Hi,
>
> Hi Emmanuel,
>
> >
> > The default number of retries is 16. The reason you have odd numbers
> > is because we don't report this properly. The big problem is about
> > AMPDU mainly - the frames are picked up by the HW and retransmissions
> > are handled by the FW / HW. While we know how many packets failed vs.
> > how many were sent (for rate control purposes), we can't know exactly
> > what frame we retransmitted and how many times (well... we can - but
> > it is not trivial). Since the the only way to tell mac80211 / cfg80211
> > / iw is per-packet (in ieee80211_tx_status in each Tx status for each
> > packet), the information there is not accurate.
> >
> > I want to hope that if you disabled AMPDU (Tx) you'll get more
> > accurate results - I haven't tested myself though.
>
> Does this mean that if AMPDU is disabled, the retransmissions will be either
> handled in software, or the hardware will report retransmissions more
> accurately?
Yeah - something like that. But again, I don't really think that these numbers are really trustworthy. Might be worth checking.
>
> How should I disable AMPDU?
Module parameter: 11n_disable=1
Or take 3.14-rc8 / 3.13.7 - it is disabled by default in these kernels.
>
> Daniel
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