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Date:   Thu, 04 Feb 2021 08:47:28 +0530
From:   Karthikeyan periyasamy <periyasa@codeaurora.org>
To:     Peter Oh <peter.oh@eero.com>
Cc:     ath11k@lists.infradead.org, linux-wireless@vger.kernel.org
Subject: Re: [PATCH] ath11k: Update tx descriptor search index properly
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On 2021-02-04 08:38, Peter Oh wrote:
> On 2/3/21 5:08 PM, Karthikeyan periyasamy wrote:
>> On 2021-02-04 00:59, Peter Oh wrote:
>>> On 1/26/21 6:46 PM, Karthikeyan periyasamy wrote:
>>>> On 2020-12-19 00:53, Peter Oh wrote:
>>>>> On 12/18/20 7:24 AM, Karthikeyan Periyasamy wrote:
>>>>>> Tx descriptor search index field should be updated with hw peer id
>>>>>> and not by AST Hash. Incorrect search index causes throughput 
>>>>>> degradation
>>>>>> in all the platforms. so updated the search index field with hw 
>>>>>> peer id,
>>>>>> which is a common change applicable for all the platforms.
>>>>>> 
>>>>>> Tested-on: IPQ8074 hw2.0 AHB 
>>>>>> WLAN.HK.2.4.0.1-01492-QCAHKSWPL_SILICONZ-1
>>>>>> 
>>>>>> diff --git a/drivers/net/wireless/ath/ath11k/peer.c 
>>>>>> b/drivers/net/wireless/ath/ath11k/peer.c
>>>>>> index b69e7eb..f49abefa 100644
>>>>>> --- a/drivers/net/wireless/ath/ath11k/peer.c
>>>>>> +++ b/drivers/net/wireless/ath/ath11k/peer.c
>>>>>> 
>>>>>> @@ -309,7 +310,11 @@ int ath11k_peer_create(struct ath11k *ar, 
>>>>>> struct ath11k_vif *arvif,
>>>>>>         peer->pdev_idx = ar->pdev_idx;
>>>>>>       peer->sta = sta;
>>>>>> -    arvif->ast_hash = peer->ast_hash;
>>>>>> +
>>>>>> +    if (arvif->vif->type == NL80211_IFTYPE_STATION) {
>>>>>> +        arvif->ast_hash = peer->ast_hash;
>>>>>> +        arvif->ast_idx = peer->hw_peer_id;
>>>>>> +    }
>>>>> 
>>>>> How about non STATION type?
>>>>> 
>>>> 
>>>> no need of configuring the ast_idx, ast_hash field for non station 
>>>> type. Its recommended by HW/FW team.
>>>> 
>>> Can you add this comment in commit message?
>>> 
>> 
>> sure
>> 
>>> Also could you include the answer to "what conditions you observed 
>>> the
>>> throughput degradation?" in commit message too?
>> 
>> In all the scenario will see degradation. Its a general improvement.
>> 
> It sounds good and it will better if you share the number before and
> after the patch.

I have seen 10% increase in WDS scenario.

Thanks,
Karthikeyan P