I am testing the driver code witht he ralink nic. Yes the frame aggregation works, since i get higher throughput. I am actually tryign to know how many frames (MPDU's) are aggregated each time in an AMPDU.
Regarding the MPDU density - i was wondering how it should affect the Frame aggregation. Since MPDU density is the time duration between each MPDU sent within the AMPDU. So, how does this matter to the hardware for aggregating the number of frames. It just sends MPDU's with the set interval. The other two limits make sense, the BAWinSize and the MAX_LEN_CFG. Ram On Wed, Jan 30, 2013 at 5:45 PM, PseudoCylon <moonlightak...@yahoo.ca>wrote: > On Wed, Jan 30, 2013 at 1:20 PM, Ramanujan Seshadri > <ksramanu...@gmail.com> wrote: > > Thank you. I also wanted to know the function where the Block ACK Window > > will be decided. is it decided during the ADDBA session establishment or > > does it change dynamically. > > The hardware will aggregate packets until any of following limits hit max > http://fxr.watson.org/fxr/source/dev/ral/rt2860reg.h#L782 > * rt2860_txwi.flags > RT2860_TX_MPDU_DSITY_SHIFT > 000 == no restriction > 001 == 1/4 us > 010 == 1/2 us > ... > 111 == 16 us > * rt2860_txwi.xflags > RT2860_TX_BAWINSIZE_SHIFT (frame count) > > http://fxr.watson.org/fxr/source/dev/ral/rt2860reg.h#L93 > * RT2860_MAX_LEN_CFG bit 12:13 > 00 == 8k bytes > 01 == 16k > 10 == 32k > 11 == 64k > > At a quick look, none of them is set in current code. Also, > RT2860_TX_AMPDU flag need to be set to make the h/w aggregate packets. > > How is ampdu working on ral(4)? I cannot test because I do not have > any ral(4) nic (only have run(4) nics). > > > AK > > > > > > > On Thu, Jan 24, 2013 at 5:13 PM, PseudoCylon <moonlightak...@yahoo.ca> > > wrote: > >> > >> > Message: 6 > >> > Date: Thu, 24 Jan 2013 12:23:55 -0500 > >> > From: Ramanujan Seshadri <ksramanu...@gmail.com> > >> > To: freebsd-net@freebsd.org > >> > Subject: Block ACK in Ralink RT2860 > >> > Message-ID: > >> > > >> > <CAK=c58kya80kgvqenhj8xekmkkdnhnmbqkzoykq-k6r_7v4...@mail.gmail.com> > >> > Content-Type: text/plain; charset=ISO-8859-1 > >> > > >> > Hi all, > >> > I am trying to read the contents of block ack's in a Ralink RT2860 > >> > driver. > >> > Can you please help me to know which function i should be looking > into ? > >> > >> At default, all BA packets are dropped by h/w. Clear RT2860_DROP_BA flag > >> at > >> http://fxr.watson.org/fxr/source/dev/ral/rt2860.c#L3559 > >> > >> Then, the diver should receive BA packets, and you can read them. > >> > >> > >> AK > > > > > _______________________________________________ freebsd-net@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-net To unsubscribe, send any mail to "freebsd-net-unsubscr...@freebsd.org"
