Inconsistent/Slow Wi-Fi Speeds on EA8500

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Rocketboy235
DD-WRT User


Joined: 14 Oct 2016
Posts: 109
Location: United States

PostPosted: Sun Mar 28, 2021 20:25    Post subject: Reply with quote
Hello,

Sorry for the delay. Here are the results from my iPerf3 test.

https://imgur.com/a/PkMKbBs (or click on the image below to be able to zoom in)

----------

EA8500 WiFi performance after online for 7 days - Running DD-WRT - BS build r44719

In my test, I have 2 devices/PCs with WiFi adapters that ran iPerf3 and connected to an iPerf3 server locally on my home server (connected via ethernet to main router).

Top image in each column was done with iPerf arguments: -b 1000M -P 4
Middle image was with Ookla Internet speed test
Bottom image was UDP test done with iPerf arguments: -t 10 -u -l 32k -w 128k -i 1

Normal ISP bandwidth is 120 Mbit/s download and 6 Mbit/s upload.

_________________
DD-WRT Router Arsenal:

Linksys EA8500 - BS 47256 (previously r46446)
TP Link TL-WR1043ND v1.8 - BS 42819 (previously r45955)
Motorola WR850G v3 - BS 21286
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Rocketboy235
DD-WRT User


Joined: 14 Oct 2016
Posts: 109
Location: United States

PostPosted: Sun Apr 04, 2021 23:04    Post subject: Reply with quote
Bump.

Not sure if my problem is still an isolated issue that only very few people have. I guess all I can do now is download the latest from BS beta builds and hope for the best or try out OpenWRT and see if I still have issues. I guess if I still have issues when moving to OpenWRT, then chances are, it could be the hardware.

_________________
DD-WRT Router Arsenal:

Linksys EA8500 - BS 47256 (previously r46446)
TP Link TL-WR1043ND v1.8 - BS 42819 (previously r45955)
Motorola WR850G v3 - BS 21286
Per Yngve Berg
DD-WRT Guru


Joined: 13 Aug 2013
Posts: 6858
Location: Romerike, Norway

PostPosted: Mon Apr 05, 2021 8:22    Post subject: Reply with quote
Have you looked at Status->Wireless.

Here you can see the speed and error rate for each client.

What channel are you using?

Have you disabled "Multi User Beamforming". That make it go down to a crawl when you turn on a client with a Broadcom chip.
Rocketboy235
DD-WRT User


Joined: 14 Oct 2016
Posts: 109
Location: United States

PostPosted: Sat Apr 10, 2021 5:45    Post subject: Reply with quote
Per Yngve Berg wrote:
Have you looked at Status->Wireless.

Here you can see the speed and error rate for each client.

What channel are you using?

Have you disabled "Multi User Beamforming". That make it go down to a crawl when you turn on a client with a Broadcom chip.


Hello,

Yes, looked at the speed and error rate and don't see anything unusual. See maybe a few errors out of million of packets sent/received okay for both 2.4 and 5 ghz bandwidths.

For 2.4 GHz, I use channel 1

For 5 GHz, I use channel 161

I have disabled Multi user beamforming as suggested in MSOEngineer's QCA Wifi settings.
https://forum.dd-wrt.com/phpBB2/viewtopic.php?p=1198757#1198757

Thanks.

_________________
DD-WRT Router Arsenal:

Linksys EA8500 - BS 47256 (previously r46446)
TP Link TL-WR1043ND v1.8 - BS 42819 (previously r45955)
Motorola WR850G v3 - BS 21286
Rocketboy235
DD-WRT User


Joined: 14 Oct 2016
Posts: 109
Location: United States

PostPosted: Thu May 20, 2021 0:27    Post subject: Reply with quote
Looks like issue I have experienced has mostly disappeared after I making a few WiFi setting changes after upgrading to r46446 several weeks ago.

