Specific tx rates with ath10k

Specific tx rates with ath10k

[Ben Greear]

Ath10k firmware gives ability to set specific fixed rate-control rates
for beacons/mgt, multicast, broadcast, and regular traffic.

The ath10k driver only sets regular traffic currently.

I had previously hacked my firmware to just set all rate types when
ath10k driver requested to set the rate.

But, that is not what my customer needs.

So, I am now planning to add some debugfs entries to allow users to set
beacon/mgt, multicast and broadcast rates individually (I don't have time or interest
right now to try patching things top to bottom to try to get this feature
into mac80211 stack or 'iw').

My question is, for when user just runs a command like this:

./local/sbin/iw dev vap1 set bitrates legacy-2.4 6 ht-mcs-2.4

What is the desired behaviour?

Set all rates (beacons/mgt, bcast, multicast, regular) to the same
fixed speed, or just a certain subset of these traffic types?

I can make my firmware do whatever combination is required, and then
users can over-ride the values by using debugfs.....

As a note, ath10k firmware will NOT send beacons at HT speeds, so
if you fix an HT rate, then firmware will ignore that for the beacons/mgt
ratecontrol type.

Thanks,
Ben

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

Re: Specific tx rates with ath10k

[Mário Lopes]

Hi.

You can change to fixed bitrate for all types of traffic for 802.11g/a  
modes, even on ath10k:
for 2.4 GHz @ 54 Mbit/s - iw dev wiface set bitrates legacy-2.4 54
for 5 GHz @ 54 Mbit/s - iw dev wiface set bitrates legacy-5 54

Setting fixed speed for HT and VHT modes currently only takes effect  
on unicast traffic, I would like that this could be applied to other  
types of traffic in a future ath9k/ath10k driver.


Quoting Ben Greear <greearb@candelatech.com>:

> Ath10k firmware gives ability to set specific fixed rate-control rates
> for beacons/mgt, multicast, broadcast, and regular traffic.
>
> The ath10k driver only sets regular traffic currently.
>
> I had previously hacked my firmware to just set all rate types when
> ath10k driver requested to set the rate.
>
> But, that is not what my customer needs.
>
> So, I am now planning to add some debugfs entries to allow users to set
> beacon/mgt, multicast and broadcast rates individually (I don't have  
> time or interest
> right now to try patching things top to bottom to try to get this feature
> into mac80211 stack or 'iw').
>
> My question is, for when user just runs a command like this:
>
> ./local/sbin/iw dev vap1 set bitrates legacy-2.4 6 ht-mcs-2.4
>
> What is the desired behaviour?
>
> Set all rates (beacons/mgt, bcast, multicast, regular) to the same
> fixed speed, or just a certain subset of these traffic types?
>
> I can make my firmware do whatever combination is required, and then
> users can over-ride the values by using debugfs.....
>
> As a note, ath10k firmware will NOT send beacons at HT speeds, so
> if you fix an HT rate, then firmware will ignore that for the beacons/mgt
> ratecontrol type.
>
> Thanks,
> Ben
>
> --
> Ben Greear <greearb@candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>



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Re: Specific tx rates with ath10k

[Ben Greear]

On 03/13/2015 02:37 AM, Mário Lopes wrote:
> Hi.
> 
> You can change to fixed bitrate for all types of traffic for 802.11g/a modes, even on ath10k:
> for 2.4 GHz @ 54 Mbit/s - iw dev wiface set bitrates legacy-2.4 54
> for 5 GHz @ 54 Mbit/s - iw dev wiface set bitrates legacy-5 54

Have you actually tried this with an ath10k AP and seen that beacons
and broadcast go out at 54Mbps?

If so, please let me know what firmware version you are using.

> Setting fixed speed for HT and VHT modes currently only takes effect on unicast traffic, I would like that this could be applied to other types of traffic in a
> future ath9k/ath10k driver.

I know beacons won't go out at HT speeds, at least not with the
logic that I tried in the firmware...but I have not checked to
see if my patch allows setting broadcast to HT speeds....

