Re: Anyone doing WiFi throughput tests?

[Sujith Manoharan <c_manoha@xxxxxxxxxxxxxxxx>]

Adrian Chadd wrote:
> On 25 May 2012 20:17, Ben Greear <greearb@xxxxxxxxxxxxxxx> wrote:
> > We've been doing some tests using Atheros stations and various APs.  The max
> > throughput
> > we've seen so far is about 237Mbps (received UDP payload on the stations).
> > (Open-Air, AP about 5 feet away, 3x3 MIMO, HT40, 5Ghz, etc).
> >
> > We are still running lots of different permutations, but I am interested if
> > anyone else has any numbers to share (official or otherwise).
> 
> FWIW, FreeBSD was getting 270MBit/sec one-way UDP and 150MBit one-way
> TCP out of AR9160/AR9280's late last year. I should re-run those tests
> again now that I've fixed a bunch of things and see if I've regressed.
> Those are 2T2R devices w/ a Routerstation Pro (AR7161) as the hostap.

270 Mbps with a 2-stream device ? That seems abnormally high. :)

> At that stage I was maxing out the AR7161 CPU quite badly and filling
> up all kinds of TX/RX paths, to the point that beacon transmission
> stopped being reliable. But I haven't really sat down and run
> performance measurements on MIPS so it's quite possible there's some
> inefficiencies in FreeBSD that I can work around (to reduce the CPU
> overhead, I was happy with the throughput.. :)
> 
> Sujith, would you mind testing out ath9k/openwrt on a DB120 and see if
> you can get the same results as our internal LSDK builds?

Odd. I get low numbers with a DB120 running OpenWRT (git HEAD).

TCP TX - ~260 Mbps.
TCP RX - ~160 Mbps.

UDP RX - ~240 Mbps.
UDP TX - iperf borks and doesn't display anything.

The load seems to be a bit high (average: 1.92, 1.06, 0.61 ) and the
console becomes laggy.

Maybe 
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