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Kworker events_power_efficient consumes 100% of the CPU

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Hi!
Recently my unraid machine have started become unresponsive after approximately 3 days after reboot. As you can see in the attached image the kworker events_power_efficient consumes all the cpu and there are several other kworker kblocked processes filling up the rest of the top consuming processes. The web GUI is unresponsive so I don't know how to save the System Diagnostics.

Worth noting is that the machine has been running non-stop perfectly for four months before this started happening earlier this week. 

tower_kworker.png

  • Community Expert

Try getting the diags on the console by typing "diagnostics", also make sure to see if it still happens if you boot in safe mode.

  • Author

I had to reboot the machine because now even the console where unresponsive. After reboot I manage to collect the diagnostics.

tower-diagnostics-20201031-1233.zip

 

Edit:

Note that I did not start the array when the collected this diagnostics file. It just occurred to me that it might be required.
Should I collect another diagnostics file or is the one above enough?

Edited by sywor

  • Community Expert

Diags after rebooting won't be much help, also don't forget to try safe mode.

  • Author

Booted into safe mode, started the array and let it run for an hour. So far everything seams normal as far as I can see. 

tower-diagnostics-20201031-1353.zip

  • Author

Bumping my own thread. The problem is still there even in safe mode. And since the kworker consumes all the CPU the diagnostics never completes, even when I run it from the console. 

  • Community Expert
On 10/31/2020 at 12:55 PM, sywor said:

So far everything seams normal as far as I can see. 

No need to bump, you said everything was normal in safe mode, and the diags are consistent with that, if it isn't please post diags showing that.

  • Author
9 hours ago, JorgeB said:

No need to bump, you said everything was normal in safe mode, and the diags are consistent with that, if it isn't please post diags showing that.

No that's not what I wrote. I cannot export diagnostics when it happens since it is by then it is already too late to do anything. Anyways.

I have now turned on syslog persistence to flash. hoppfull at least the syslog should be saved when it happens again. 

Edited by sywor

  • Community Expert
20 minutes ago, sywor said:

No that's not what I wrote. I cannot export diagnostics when it happens since it is by then it is already too late to do anything. Anyways.

That's why I said no need to say you're bumping the thread, just report that.

 

21 minutes ago, sywor said:

I have now turned on syslog persistence to flash. hoppfull at least the syslog should be saved when it happens again. 

That's worth a try, hopefully it will catch something.

  • 3 weeks later...
  • Author

The fault is back, this time the machine stayed up for 10 days. And the syslog is full of something suspicious I cannot decipher. It starts at 02:07:13 this morning (Nov 21) on row 358. Is my CPU broken?

syslog

  • Community Expert

Those errors are like related, but can't say what's causing them, you thing you can try is the latest beta, newer kernel works better with Ryzen.

  • Author

Just booted into version 6.9.0-beta35. Lets see if it helps. 

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