything I can do to help
> >> it get fixed? Unfortunately I don't have any experience with wifi
> >> drivers, so I'd not be much use for code... but I can run tests and
> >> collect debug info if necessary.
> >
> > Link quality is not 100% correct, its actually better. We need to add
> > noise floor calibration to get it to report more accurate values. So
> > for now just use it as a guide. Also the rate reported by iwconfig is
> > not correct, please rely on iperf for proper performance tests.
> 
> I was more concerned about the packet loss than the link quality or
> the reported rate. Also, I tried loading google.com in a browser, and
> it took several minutes.

How soon after associating and getting an IP and pinging do you get
packet loss? Whatever it is we definitely will need to fix it.

  Luis

[ath9k-devel] Poor performance on AR5418

[Jeremy Apthorp]

2008/8/27 Luis R. Rodriguez <lrodriguez@atheros.com>:
> On Tue, Aug 26, 2008 at 03:47:05PM -0700, Jeremy Apthorp wrote:
>> 2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
>> > Link quality is not 100% correct, its actually better. We need to add
>> > noise floor calibration to get it to report more accurate values. So
>> > for now just use it as a guide. Also the rate reported by iwconfig is
>> > not correct, please rely on iperf for proper performance tests.
>>
>> I was more concerned about the packet loss than the link quality or
>> the reported rate. Also, I tried loading google.com in a browser, and
>> it took several minutes.
>
> How soon after associating and getting an IP and pinging do you get
> packet loss? Whatever it is we definitely will need to fix it.

Directly. I didn't at any point get a good link.

[ath9k-devel] Poor performance on AR5418

[sHittmeyer]

Jeremy Apthorp schrieb:
> 2008/8/27 Luis R. Rodriguez <lrodriguez@atheros.com>:
>   
>> On Tue, Aug 26, 2008 at 03:47:05PM -0700, Jeremy Apthorp wrote:
>>     
>>> 2008/8/27 Luis R. Rodriguez <mcgrof@gmail.com>:
>>>       
>>>> Link quality is not 100% correct, its actually better. We need to add
>>>> noise floor calibration to get it to report more accurate values. So
>>>> for now just use it as a guide. Also the rate reported by iwconfig is
>>>> not correct, please rely on iperf for proper performance tests.
>>>>         
>>> I was more concerned about the packet loss than the link quality or
>>> the reported rate. Also, I tried loading google.com in a browser, and
>>> it took several minutes.
>>>       
>> How soon after associating and getting an IP and pinging do you get
>> packet loss? Whatever it is we definitely will need to fix it.
>>     
>
> Directly. I didn't at any point get a good link.
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>
>
>   
I'm using an ordinary Desktop-PC with Kubuntu and an selfbuilded 
Kernel-2.6.26.2 / Kernel-2.6.26.rc3. with both Kernels I tried the Ath9k 
using a D-Link DWA-547 (AR5416 inside). I simply have the same lossrate 
of up to over 50% while connecting to a 11g network.
So unfortunately it doesn't seam to be just a problem of AR5418.

-stefan-