AC-88U 384.10_2 CPU usage discrepancies

[cyph]

I have a question regarding the CPU usage. In the Merlin GUI, it shows the CPU as pegging at 98-99% constantly. However, using top command from SSH, CPU is pegged at 50-55%.

I also noticed that when I reboot the router, the GUI will show CPU usage between 50-80%. However, after a day it's always showing 95%+ constantly. However, top tells a different story. Bug or working as intended?

 

[RMerlin]

Look at the top (...) of the top output. Some CPU usage comes from sirq, I/O, etc...

 

[cyph]

Look at the top (...) of the top output. Some CPU usage comes from sirq, I/O, etc...

Using H to switch between CPU's they are all in the 50% range.

Also, here is the CPU usage when it first start up:

After about a day, the CPU is constantly pegged at 98%.

Also this is the temperature with the CPU not pegged at max:

Once CPU is pegged at 98%, the temperature jumps to 184 F constant.

 

[cyph]

This is the top CPU usage when router first start up. It appears to be about 50% of what the ASUS GUI reports:

 

[RMerlin]

This is the top CPU usage when router first start up. It appears to be about 50% of what the ASUS GUI reports:

No, the webui is accurate. 36% of one core + 70% of a second core roughly equals 50% of TWO cores.

36/100 + 70/100 = 106/200

 

[ItsMeDude]

I have a question regarding the CPU usage. In the Merlin GUI, it shows the CPU as pegging at 98-99% constantly. However, using top command from SSH, CPU is pegged at 50-55%.

I also noticed that when I reboot the router, the GUI will show CPU usage between 50-80%. However, after a day it's always showing 95%+ constantly. However, top tells a different story. Bug or working as intended?

Are you using WTFast? I tried it out for a few min when I first got my router, and noticed very heavy CPU usage while it was enabled. At least one core was pegged at 100% utilization while the others bounced all over the place at a min of ~50%. As soon as I disabled it everything went back to normal. I have the AX88U, and it was all four cores.

 

[cyph]

No, the webui is accurate. 36% of one core + 70% of a second core roughly equals 50% of TWO cores.

36/100 + 70/100 = 106/200

Three hours later, the CPU is ow pegged at 95-98% constant. After reboot, the CPU process goes up and down normally. I haven't enabled anything extra since reboot. Something is causing the CPU to go into overdrive after a few hours. Temperature is now at 192 F.

Edit: Also notice how the graph doesn't have any information before. It think the temperature just spiked when it didn't. After reboot the graph was normal.

 

[cyph]

Are you using WTFast? I tried it out for a few min when I first got my router, and noticed very heavy CPU usage while it was enabled. At least one core was pegged at 100% utilization while the others bounced all over the place at a min of ~50%. As soon as I disabled it everything went back to normal. I have the AX88U, and it was all four cores.

No I didn't enable that. I did enable AIProtection. I may disable that and see if it helps. What I don't understand is this only happens after a few hours. It's normal for the first few hours after reboot.

 

[ItsMeDude]

No I didn't enable that. I did enable AIProtection. I may disable that and see if it helps. What I don't understand is this only happens after a few hours. It's normal for the first few hours after reboot.

Ah OK. I thought it was worth a shot. I'm sorry that it didn't help you.

Good luck finding what is causing it. That would drive me crazy until I got it fixed.

 

[cyph]

Three hours later, the CPU is ow pegged at 95-98% constant. After reboot, the CPU process goes up and down normally. I haven't enabled anything extra since reboot. Something is causing the CPU to go into overdrive after a few hours. Temperature is now at 192 F.

Edit: Also notice how the graph doesn't have any information before. It think the temperature just spiked when it didn't. After reboot the graph was normal.

Well, I think I resolved the issue but I have no idea which of the changes fixed it.

I uninstalled spdMerlin and ntpMerlin NTP daemon. I can't say for sure that either caused it but it's 4 hours later and the CPU spike no longer occurs.

 

[wizin]

Same here man, I though it was spedmerlin too, it fixes after reboot but then happens again

see my thread

https://www.snbforums.com/threads/ac86u-both-cores-ar-100-and-ram-at-92.56275/

 

[cyph]

Same here man, I though it was spedmerlin too, it fixes after reboot but then happens again

see my thread

https://www.snbforums.com/threads/ac86u-both-cores-ar-100-and-ram-at-92.56275/

Yup. I spoke too soon. This is my router the morning. There's definitely something amiss here...
I may revert to Asuswrt to see if the issue go away.

 

[cyph]

Same here man, I though it was spedmerlin too, it fixes after reboot but then happens again

see my thread

https://www.snbforums.com/threads/ac86u-both-cores-ar-100-and-ram-at-92.56275/

I just turned off AIProtection. This is what my CPU looks like now on reboot:

This is with diversion, Skynet, stubby DNS, and Yazfi running. Will update if this issue is resolved or it returns.

 

[el pescador]

had this last week and had been happening anytime i put diversion on.

you have to start again.

format usb in ext 4 format.
then re format the jffs on next boot.

there is a thread lurking about about how to install amtm....

 

[cyph]

had this last week and had been happening anytime i put diversion on.

you have to start again.

format usb in ext 4 format.
then re format the jffs on next boot.

there is a thread lurking about about how to install amtm....

It's already in ext 4. You're saying I have to reformat jffs to get rid of this issue?

I've installed diversion via amtm.

 

[dave14305]

There have been issues with Diversion trying to process the ash_history file if it's corrupted and consuming CPU. Since in your original screenshot there is a diversion script at the top of the list, I wonder if this is the same issue. If that top process has ash_history on the far right next time, try removing the offending file (rm /tmp/home/root/.ash_history).

 

[el pescador]

It's already in ext 4. You're saying I have to reformat jffs to get rid of this issue?

I've installed diversion via amtm.

https://www.snbforums.com/threads/recommended-usb-drive-for-scripts.56215/page-2#post-483810

This is the thread which solved my problem.

 

[cyph]

https://www.snbforums.com/threads/recommended-usb-drive-for-scripts.56215/page-2#post-483810

This is the thread which solved my problem.

Hmm... I actually followed the amtm instructions when I installed fresh. This is a brand new set up of Merlin firmware/router/usb thumb drive combo.

 

[cyph]

Update. Ever since I turned of AI Protection and diversion, reboot, turned diversion back on, tested it, and then turned on AI Protection, everything is back to normal again.

 

[wizin]

Update. Ever since I turned of AI Protection and diversion, reboot, turned diversion back on, tested it, and then turned on AI Protection, everything is back to normal again.

Yes, likewise - thanks