[ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

[ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

[Bernhard Walle]

Hello ath9k experts,

can somebody explain what

> [...]
>            PHY ERR :      96196
> [...]
>           UNDERRUN :      96196
> [...]

in /sys/kernel/debug/ath9k/phy0/recv actually means. Is that normal, or
a hardware problem, or a driver problem?

Thanks for any pointers!


Regards,
Bernhard

[ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

[Bernhard Walle]

Hi again,

Am 11.01.2011 17:24, schrieb Bernhard Walle:
> 
> can somebody explain what
> 
>> [...]
>>            PHY ERR :      96196
>> [...]
>>           UNDERRUN :      96196
>> [...]
> 
> in /sys/kernel/debug/ath9k/phy0/recv actually means. Is that normal, or
> a hardware problem, or a driver problem?
> 
> Thanks for any pointers!

Does that really nobody know? Anyone else seeing that problem?


Regards,
Bernhard

[ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

[Mohammed Shafi]

On Thu, Jan 20, 2011 at 3:23 PM, Bernhard Walle <walle@corscience.de> wrote:
> Hi again,
>
> Am 11.01.2011 17:24, schrieb Bernhard Walle:
>>
>> can somebody explain what
>>
>>> [...]
>>> ? ? ? ? ? ?PHY ERR : ? ? ?96196
>>> [...]
>>> ? ? ? ? ? UNDERRUN : ? ? ?96196
>>> [...]
>>
>> in /sys/kernel/debug/ath9k/phy0/recv actually means. Is that normal, or
>> a hardware problem, or a driver problem?
>>
>> Thanks for any pointers!
>
> Does that really nobody know? Anyone else seeing that problem?

Hi I had seen PHY_ERR but not of this much frequency.
have not seen UNDERRUN errors like this
what card are you using ? and kernel /compat wireless

>
>
> Regards,
> Bernhard
> _______________________________________________
> ath9k-devel mailing list
> ath9k-devel at lists.ath9k.org
> https://lists.ath9k.org/mailman/listinfo/ath9k-devel
>

[ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

[Bernhard Walle]

Hello,

Am 20.01.2011 11:07, schrieb Mohammed Shafi:
> On Thu, Jan 20, 2011 at 3:23 PM, Bernhard Walle <walle@corscience.de> wrote:
>> Am 11.01.2011 17:24, schrieb Bernhard Walle:
>>>
>>> can somebody explain what
>>>
>>>> [...]
>>>>            PHY ERR :      96196
>>>> [...]
>>>>           UNDERRUN :      96196
>>>> [...]
>>>
>>> in /sys/kernel/debug/ath9k/phy0/recv actually means. Is that normal, or
>>> a hardware problem, or a driver problem?
>>>
>>> Thanks for any pointers!
>>
>> Does that really nobody know? Anyone else seeing that problem?
> 
> Hi I had seen PHY_ERR but not of this much frequency.
> have not seen UNDERRUN errors like this
> what card are you using ? and kernel /compat wireless

I'm using a SparkLAN WPEA-111N with 2.6.37 vanilla driver/kernel. I'm
seeing that error only on the AP side, not the STA side.


Regards,
Bernhard

[ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

[Mohammed Shafi]

On Thu, Jan 20, 2011 at 3:43 PM, Bernhard Walle <walle@corscience.de> wrote:
> Hello,
>
> Am 20.01.2011 11:07, schrieb Mohammed Shafi:
>> On Thu, Jan 20, 2011 at 3:23 PM, Bernhard Walle <walle@corscience.de> wrote:
>>> Am 11.01.2011 17:24, schrieb Bernhard Walle:
>>>>
>>>> can somebody explain what
>>>>
>>>>> [...]
>>>>> ? ? ? ? ? ?PHY ERR : ? ? ?96196
>>>>> [...]
>>>>> ? ? ? ? ? UNDERRUN : ? ? ?96196
>>>>> [...]
>>>>
>>>> in /sys/kernel/debug/ath9k/phy0/recv actually means. Is that normal, or
>>>> a hardware problem, or a driver problem?
>>>>
>>>> Thanks for any pointers!
>>>
>>> Does that really nobody know? Anyone else seeing that problem?
>>
>> Hi I had seen PHY_ERR but not of this much frequency.
>> have not seen UNDERRUN errors like this
>> what card are you using ? and kernel /compat wireless
>
> I'm using a SparkLAN WPEA-111N with 2.6.37 vanilla driver/kernel. I'm
> seeing that error only on the AP side, not the STA side.

