Ralink RT2860 frame aggregation

Adrian Chadd adrian at freebsd.org
Thu Oct 10 20:41:11 UTC 2013


I forget .. is the driver or the NIC itself doing aggregation?


-a


On 10 October 2013 10:33, Ramanujan Seshadri <ksramanujan at gmail.com> wrote:

> Hello all,
>   i was testing some features of ralink rt2860 driver. i saw a bit weird
> results. below is the result of what i saw. The throughput achieved doesn't
> change much when the MPDU aggregation in an AMPDU goes from 3 to 8. And
> also, the driver doesn't seem to aggregate more than 8 MPDU's in an AMPDU
> even when the BA win size is set to max of 64. i was testing this by fixing
> the rate at MCS 15
>
>  Is there anything else i need to do to force the driver to aggregate more
> MPDU's in an AMPDU ?
>
>
>
> BA Win Size           No. of MPDU's            Throughput(Mbps)
>                                 aggregated
>
> 1. 64                             7-8                            85.7
>
> 2. 32                             6-7                            84.2
>
> 3. 16                             6-7                            81.7
>
> 4.  8                              6-7                            79.9
>
> 5.  4                               5                              84.7
>
> 6.  2                               3                              71.8
>
> 7.  1                               2                              73.5
>
>
> Thanks
> ram
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