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Message-ID: <81fda000-4562-431d-ad47-7fdec469b0dc@onway.ch>
Date: Fri, 8 Mar 2024 15:13:00 +0100
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Subject: Re: regression: [PATCH] wifi: mac80211: set station RX-NSS on
 reconfig
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To: Johannes Berg <johannes@sipsolutions.net>, linux-wireless@vger.kernel.org
References: <014a25e4-5609-4e3e-a593-8a2bf1bd5568@onway.ch>
 <29f7aa2c233277ab4bb56bcff8e228036ee96a2e.camel@sipsolutions.net>
From: Andreas Tobler <andreas.tobler@onway.ch>
In-Reply-To: <29f7aa2c233277ab4bb56bcff8e228036ee96a2e.camel@sipsolutions.net>
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On 08.03.2024 13:19, Johannes Berg wrote:
> On Fri, 2024-03-08 at 12:58 +0100, Andreas Tobler wrote:
>> Hello Johannes, all.
>>
>> with this commit[0] we encounter a performance regression in one of our
>> AP/STA tests. The performance drop is about 100Mbps+
>>
>> Our setup is a hostap (2.10) configured AP on 802.11ac, channel 46.
>> (40MHz). The client connects via wpa (2.10) and then we produce traffic.
>> Before this commit, the throughput was around 250 Mbps, with this commit
>> the performance is now down to 135 Mbps.
>>
>> The wifi cards we use are WLE600VX from compex, a ath10k based one. The
>> kernel we're on is 6.1.80. We've seen it on 6.6 too but didn't investigate.
>>
>> Now, the ieee80211_sta_set_rx_nss() function has two FIXME comments. One
>> in where it handles the ht capability and one in the vht part. Both
>> FIXME's are: 'consider rx_highest?'
>>
> 
> I think you'll find that all that is unrelated, and this fixes it:

[link dropped since outlook garbles it completely]

Amazing! I can confirm that my performance drop has gone.
Thank you very much!
Andreas

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