Ok, I referred to station(AR9280) and yours also same i think.
Have not tested it in AP.


>
>
> Regards,
> Bernhard
>

[ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

[Luis R. Rodriguez]

On Tue, Jan 11, 2011 at 8:24 AM, Bernhard Walle <walle@corscience.de> wrote:
> Hello ath9k experts,
>
> can somebody explain what
>
>> [...]
>> ? ? ? ? ? ?PHY ERR : ? ? ?96196
>> [...]
>> ? ? ? ? ? UNDERRUN : ? ? ?96196
>> [...]
>
> in /sys/kernel/debug/ath9k/phy0/recv actually means. Is that normal, or
> a hardware problem, or a driver problem?

Kyungwan has explained to me:

We have 3 types of underrun, fifo_underrun, tx_data_underrun_err and
tx_dlmtr_underrun_err. All 3 underruns happen because there is not
enough data for transmission. But when happens and how to handle are
slightly different for each type.

  Luis

[ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

[Bernhard Walle]

Hi Luis,

thanks for your reply!

Am 20.01.2011 23:39, schrieb Luis R. Rodriguez:
> On Tue, Jan 11, 2011 at 8:24 AM, Bernhard Walle <walle@corscience.de> wrote:
>>
>> can somebody explain what
>>
>>> [...]
>>>            PHY ERR :      96196
>>> [...]
>>>           UNDERRUN :      96196
>>> [...]
>>
>> in /sys/kernel/debug/ath9k/phy0/recv actually means. Is that normal, or
>> a hardware problem, or a driver problem?
> 
> Kyungwan has explained to me:
> 
> We have 3 types of underrun, fifo_underrun, tx_data_underrun_err and
> tx_dlmtr_underrun_err. All 3 underruns happen because there is not
> enough data for transmission. But when happens and how to handle are
> slightly different for each type.

And what does it mean? Is that critical? Normal?


Regards,
Bernhard

[ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

[Kyungwan Nam]

Hi Bernhard, 

Typically Tx underrun can be seen at high MCS rate because it's not fast enough to fetch the data to transmit but typically it's temporal and transient and we can ignore it. However, if Tx underrun keeps happening or happens frequently, then we need to put our effort on investigation. Thanks!

Regards,
Kyungwan

-----Original Message-----
From: Bernhard Walle [mailto:walle at corscience.de] 
Sent: Friday, January 21, 2011 12:43 AM
To: Luis R. Rodriguez
Cc: ath9k-devel at lists.ath9k.org; Kyungwan Nam
Subject: Re: [ath9k-devel] UNDERRUN / PHY ERR in /sys/kernel/debug/ath9k/phy0/recv

Hi Luis,

thanks for your reply!

Am 20.01.2011 23:39, schrieb Luis R. Rodriguez:
> On Tue, Jan 11, 2011 at 8:24 AM, Bernhard Walle <walle@corscience.de> wrote:
>>
>> can somebody explain what
>>
>>> [...]
>>>            PHY ERR :      96196
>>> [...]
>>>           UNDERRUN :      96196
>>> [...]
>>
>> in /sys/kernel/debug/ath9k/phy0/recv actually means. Is that normal, or
>> a hardware problem, or a driver problem?
> 
> Kyungwan has explained to me:
> 
> We have 3 types of underrun, fifo_underrun, tx_data_underrun_err and
> tx_dlmtr_underrun_err. All 3 underruns happen because there is not
> enough data for transmission. But when happens and how to handle are
> slightly different for each type.

And what does it mean? Is that critical? Normal?


Regards,
Bernhard