As far as i know AMPDU length is determined by 3 constraints. Firs maximum AMPDU length. second blockAck window (if there were losses then this will play a role). Third is Max air time of the AMPDU which is 4ms for some domain constraints. this comes into play MCS is low and packet duration gets more than 4ms. See following function in xmit.c for details
ath_tx_form_aggr <http://lxr.free-electrons.com/ident?i=ath_tx_form_aggr> On Tue, Jan 21, 2014 at 11:49 PM, Ali Abedi <a2ab...@uwaterloo.ca> wrote: > Hello, > > I have seen questions regarding the length of an AMPDU and how to change > the maximum AMPDU length. > However, I require to lock the AMPDU length at a specific value. > Changing the max length does not guarantee > that all AMPDUs have a fixed length, it can be anything between 1 to max > based on the rate of arrival of new frames. > Is there a mechanism to force the card to wait to have enough frames so > that all AMPDUs have a fixed length that we specify? In other words, I > need all AMPDUs to aggregate X full length frames. > > Thank you, > Ali > > _______________________________________________ > ath9k-devel mailing list > ath9k-devel@lists.ath9k.org > https://lists.ath9k.org/mailman/listinfo/ath9k-devel >
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