Date: Tue, 15 Oct 2013 21:54:00 -0700 From: Adrian Chadd <adrian@freebsd.org> To: Ramanujan Seshadri <ksramanujan@gmail.com> Cc: "freebsd-wireless@freebsd.org" <freebsd-wireless@freebsd.org> Subject: Re: Ralink RT2860 frame aggregation Message-ID: <CAJ-Vmo=z4x8C4JZkLZi6Sw8nhcx6JhdSW%2Bca=McfMH1M9Fb9WA@mail.gmail.com> In-Reply-To: <CAK=C58%2Bo4XDFH5kLwwjXWF0LOTtHXVm2jtO_QcQhRkhhg4yN=A@mail.gmail.com> References: <CAK=C58JAPM2Y2htMy7hv4g9nZOP0ZT-JvKDtgRNhpcX00Ub5ug@mail.gmail.com> <CAJ-Vmom_GwDk8Em=uS87kidOBdvC-4NRZqaNrVkW-%2BZ%2BgVVBaw@mail.gmail.com> <CAK=C58%2Bo4XDFH5kLwwjXWF0LOTtHXVm2jtO_QcQhRkhhg4yN=A@mail.gmail.com>
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I don't have any real answers for you. I'd look at the interframe spacing and timing; see if it's due to big gaps in transmission/reception, see if it's something silly like AMPDU density being way too big, or maybe just lots of retries. I'm sorry I can't be more helpful than this! -adrian On 11 October 2013 11:18, Ramanujan Seshadri <ksramanujan@gmail.com> wrote: > It's in the NIC. But it seems that it sometimes aggregates more than the > set BA win size (in the driver). In fact i was wondering - if it can > actually achieve up to 80 Mbps throughput with just 8 frames aggregated. In > fact the aggregation size doesn't seem to matter much for the throughput > because any aggregation from 5-8 seems to get the same throughput. So, i > was wondering if this is something weird in NIC or can we do some thing to > control it in the driver ? > > ram > > > On Thu, Oct 10, 2013 at 4:41 PM, Adrian Chadd <adrian@freebsd.org> wrote: > >> I forget .. is the driver or the NIC itself doing aggregation? >> >> >> -a >> >> >> On 10 October 2013 10:33, Ramanujan Seshadri <ksramanujan@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 >>> _______________________________________________ >>> freebsd-wireless@freebsd.org mailing list >>> http://lists.freebsd.org/mailman/listinfo/freebsd-wireless >>> To unsubscribe, send any mail to " >>> freebsd-wireless-unsubscribe@freebsd.org" >>> >> >> >
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