RT-AC5300 High CPU usage Both cores

[kingracefan]

My router is experiencing very high cpu usage on both cores. On recent firmware
3.0.0.0.4.384_81625.

Suggestions to resolve are appreciated.
https://rog.asus.com/forum/attachment.php?attachmentid=84460&d=1585854982&thumb=1&stc=1ery high cpu usage on both cores

[kingracefan]

True SSH I ran Top command and mtdblock3 shows high usage on both cores.

[bj_superstar]

I have exactly the same symptoms. If I do a firmware reload (factory reset) it returns to normal operation for maybe 18-48 hours, but then goes back to what the screenshot shows. I haven't been able to identify a device or application on the network that might be triggering it.

-BJ

[zanoradiel]

Same here, been having this issue for weeks now. reboot, restart, back to factory settings, nothing works. Hope Asus come with solution.
Currently on the latest firmware : 3.0.0.4.384_81625-gbf41021

[RedSector73]

Could try AsusWRT Merlin firmware ? https://www.asuswrt-merlin.net/download been using it years now on my RT-AC87U

[zanoradiel]

Thank you! After installed Merlin everything went back to normal for both CPU cores. Appreciate for the suggestion

[bj_superstar]

Firmware 3.0.0.4.384_81792 was recently released and I don't know whether it was intentionally fixed in this release, but it's been a few days without the high CPU condition. Will continue to monitor and if it continues I'll give Merlin a go. Thanks guys!

-BJ

[bj_superstar]

Still no high CPU issues returning today on 3.0.0.4.384_81792.