[prev in list] [next in list] [prev in thread] [next in thread] 

List:       linux-wireless
Subject:    Re: ath10k: fix throughput regression in multi client mode
From:       Kalle Valo <kvalo () qca ! qualcomm ! com>
Date:       2016-08-31 8:24:15
Message-ID: 425ad8d804bf46feada839a8e0d0c77e () euamsexm01a ! eu ! qualcomm ! com
[Download RAW message or body]

Rajkumar Manoharan <rmanohar@qti.qualcomm.com> wrote:
> commit 7a0adc83f34d ("ath10k: improve tx scheduling") is causing
> severe throughput drop in multi client mode. This issue is originally
> reported in veriwave setup with 50 clients with TCP downlink traffic.
> While increasing number of clients, the average throughput drops
> gradually. With 50 clients, the combined peak throughput is decreased
> to 98 Mbps whereas reverting given commit restored it to 550 Mbps.
> 
> Processing txqs for every tx completion is causing overhead. Ideally for
> management frame tx completion, pending txqs processing can be avoided.
> The change partly reverts the commit "ath10k: improve tx scheduling".
> Processing pending txqs after all skbs tx completion will yeild enough
> room to burst tx frames.
> 
> Fixes: 7a0adc83f34d ("ath10k: improve tx scheduling")
> Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>

I'm planning to queue this to 4.8 if no objections.

-- 
Sent by pwcli
https://patchwork.kernel.org/patch/9303279/

[prev in list] [next in list] [prev in thread] [next in thread]