Re: Wireless network slows down with zyd0

2017-10-09 Thread Adrian Chadd 
Hi,

It looks like the NIC is retrying enough that rate control just keeps
dropping the rate. Or, the NIC isn't retrying but the rate control is
being told lies. :-)

We'll have to look at the driver to see what's going on!

Please bug us in #freebsd-wifi in efnet. :)

-adrian


On 9 October 2017 at 02:29, Rouan Lucas van Ryn  wrote:
> I have been experiencing slow network speeds with my FreeBSD (11.0)
> system on my wireless LAN.
>
> My wireless card is a USB ZyDAS card:
> zyd0:  on usbus3
>
> When I start networking, wireless speeds seem OK (~700KB/s when scp'ing
> a file to my laptop on the WLAN), but after around 10 seconds of network
> activity drop off to become very slow (~70KB/s). Speeds stay slow until
> networking is restarted and then pick up again momentarily. Tests with
> iperf yield similar results.
>
> I have found that the wireless connection is being renegotiated at lower
> and lower speeds:
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 72, txcnt=11, retrycnt=17
> wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 48 (txcnt=11 retrycnt=17)
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 48, txcnt=11, retrycnt=14
> wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 36 (txcnt=11 retrycnt=14)
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 36, txcnt=11, retrycnt=13
> wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 24 (txcnt=11 retrycnt=13)
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 24, txcnt=11, retrycnt=11
> wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 22 (txcnt=11 retrycnt=11)
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 22, txcnt=11, retrycnt=13
> wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 18 (txcnt=11 retrycnt=13)
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 18, txcnt=11, retrycnt=11
> wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 12 (txcnt=11 retrycnt=11)
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 12, txcnt=11, retrycnt=12
> wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 11 (txcnt=11 retrycnt=12)
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 11, txcnt=11, retrycnt=11
> wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 4 (txcnt=11 retrycnt=11)
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 4, txcnt=11, retrycnt=11
> wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 2 (txcnt=11 retrycnt=11)
> wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 2, txcnt=11, retrycnt=11
>
> The same wireless card works well (no slowdown) when connected to a
> different computer (not FreeBSD) in the same room, leading me to suspect
> that this isn't a hardware or signal strength issue.
>
> Netstat shows that packets are being retransmitted:
> tcp:
> 109179 packets sent
> 108551 data packets (110570192 bytes)
> 575 data packets (534156 bytes) retransmitted
> 6 data packets unnecessarily retransmitted
> ...
>
> Relevant parts of ifconfig:
> zyd0: flags=8843 metric 0 mtu 2290
> ether 00:25:xx:xx:xx:xx
> nd6 options=29
> media: IEEE 802.11 Wireless Ethernet autoselect mode 11g
> status: associated
> wlan0: flags=8843 metric 0 mtu 1500
> ether 00:25:xx:xx:xx:xx
> inet 192.168.1.6 netmask 0xff00 broadcast 192.168.1.255
> nd6 options=29
> media: IEEE 802.11 Wireless Ethernet DS/1Mbps mode 11g
> status: associated
> ssid SPARK- channel 1 (2412 MHz 11g) bssid 0c:d6:bd:1a:19:24
> regdomain APAC country NZ authmode WPA2/802.11i privacy ON
> deftxkey UNDEF TKIP 2:128-bit txpower 30 bmiss 7 scanvalid 60 bgscan
> bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 5 protmode CTS
> roaming MANUAL
>
> Note in particular the line:
> media: IEEE 802.11 Wireless Ethernet DS/1Mbps mode 11g
>
> ifconfig wlan0 scan gives me:
> SSID/MESH IDBSSID  CHAN RATE   S:N INT CAPS
> SPARK-0c:d6:bd:1a:19:241   54M -58:-95  100 EP   RSN HTCAP WPS WPA
> (among other networks)
>
> --
> Thanks,
> Rouan
> ___
> freebsd-wireless@freebsd.org mailing list
> https://lists.freebsd.org/mailman/listinfo/freebsd-wireless
> To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"
___
freebsd-wireless@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/freebsd-wireless
To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"

Wireless network slows down with zyd0

2017-10-09 Thread Rouan Lucas van Ryn 
I have been experiencing slow network speeds with my FreeBSD (11.0)
system on my wireless LAN.

My wireless card is a USB ZyDAS card:
zyd0:  on usbus3

When I start networking, wireless speeds seem OK (~700KB/s when scp'ing
a file to my laptop on the WLAN), but after around 10 seconds of network
activity drop off to become very slow (~70KB/s). Speeds stay slow until
networking is restarted and then pick up again momentarily. Tests with
iperf yield similar results.

I have found that the wireless connection is being renegotiated at lower
and lower speeds:
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 72, txcnt=11, retrycnt=17
wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 48 (txcnt=11 retrycnt=17)
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 48, txcnt=11, retrycnt=14
wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 36 (txcnt=11 retrycnt=14)
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 36, txcnt=11, retrycnt=13
wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 24 (txcnt=11 retrycnt=13)
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 24, txcnt=11, retrycnt=11
wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 22 (txcnt=11 retrycnt=11)
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 22, txcnt=11, retrycnt=13
wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 18 (txcnt=11 retrycnt=13)
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 18, txcnt=11, retrycnt=11
wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 12 (txcnt=11 retrycnt=11)
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 12, txcnt=11, retrycnt=12
wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 11 (txcnt=11 retrycnt=12)
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 11, txcnt=11, retrycnt=11
wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 4 (txcnt=11 retrycnt=11)
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 4, txcnt=11, retrycnt=11
wlan0: [0c:d6:bd:1a:19:24] AMRR decreasing rate 2 (txcnt=11 retrycnt=11)
wlan0: [0c:d6:bd:1a:19:24] AMRR: current rate 2, txcnt=11, retrycnt=11

The same wireless card works well (no slowdown) when connected to a
different computer (not FreeBSD) in the same room, leading me to suspect
that this isn't a hardware or signal strength issue.

Netstat shows that packets are being retransmitted:
tcp:
109179 packets sent
108551 data packets (110570192 bytes)
575 data packets (534156 bytes) retransmitted
6 data packets unnecessarily retransmitted
...

Relevant parts of ifconfig:
zyd0: flags=8843 metric 0 mtu 2290
ether 00:25:xx:xx:xx:xx
nd6 options=29
media: IEEE 802.11 Wireless Ethernet autoselect mode 11g
status: associated
wlan0: flags=8843 metric 0 mtu 1500
ether 00:25:xx:xx:xx:xx
inet 192.168.1.6 netmask 0xff00 broadcast 192.168.1.255 
nd6 options=29
media: IEEE 802.11 Wireless Ethernet DS/1Mbps mode 11g
status: associated
ssid SPARK- channel 1 (2412 MHz 11g) bssid 0c:d6:bd:1a:19:24
regdomain APAC country NZ authmode WPA2/802.11i privacy ON
deftxkey UNDEF TKIP 2:128-bit txpower 30 bmiss 7 scanvalid 60 bgscan
bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 5 protmode CTS
roaming MANUAL

Note in particular the line:
media: IEEE 802.11 Wireless Ethernet DS/1Mbps mode 11g

ifconfig wlan0 scan gives me:
SSID/MESH IDBSSID  CHAN RATE   S:N INT CAPS
SPARK-0c:d6:bd:1a:19:241   54M -58:-95  100 EP   RSN HTCAP WPS WPA
(among other networks)

-- 
Thanks,
Rouan 
___
freebsd-wireless@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/freebsd-wireless
To unsubscribe, send any mail to "freebsd-wireless-unsubscr...@freebsd.org"