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AC-88U 384.10_2 CPU usage discrepancies

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cyph

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


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:
Screen-Shot-2019-04-26-at-3-36-54-PM.png


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

Also this is the temperature with the CPU not pegged at max:
Screen-Shot-2019-04-26-at-3-40-04-PM.png


Once CPU is pegged at 98%, the temperature jumps to 184 F constant.
 
This is the top CPU usage when router first start up. It appears to be about 50% of what the ASUS GUI reports:
Screen-Shot-2019-04-26-at-3-46-16-PM.png
 
This is the top CPU usage when router first start up. It appears to be about 50% of what the ASUS GUI reports:
Screen-Shot-2019-04-26-at-3-46-16-PM.png

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
 
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.
 
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
Screen-Shot-2019-04-26-at-7-12-24-PM.png


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.
 
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.
 
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.
 
Screen-Shot-2019-04-26-at-7-12-24-PM.png


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.
 
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....
 
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.
 
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).
 
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.
 
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
 

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