ath0 performence issues "ar9300_Stub_GetCTSTimeout" "ar9300_Stub_GetCTSTimeout

Thu Mar 19 20:56:57 UTC 2015

On Sun, Feb 15, 2015 at 8:32 PM, Miguel Clara <miguelmclara at gmail.com>
wrote:

>
>
> On Sun, Feb 15, 2015 at 8:25 PM, Adrian Chadd <adrian at freebsd.org> wrote:
>
>> I bet your environment is quite noisy and the ar9300 HAL is just not
>> coping well. :(
>>
>>
>> Could be, I have a laptop and a cell phone just close by and the TV is
> also using wireless, but those are on 2.4Ghtz... and ... Oooh
> I just noticed its connected to "PissnLove" and not "PissnLove5G".
>
> wpa_supplicant sometimes fails on selecting the on with higher priority.
>
> I'll force it back to the 5G and see if this goes away and if so I guess
> you are correct :)
>

Been busy for the last weeks, I wanted to update/sync my src before posting
more feedback on this.

# uname -a
FreeBSD r2d2 11.0-CURRENT FreeBSD 11.0-CURRENT #5 r280238+2c4b57d(master):
Thu Mar 19 03:09:58 WET 2015     root at r2d2:/usr/obj/usr/src/sys/GENERIC-NODEBUG
 amd64

Note: the following test were done with only 2 wireless devices connect to
the router and while doing the tests on the laptop in turned wifi off in
the smartphone.
Also the smartphone was even a little bit more distant from the router than
the laptop (not much)

The issue is clear not with the 5G/2.4G as I get about the same performance
with boot see iperf results:

#############################
iperf3 -c _server_
Connecting to host yoda, port 5201
[  4] local 1.1.1.1 port 48073 connected to 1.1.1.2 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec  1.67 MBytes  14.0 Mbits/sec
[  4]   1.00-2.00   sec  1.67 MBytes  14.0 Mbits/sec
[  4]   2.00-3.00   sec  1.35 MBytes  11.4 Mbits/sec
[  4]   3.00-4.00   sec  1.56 MBytes  13.1 Mbits/sec
[  4]   4.00-5.00   sec  1.35 MBytes  11.4 Mbits/sec
[  4]   5.00-6.00   sec  1.73 MBytes  14.5 Mbits/sec
[  4]   6.00-7.00   sec  1.93 MBytes  16.2 Mbits/sec
[  4]   7.00-8.00   sec  1.65 MBytes  13.8 Mbits/sec
[  4]   8.00-9.00   sec  1.15 MBytes  9.65 Mbits/sec
[  4]   9.00-10.00  sec  1.38 MBytes  11.6 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-10.00  sec  15.4 MBytes  13.0 Mbits/sec                  sender
[  4]   0.00-10.00  sec  15.4 MBytes  12.9 Mbits/sec
 receiver
###########################

That's to a local Wired (1Gbit) connected iperf3 server.

In comparison I get 100+ Mpbs on my One Plus One device in an internet
speedtest, proof here: http://www.speedtest.net/my-result/a/1207329176

And an iperf3 test on the same smartphone to the server:
#############################
Connecting to host local_server, port 5201
[ 4] local 1.1.1.1 port 52337 connected to 1.1.1.2 port 5201
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-1.01 sec 11.8 MBytes 98.4 Mbits/sec
[ 4] 1.01-2.00 sec 13.4 MBytes 113 Mbits/sec
[ 4] 2.00-3.00 sec 13.6 MBytes 114 Mbits/sec
[ 4] 3.00-4.00 sec 13.3 MBytes 112 Mbits/sec
[ 4] 4.00-5.00 sec 14.1 MBytes 117 Mbits/sec
[ 4] 5.00-6.00 sec 13.6 MBytes 115 Mbits/sec
[ 4] 6.00-7.00 sec 13.7 MBytes 115 Mbits/sec
[ 4] 7.00-8.00 sec 13.4 MBytes 113 Mbits/sec
[ 4] 8.00-9.00 sec 13.7 MBytes 115 Mbits/sec
[ 4] 9.00-10.00 sec 13.2 MBytes 111 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bandwidth
[ 4] 0.00-10.00 sec 134 MBytes 112 Mbits/sec sender
[ 4] 0.00-10.00 sec 134 MBytes 112 Mbits/sec receiver
################################

So it seems that the performance is indeed very low and only on the ath,
and not due to to much clients in either 5g or 2.4g

If important:
ath0 at pci0:2:0:0:        class=0x028000 card=0xe052105b chip=0x0034168c
rev=0x01 hdr=0x00
    vendor     = 'Atheros Communications Inc.'
    device     = 'AR9462 Wireless Network Adapter'
    class      = netw

# cat /var/run/dmesg.boot  | grep ath

ath0: <Atheros AR946x/AR948x> mem 0xc0400000-0xc047ffff irq 19 at device
0.0 on pci2
ath0: [HT] enabling HT modes
ath0: [HT] enabling short-GI in 20MHz mode
ath0: [HT] 1 stream STBC receive enabled
ath0: [HT] 1 stream STBC transmit enabled
ath0: [HT] 2 RX streams; 2 TX streams
ath0: AR9460 mac 640.2 RF5110 phy 0.0
ath0: 2GHz radio: 0x0000; 5GHz radio: 0x0000

Any more info I should add to help track this?

thanks