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Solved GT-AX6000 cpu spikes

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splatee

Occasional Visitor
Hello everyone

I just upgraded from rt-ac86u to GT
-ax6000 running latest Merlin firmware. I am noticing that all four cores on the cpu will spike to 100 percent, not at the same time but individually. I have done a hard reset and reinstalled everything from scratch. Now I have noticed that after a fresh install the cpu cores will not spike. This seems to happen after installing Diversion. Network consists of mixture of 2.4ghz and 5ghz devices. Just wondering if this is normal behavior of the router or should I be concerned?

Thank you
 
Last edited:
Hello everyone

I just upgraded from rt-ac86u to rt-ax6000 running latest Merlin firmware. I am noticing that all four cores on the cpu will spike to 100 percent, not at the same time but individually. I have done a hard reset and reinstalled everything from scratch. Now I have noticed that after a fresh install the cpu cores will not spike. This seems to happen after installing Diversion. Network consists of mixture of 2.4ghz and 5ghz devices. Just wondering if this is normal behavior of the router or should I be concerned?

Thank you

I just uninstalled Diversion and did a reboot. Monitored for 30 minutes. Had multiple devices streaming music and online gaming and all four cou cores barley went over 10 percent.

Not sure what to do now?
 
Hello everyone

I just upgraded from rt-ac86u to rt-ax6000 running latest Merlin firmware. I am noticing that all four cores on the cpu will spike to 100 percent, not at the same time but individually. I have done a hard reset and reinstalled everything from scratch. Now I have noticed that after a fresh install the cpu cores will not spike. This seems to happen after installing Diversion. Network consists of mixture of 2.4ghz and 5ghz devices. Just wondering if this is normal behavior of the router or should I be concerned?

Thank you
What other scripts are you running? Are you using a USB or SSD and did you formatted it correctly? You also mentioned after resetting the router and setting up from scratch you're not longer seeing spikes? If everything is running smoothly than you should be good!
 
This seems to happen after installing Diversion.
Have you dug through the various discussions on Diversion in the Add-Ons subforum to see if there are any suggestions or ideas there?
https://www.snbforums.com/forums/asuswrt-merlin-addons.60/?prefix_id=10

As another person already asked, what other scripts are you running?
 
rt-ac86u to rt-ax6000 running latest Merlin firmware
Is there actually a Merlin firmware for the RT-AX6000? I bought the same router because I thought there is Merlin firmware available but then found out it is actually for the GT-AX6000. Probably this one works as well, but I didn't dare to install it. Maybe this causes the spikes?
 
OP likely means the RT-AX88U - usual confusion over specs and model number.
You can see from my siggy that I also run Diversion and even with all my scripts active I only ever see spikes like that when spdMerlin runs speedtest over VPN.
What other scripts do you run, which version of amtm and Diversion?
 
What other scripts are you running? Are you using a USB or SSD and did you formatted it correctly? You also mentioned after resetting the router and setting up from scratch you're not longer seeing spikes? If everything is running smoothly than you should be good!
There are no other scripts running. I am using 32 gig usb thumb drive, ext4. Only installed Diversion. When it is installed is when cores will randomly go to 100 percent. Uninstall diversion and spikes are gone. CPU core spikes were before and after I did hard reset of router.
 
Is there actually a Merlin firmware for the RT-AX6000? I bought the same router because I thought there is Merlin firmware available but then found out it is actually for the GT-AX6000. Probably this one works as well, but I didn't dare to install it. Maybe this causes the spikes?
Sorry I meant for the GT-AX6000
 
Since spotting the thread a couple of hours ago, I've been keeping an eye on the CPU monitor. There's some UHD Netflix streaming, some online gaming and some less demanding activities happening (currently 31 devices directly online), and no spikes to talk of!

My ThinkBroadband BQM appears busted though
11d08ef8c70f9e6f0b273f7f49454bf75c3f68ee-07-01-2025[1].png

yet everything is working and I've had no yelling about gaming!
 
Since spotting the thread a couple of hours ago, I've been keeping an eye on the CPU monitor. There's some UHD Netflix streaming, some online gaming and some less demanding activities happening (currently 31 devices directly online), and no spikes to talk of!

My ThinkBroadband BQM appears busted though
View attachment 63312
yet everything is working and I've had no yelling about gaming!
😯
 
I think I may have it sorted out now. I did the following.

Reformatted usb flash drive again
Created swap file size of 2 gigs
Installed Diversion
Blocking List is “Standard”
Turned off “logging”

Streamed movie on Paramount plus,music streaming on multiple anmazon devices and online gaming on Xbox. All four cores stayed under 10 percent and no spikes. Rebooted router 2x and still same results. Looks like it’s solved.

Thank you everyone for all the info/help :)
 
ba7434b18ef5ae2c51b67ac66be9ba8e84261f47-08-01-2025.png

It seems just the act of looking at the BQM fixed it! No settings changed!
 

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