Ralink RT2860 frame aggregation

[Ramanujan Seshadri]

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