avg-signal is weird in ath9k in 3.3.0

avg-signal is weird in ath9k in 3.3.0

[Ben Greear]

I'm testing out some code to get a stations's avg-signal through ethtool-stats,
and both it and /proc/net/wireless show ranges bouncing all over
(from around -48 to -110) on an interface running heavy traffic.

Are there any known bugs in 3.3.0 related to this?

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

Re: avg-signal is weird in ath9k in 3.3.0

[Ben Greear]

On 03/20/2012 12:47 PM, Ben Greear wrote:
> I'm testing out some code to get a stations's avg-signal through ethtool-stats,
> and both it and /proc/net/wireless show ranges bouncing all over
> (from around -48 to -110) on an interface running heavy traffic.
>
> Are there any known bugs in 3.3.0 related to this?

Same with iw station dump:

[root@lec2010-ath9k-1 lanforge]# iw dev sta1 station dump
Station 00:88:99:88:99:01 (on sta1)
	inactive time:	2 ms
	rx bytes:	3646300587
	rx packets:	10768068
	tx bytes:	3444260988
	tx packets:	10706688
	tx retries:	187471399
	tx failed:	2
	signal:  	-47 dBm
	signal avg:	-64 dBm
	tx bitrate:	130.0 MBit/s MCS 15
[root@lec2010-ath9k-1 lanforge]# iw dev sta1 station dump
Station 00:88:99:88:99:01 (on sta1)
	inactive time:	1 ms
	rx bytes:	3655139651
	rx packets:	10775853
	tx bytes:	3452330988
	tx packets:	10714184
	tx retries:	187604280
	tx failed:	2
	signal:  	16 dBm
	signal avg:	-92 dBm
	tx bitrate:	130.0 MBit/s MCS 15

Thanks,
Ben

>
> Thanks,
> Ben
>


-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com

Re: avg-signal is weird in ath9k in 3.3.0

[Felix Fietkau]

On 2012-03-20 8:47 PM, Ben Greear wrote:
> I'm testing out some code to get a stations's avg-signal through ethtool-stats,
> and both it and /proc/net/wireless show ranges bouncing all over
> (from around -48 to -110) on an interface running heavy traffic.
> 
> Are there any known bugs in 3.3.0 related to this?
As far as I know, this bug has always been there (RSSI values for A-MPDU
subframes are invalid, except for the last subframe).
I've sent fixes for this, which will show up in 3.4

- Felix

Re: avg-signal is weird in ath9k in 3.3.0

[Ben Greear]

On 03/20/2012 03:22 PM, Felix Fietkau wrote:
> On 2012-03-20 8:47 PM, Ben Greear wrote:
>> I'm testing out some code to get a stations's avg-signal through ethtool-stats,
>> and both it and /proc/net/wireless show ranges bouncing all over
>> (from around -48 to -110) on an interface running heavy traffic.
>>
>> Are there any known bugs in 3.3.0 related to this?
> As far as I know, this bug has always been there (RSSI values for A-MPDU
> subframes are invalid, except for the last subframe).
> I've sent fixes for this, which will show up in 3.4

I found the two patches and they apply cleanly to 3.3.0, and it
does appear to fix the problem.

Thanks,
Ben

-- 
Ben Greear <greearb@candelatech.com>
Candela Technologies Inc  http://www.candelatech.com