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almarma

CPU usage stuck at 100% in one core after upgrade to 6.6.7

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Hi everybody,

 

I suddenly realized some days ago that there were newer UnRAID updates after UnRAID 6.4.x because they are no longer shown together with plugin updates as it was before. So I updated it and since then I see that one CPU is always at 100% usage and I see some errors at the System Log:

Mar 28 18:35:34 GALEON kernel: ACPI BIOS Error (bug): Could not resolve [\_SB.PCI0.SAT0.SPT4._GTF.DSSP], AE_NOT_FOUND (20180531/psargs-330) Mar 28 18:35:34 GALEON kernel: ACPI BIOS Error (bug): Could not resolve [\_SB.PCI0.SAT0.SPT4._GTF.DSSP], AE_NOT_FOUND (20180531/psargs-330) Mar 28 18:35:34 GALEON kernel: ACPI BIOS Error (bug): Could not resolve [\_SB.PCI0.SAT0.SPT5._GTF.DSSP], AE_NOT_FOUND (20180531/psargs-330) Mar 28 18:35:34 GALEON kernel: ACPI BIOS Error (bug): Could not resolve [\_SB.PCI0.SAT0.SPT5._GTF.DSSP], AE_NOT_FOUND (20180531/psargs-330) Mar 28 18:35:55 GALEON root: error: /webGui/include/ProcessStatus.php: wrong csrf_token

 

I attach also a Diagnostics file generated by unRAID and a screenshot showing the issue. Is this problem something to be worried about?

 

GALEON_Dashboard.png.4c9581958b442b5ac473ce8d347db905.png

 

Any help would be greatly appreciated.

 

 

galeon-diagnostics-20190328-1851.zip

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UPDATE: I've found a very interesting docker called Netdata with an insane amount of statistics about your server. I used it and checked CPU usage and found it was related to a media folder and also related to docker daemon. So I disabled the dockers one by one while checking Netdata tab and found out that when I disabled Plex media server, the CPU usage went down. I've tried a few times to restart it and it goes back to 100% usage. I'll try to find out what happens with it and report here so I can maybe help somebody else.

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There's currently an issue with Plex where if UPnP is enabled on your router (and not all implementations cause it), it causes a core to peg to 100%. I was seeing it occur locally, but after updating Plex to most recent build of Plex pass, it seemed to have gone away, however your mileage may vary. 

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On 3/28/2019 at 10:55 AM, almarma said:

I attach also a Diagnostics file generated by unRAID and a screenshot showing the issue.

Looking at top.txt file in your diags, Plex was indeed using 100% of your CPU at the time you generated your diagnostics:

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU  %MEM     TIME+ COMMAND
 5958 nobody    20   0 1314160  75948  36220 S 100.0   0.9  13:52.16 Plex Medi+

 

 

On 3/28/2019 at 10:55 AM, almarma said:

Mar 28 18:35:55 GALEON root: error: /webGui/include/ProcessStatus.php: wrong csrf_token

see this

 

On 3/28/2019 at 10:55 AM, almarma said:

Mar 28 18:35:34 GALEON kernel: ACPI BIOS Error (bug): Could not resolve [\_SB.PCI0.SAT0.SPT4._GTF.DSSP], AE_NOT_FOUND (20180531/psargs-330)

I didn't recognize that, but a Google search for "unraid ACPI BIOS Error" says it is harmless, although you might try checking for a bios update:

  https://forums.unraid.net/topic/75337-acpi-bios-errors-in-syslog/

 

 

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On 3/29/2019 at 5:48 PM, plttn said:

but after updating Plex to most recent build of Plex pass

Thank you for your answer. It's very good to know this issue exists. I don't have Plex pass so I suspect I can't update to the same release you have yet. I'll keep an eye on it

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