Thanks,
Ben

> 
> 
> Quoting Ben Greear <greearb@candelatech.com>:
> 
>> Ath10k firmware gives ability to set specific fixed rate-control rates
>> for beacons/mgt, multicast, broadcast, and regular traffic.
>>
>> The ath10k driver only sets regular traffic currently.
>>
>> I had previously hacked my firmware to just set all rate types when
>> ath10k driver requested to set the rate.
>>
>> But, that is not what my customer needs.
>>
>> So, I am now planning to add some debugfs entries to allow users to set
>> beacon/mgt, multicast and broadcast rates individually (I don't have time or interest
>> right now to try patching things top to bottom to try to get this feature
>> into mac80211 stack or 'iw').
>>
>> My question is, for when user just runs a command like this:
>>
>> ./local/sbin/iw dev vap1 set bitrates legacy-2.4 6 ht-mcs-2.4
>>
>> What is the desired behaviour?
>>
>> Set all rates (beacons/mgt, bcast, multicast, regular) to the same
>> fixed speed, or just a certain subset of these traffic types?
>>
>> I can make my firmware do whatever combination is required, and then
>> users can over-ride the values by using debugfs.....
>>
>> As a note, ath10k firmware will NOT send beacons at HT speeds, so
>> if you fix an HT rate, then firmware will ignore that for the beacons/mgt
>> ratecontrol type.
>>
>> Thanks,
>> Ben
>>
>> -- 
>> Ben Greear <greearb@candelatech.com>
>> Candela Technologies Inc  http://www.candelatech.com
>>
>> -- 
>> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>
> 
> 
> 
> ----------------------------------------------------------------
> This message was sent using IMP, the Internet Messaging Program.
> 


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

Re: Specific tx rates with ath10k

[Mário Lopes]

Not on that specific setup. I'm using OpenWRT (ath9k & ath10k) and  
Ubuntu 14 (ath9k only).

There are some equipment that send broadcast traffic as unicast in  
order to reduce airtime. I don't know which, just remembered about  
that on some published papers.
I would be very usefull to transmit broadcast traffic as real  
broadcast traffic at HT/VHT speeds in order to reduce air time, which  
speed is based on last sent unicast frame speed or build a pessimist  
rate adaptation algoritm with a sort of link with rate adaptation  
algoritm used for unicast traffic.


Quoting Ben Greear <greearb@candelatech.com>:

> On 03/13/2015 02:37 AM, Mário Lopes wrote:
>> Hi.
>>
>> You can change to fixed bitrate for all types of traffic for  
>> 802.11g/a modes, even on ath10k:
>> for 2.4 GHz @ 54 Mbit/s - iw dev wiface set bitrates legacy-2.4 54
>> for 5 GHz @ 54 Mbit/s - iw dev wiface set bitrates legacy-5 54
>
> Have you actually tried this with an ath10k AP and seen that beacons
> and broadcast go out at 54Mbps?
>
> If so, please let me know what firmware version you are using.
>
>> Setting fixed speed for HT and VHT modes currently only takes  
>> effect on unicast traffic, I would like that this could be applied  
>> to other types of traffic in a
>> future ath9k/ath10k driver.
>
> I know beacons won't go out at HT speeds, at least not with the
> logic that I tried in the firmware...but I have not checked to
> see if my patch allows setting broadcast to HT speeds....
>
> Thanks,
> Ben
>
>>
>>
>> Quoting Ben Greear <greearb@candelatech.com>:
>>
>>> Ath10k firmware gives ability to set specific fixed rate-control rates
>>> for beacons/mgt, multicast, broadcast, and regular traffic.
>>>
>>> The ath10k driver only sets regular traffic currently.
>>>
>>> I had previously hacked my firmware to just set all rate types when
>>> ath10k driver requested to set the rate.
>>>
>>> But, that is not what my customer needs.
>>>
>>> So, I am now planning to add some debugfs entries to allow users to set
>>> beacon/mgt, multicast and broadcast rates individually (I don't  
>>> have time or interest
>>> right now to try patching things top to bottom to try to get this feature
>>> into mac80211 stack or 'iw').
>>>
>>> My question is, for when user just runs a command like this:
>>>
>>> ./local/sbin/iw dev vap1 set bitrates legacy-2.4 6 ht-mcs-2.4
>>>
>>> What is the desired behaviour?
>>>
>>> Set all rates (beacons/mgt, bcast, multicast, regular) to the same
>>> fixed speed, or just a certain subset of these traffic types?
>>>
>>> I can make my firmware do whatever combination is required, and then
>>> users can over-ride the values by using debugfs.....
>>>
>>> As a note, ath10k firmware will NOT send beacons at HT speeds, so
>>> if you fix an HT rate, then firmware will ignore that for the beacons/mgt
>>> ratecontrol type.
>>>
>>> Thanks,
>>> Ben
>>>
>>> --
>>> Ben Greear <greearb@candelatech.com>
>>> Candela Technologies Inc  http://www.candelatech.com
>>>
>>> --
>>> To unsubscribe from this list: send the line "unsubscribe  
>>> linux-wireless" in
>>> the body of a message to majordomo@vger.kernel.org
>>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>>>
>>
>>
>>
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>> This message was sent using IMP, the Internet Messaging Program.
>>
>
>
> --
> Ben Greear <greearb@candelatech.com>
> Candela Technologies Inc  http://www.candelatech.com
>



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