Looks like what did the trick was changing the firmware type to DD-WRT instead of Vanilla within the WiFi settings has mostly resolved my slow WiFi speed issue! So far it's been a week and I haven't really noticed any slowdowns. Still need to continue testing a few more weeks and then switch back and forth between the firmware types to really make sure. But so far so good! Cool

_________________
DD-WRT Router Arsenal:

Linksys EA8500 - BS 47256 (previously r46446)
TP Link TL-WR1043ND v1.8 - BS 42819 (previously r45955)
Motorola WR850G v3 - BS 21286
ho1Aetoo
DD-WRT Guru


Joined: 19 Feb 2019
Posts: 2927
Location: Germany

PostPosted: Fri May 21, 2021 6:15    Post subject: Reply with quote
Rocketboy235 wrote:
Hello,

Sorry for the delay. Here are the results from my iPerf3 test.

https://imgur.com/a/PkMKbBs (or click on the image below to be able to zoom in)

----------

EA8500 WiFi performance after online for 7 days - Running DD-WRT - BS build r44719

In my test, I have 2 devices/PCs with WiFi adapters that ran iPerf3 and connected to an iPerf3 server locally on my home server (connected via ethernet to main router).

Top image in each column was done with iPerf arguments: -b 1000M -P 4
Middle image was with Ookla Internet speed test
Bottom image was UDP test done with iPerf arguments: -t 10 -u -l 32k -w 128k -i 1

Normal ISP bandwidth is 120 Mbit/s download and 6 Mbit/s upload.


Your Iperf3 measurements do not match your slow internet speed.
Iperf measures a data rate of 50-70Mbit (with multiple streams).
You should also test with a single stream.

Code:
iperf3 -c 192.168.1.1 -P 1 -t 60
iperf3 -c 192.168.1.1 -P 4 -t 60

iperf3 -Rc 192.168.1.1 -P 1 -t 60
iperf3 -Rc 192.168.1.1 -P 4 -t 60


So both directions (send and receive, with one and multiple streams)

You don't really need to test UDP, it's hardly ever used because UDP packets are simply transmitted without confirmation of receipt, they just arrive or not (packet loss).
TCP is used for all important data anyway.

All the other Iperf3 parameters are not needed.

Quote:
What I did was I used the DD-WRT for the firmware type instead of Vanilla and it seems to be a lot more consistent in speed for both 2.4 GHz and 5 GHz.


If the dd-wrt firmware works better for you.
We have had some controversial experiences - for me the vanilla firmware works better, I have reproducible speed drops in the 5Ghz WLAN with the dd-wrt firmware.

For others, the 2.4 GHz WLAN does not work properly (clients cannot connect with NG-Mixed).
etc
Rocketboy235
DD-WRT User


Joined: 14 Oct 2016
Posts: 109
Location: United States

PostPosted: Sat May 22, 2021 19:03    Post subject: Reply with quote
I had some cases where when I did a network file transfer, it was faster than the speed test so I'm not too surprised if the iperf and the speed test do not line up sometimes. I will concede though that my iPerf testing is definitely flawed so I will keep in mind of your suggestions when I do future testing, thanks.

And yeah, I'm aware of the issues with not using vanilla firmware. Somehow it seems that DD-WRT firmware type works better but it's only been 11 days since I've been using it. I will have better insight as a few months pass. I plan to switch back and forth between vanilla and DD-WRT firmware types to get a good idea.

No issues with using NG-mixed on DD-WRT firmware type yet.

_________________
DD-WRT Router Arsenal:

Linksys EA8500 - BS 47256 (previously r46446)
TP Link TL-WR1043ND v1.8 - BS 42819 (previously r45955)
Motorola WR850G v3 - BS 21286
Rocketboy235
DD-WRT User


Joined: 14 Oct 2016
Posts: 109
Location: United States

PostPosted: Tue Aug 31, 2021 19:57    Post subject: Reply with quote
Just replying to this thread since it seems like the issue has been finally 100% resolved in all firmware types. Previous build I was on was back in late April and I experienced this issue when using the Vanilla firmware. On the DD-WRT firmware type for the WLAN, I had no issue.

After updating to the late august build, it looks like Vanilla firmware type is all good (performs just as well as I was using the DD-WRT firmware type at least)! Very Happy

Not sure what Atheros driver updates were done in between from late April to late August but something must have been fixed as that issue no longer happens.
https://svn.dd-wrt.com/log/src?action=stop_on_copy&mode=stop_on_copy&rev=47256&stop_rev=46446&limit=999&sfp_email=&sfph_mail=#

Now I don't have to use the older DD-WRT wireless firmware type anymore. Hooray!

Only been using this new firmware for a few days though but if I don't reply anymore to this thread about this, then you can safely assume all is good.

_________________
DD-WRT Router Arsenal:

Linksys EA8500 - BS 47256 (previously r46446)
TP Link TL-WR1043ND v1.8 - BS 42819 (previously r45955)
Motorola WR850G v3 - BS 21286
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