Speed issues and high latency: please report here!

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Giraffe
DD-WRT User


Joined: 07 Sep 2014
Posts: 80

PostPosted: Sun Apr 10, 2016 14:14    Post subject: Speed issues and high latency: please report here! Reply with quote
I'm currently seeing two major issues running DD-WRT on my WRT1900ACv2, with the latest (10.3.0.17) driver and firmware (ver. 7.2.9.2)

1. Low Wireless troughput:
Wireless troughput is 'stuck' or capped at <25mbps

2. High latency over WiFi:
Latency is really abnormally high 25ms to 30ms or more

Now I’ve read that some of you are affected by latency and throughput issues as well and i would like to know how many of us are affected.

If you own a WRT1200AC, a WRT1900AC, a WRT1900ACv2 or a WRT1900ACS and are seeing the aforementioned issues, please report them below.

Please incorporate the following in you report:

- Router model (e.g. WRT1200AC / WRT1900AC / WRT1900ACv2 / WRT1900ACS);

- DD-WRT build number;

- mwlwifi driver version;

- the Operating System and / or kernel version of the Wifi client you use(d) (for testing);

- a description of the problem (high latency - in ms - and / or - throughput is
capped at 25mbps or below).

The mwlwifi driver version can be found by running the following command on you're router:
strings /lib/ath9k/mwlwifi.ko | grep -i 10.

Latency can be tested by pinging a server or using speedtest.net
Please note that latency over wired LAN is normal; the issue seems limited to WLAN.
If there's a big difference between latency over LAN and latency over WLAN you're probably affected.

Thank you for you're cooperation!
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stephensuley
DD-WRT Guru


Joined: 09 Feb 2008
Posts: 619
Location: Canada

PostPosted: Mon Apr 11, 2016 2:00    Post subject: Reply with quote
I have issue #1. The wifi performance is capped at 25-30mbps.

my latency seems normal.

Router: wrt1900AC

BUILD: 29409

Driver version :10.3.0.17-20160324

wl0 - Radio Settings: AP mode with ng-mixed wpa2-aes, ch#1 20/40 upper.

wl1 - Radio Disabled

Client(s) I've tested wifi speed with include, Mac and Windows hosts. I've also tested with iperf between two routers. No matter what when connected to the wrt1900ac I never get higher than 30mbps,and 20mps-25mbps is the normal.

_________________
Location 1-rural) -WRT1900AC v1 (AP)- (NG)2.4Ghz/40Mhz) --250ft l.o.s.-->RT-AC87u (N-Only/client bridge) <back2back> RT-AC68u (wl0 & wl1 in AP mode / WAN disabled) - 150MBit/s end to end

Location 2-urban) - 1x Linksys EA8500 (AP)

Location 3-rural) - 1x Asus RT-AC87u (AP)

Latest and greatest builds Wink
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