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Re: [RFC] ath9k: remove ath9k_rate_control

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Felix Fietkau wrote:
> In many tests throughput with ath9k_rate_control has been shown to be
> worse than with minstrel_ht (the mac8021 default RC).
> 
> This module also has some other problems, like starting to use the
> highest possible rate early in the connection, causing problems with
> reliability of connection/authentication attempts.
> 
> It also has a much more limited search space, ignoring many potentially
> useful rates, caused by the design decision to operate on a sorted rate
> set with the assumption that higher rates are always more unreliable
> than lower rates. In some scenarios this assumption is not true, and
> this can cause it to fall back to a really bad rate.
> 
> minstrel_ht has been tested extensively in AP and client mode by lots of
> users (mostly in the OpenWrt project, where it has been the default for
> years).

I don't think managed mode would have received much testing in OpenWRT.

> The only advantage that ath9k_rate_control previously had over minstrel_ht
> was the support for using CCK rates as fall back in case MCS rates got
> too bad, but this has now also been taken care of.
> 
> Signed-off-by: Felix Fietkau <nbd@xxxxxxxxxxx>

Acked-by: Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>

Sujith

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