netdev - Re: [RFC PATCH v5] rtl8xxxu: Improve TX performance of RTL8723BU on rtl8xxxu driver

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Date:   Mon, 1 Jul 2019 15:57:25 +0800
From:   Daniel Drake <drake@...lessm.com>
To:     Chris Chiu <chiu@...lessm.com>
Cc:     Jes Sorensen <jes.sorensen@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        David Miller <davem@...emloft.net>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        netdev <netdev@...r.kernel.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Linux Upstreaming Team <linux@...lessm.com>
Subject: Re: [RFC PATCH v5] rtl8xxxu: Improve TX performance of RTL8723BU on
 rtl8xxxu driver

On Mon, Jun 17, 2019 at 2:56 PM Chris Chiu <chiu@...lessm.com> wrote:
> With this commit, the tx rate of each data and qos data packet will
> be 39Mbps (MCS4) with the 0xF00000 as the tx rate mask. The 20th bit
> to 23th bit means MCS4 to MCS7. It means that the firmware still picks
> the lowest rate from the rate mask and explains why the tx rate of
> data and qos data is always lowest 1Mbps because the default rate mask
> passed is always 0xFFFFFFF ranges from the basic CCK rate, OFDM rate,
> and MCS rate. However, with Realtek's driver, the tx rate observed from
> wireshark under the same condition is almost 65Mbps or 72Mbps
suggestion: add:
, indicating that rtl8xxxu could still be further improved.

Then remove this paragraph, I think we're in agreement of the approach here:
> I believe the firmware of RTL8723BU may need fix. And I think we
> can still bring in the dm_watchdog as rtlwifi to improve from the
> driver side. Please leave precious comments for my commits and
> suggest what I can do better. Or suggest if there's any better idea
> to fix this. Thanks.

> Signed-off-by: Chris Chiu <chiu@...lessm.com>
Reviewed-by: Daniel Drake <drake@...lessm.com>

> +        * is supported and no iface_combinations are providec.

typo: provided