linux-kernel - Re: [PATCH] ath10k: disable cpuidle during downloading firmware.

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Message-ID: <877e4aydhj.fsf@kamboji.qca.qualcomm.com>
Date:   Fri, 08 Nov 2019 10:32:56 +0200
From:   Kalle Valo <kvalo@...eaurora.org>
To:     Ikjoon Jang <ikjn@...omium.org>
Cc:     netdev@...r.kernel.org, linux-wireless@...r.kernel.org,
        linux-kernel@...r.kernel.org, ath10k@...ts.infradead.org,
        "David S . Miller" <davem@...emloft.net>
Subject: Re: [PATCH] ath10k: disable cpuidle during downloading firmware.

Ikjoon Jang <ikjn@...omium.org> writes:

> On Thu, Nov 7, 2019 at 2:23 AM Kalle Valo <kvalo@...eaurora.org> wrote:
>>
>> Ikjoon Jang <ikjn@...omium.org> writes:
>>
>> > Downloading ath10k firmware needs a large number of IOs and
>> > cpuidle's miss predictions make it worse. In the worst case,
>> > resume time can be three times longer than the average on sdio.
>> >
>> > This patch disables cpuidle during firmware downloading by
>> > applying PM_QOS_CPU_DMA_LATENCY in ath10k_download_fw().
>> >
>> > Signed-off-by: Ikjoon Jang <ikjn@...omium.org>
>>
>> On what hardware and firmware versions did you test this? I'll add that
>> to the commit log.
>>
>> https://wireless.wiki.kernel.org/en/users/drivers/ath10k/submittingpatches#guidelines
>
> Thank you for sharing it.
> It's QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00029
> on ARMv8 multi cluster platform.

Thanks, I added that to the commit log.

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