CPU at 100%

[Carnbroe]

The display on the web interface is showing that Core 1 is running at 100% so I SSH'd on and ran the top command, pressed 1 to show the two cores and now I'm confused as the total CPU is just over 1%.

I can see that the nice and idle values are however showing a different story. From what I can see top, ps etc within the busybox image provided don't have the ability to show ni values against tasks so is there are way to show them? If I re-boot the router (AC3200) then the core drops back to to the normal 0%-3% but some time later it flips back to 100%

On the plus side it doesn't appear to be affecting the routers ability to work as a router but other than a complete wipe and re-build from scratch is there a way to debug this or fix it?

 

[ColinTaylor]

... and now I'm confused as the total CPU is just over 1%.

No it isn't. CPU0 is 96.2% busy doing physical I/O. Do you have a USB drive attached?

 

[SomeWhereOverTheRainBow]

The display on the web interface is showing that Core 1 is running at 100% so I SSH'd on and ran the top command, pressed 1 to show the two cores and now I'm confused as the total CPU is just over 1%.

I can see that the nice and idle values are however showing a different story. From what I can see top, ps etc within the busybox image provided don't have the ability to show ni values against tasks so is there are way to show them? If I re-boot the router (AC3200) then the core drops back to to the normal 0%-3% but some time later it flips back to 100%

On the plus side it doesn't appear to be affecting the routers ability to work as a router but other than a complete wipe and re-build from scratch is there a way to debug this or fix it?

I would recommend downloading hitop with entware package. It will allow you to take a more defined look at what is going on.

 

[Carnbroe]

I would recommend downloading hitop with entware package. It will allow you to take a more defined look at what is going on.

Not sure if you meant hitop or htop ? tried opkg install hitop and it could not find the package. htop worked fine though and now shows the 'ni' column. thanks for the suggestion

 

[SomeWhereOverTheRainBow]

Htop, sorry about that ,thanks for the correction. I see my auto-fill tried to create a new program.

 

[Carnbroe]

I made a mistake reading the top output and its not a 'nice' issue but related to 'io' I've also noted that when the router re-starts then there are no aaews tasks or mastiff tasks so I've disabled the "NAT Tunelling on the Tools -> Other Settings page" (past post) . Lets hope that's fixed it but if not at least I'm now looking in the right area.

Installing 'htop' was a definite step forward but now installed 'atop' as well.

 

[ColinTaylor]

I made a mistake reading the top output and its not a 'nice' issue but related to 'io'

What, like I said in post #2?

 

[Carnbroe]

Not had any more issues so looks like turning off NAT tunneling (post #6) has resolved it. Thanks for all the helpful suggestions