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Subject: Re: [PATCH] ath11k: Add dynamic tcl ring selection logic with retry
 mechanism
From:   Kalle Valo <kvalo@codeaurora.org>
In-Reply-To: <1586782622-22570-1-git-send-email-srirrama@codeaurora.org>
References: <1586782622-22570-1-git-send-email-srirrama@codeaurora.org>
To:     Sriram R <srirrama@codeaurora.org>
Cc:     ath11k@lists.infradead.org, linux-wireless@vger.kernel.org,
        Sriram R <srirrama@codeaurora.org>
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Message-Id: <20200415080753.02F66C43636@smtp.codeaurora.org>
Date:   Wed, 15 Apr 2020 08:07:52 +0000 (UTC)
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Sriram R <srirrama@codeaurora.org> wrote:

> IPQ8074 HW supports three TCL rings for tx. Currently these rings
> are mapped based on the Access categories, viz. VO, VI, BE, BK.
> In case, one of the traffic type dominates, then it could stress
> the same tcl rings. Rather, it would be optimal to make use of all
> the rings in a round robin fashion irrespective of the traffic type
> so that the load could be evenly distributed among all the rings.
> Also, in case the selected ring is busy or full, a retry mechanism
> is used to ensure other available ring is selected without dropping
> the packet.
> 
> In SMP systems, this change avoids a single CPU from getting hogged
> when heavy traffic of same category is transmitted.
> The tx completion interrupts corresponding to the used tcl ring
> would be more which causes the assigned CPU to get hogged.
> Distribution of tx packets to different tcl rings helps balance
> this load.
> 
> Signed-off-by: Sriram R <srirrama@codeaurora.org>
> Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

Patch applied to ath-next branch of ath.git, thanks.

d687275b268b ath11k: Add dynamic tcl ring selection logic with retry mechanism

-- 
https://patchwork.kernel.org/patch/11485549/

https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches