Performance of AR9287

[Adrian Chadd]

I assume you've tweaked the ack, slot, rtsctstimeout?

The 11n rate control code is a little more jumpy. I've fixed that in
recent checkins. It's not optimal but now it's not as jumpy as before.

Update to -HEAD, then use 'athratestats' on the peer MAC address. It's
quite useful to see what's actually going on. :-)



Adrian

On 22 September 2012 01:20, Johann Hugo <jhugo at meraka.csir.co.za> wrote:
> On Saturday 22 September 2012 02:05:23 Derrick Edwards wrote:
>
>>      Thanks again for looking into this.
>
>> My main concern was the range of network performance that I was getting
>
>> when  the laptop was right in front of the access point. As you can see
>
>> bandwith varied greatly.
>
>
>
> I don't know if it's related, but my RSSI and RATE jumps around quite a lot
> while transfering a large file.
>
>
>
> Output from loop doing "ifconfig wlan0 list sta" while transfering a big
> file.
>
>
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 86M 16.5 0 842 9440 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 43M 12.5 0 1063 14784 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 43M 15.5 0 1362 21088 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 86M 15.5 0 1627 27488 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 86M 13.5 0 2150 38976 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 86M 11.5 0 2289 42384 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 29M 24.5 0 3075 60016 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 86M 28.5 0 3369 1600 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 86M 14.0 0 3839 11744 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 29M 13.5 0 87 19936 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 58M 11.5 0 403 27440 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 58M 12.5 0 758 35200 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 58M 11.0 0 1054 42320 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 58M 23.5 0 1249 46512 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 29M 11.0 0 1381 49312 E AQHTR HTCAP WME
>
> ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG
>
> 00:0c:42:6c:58:29 1 128 58M 11.5 0 1584 54224 E AQHTR HTCAP WME
>
>
>
> System info = hybrid
>
> HW = gateworks ARM
>
> OS = FreeBSD-9 with ath code from current
>
> Wifi = RouterBOARD R52nM = AR9220
>
> Distance = 8km
>
>
>
> B.t.w if I use the same HW with FreeBSD-9 in 11a mode, then RSSI does not
> jump around and I get about the same throuput as with N.
>
>
>
> I don't have any athstats output, still working on it.
>
>
>
> Johann