LHC@home

Disabling macOS time sync early in the process helped as I stopped getting those kinds of messages and the last batch of tasks just completed successfully. As I was looking into your suggestion I noticed that when setting up a VM in VBox there's an option under System/Motherboard to specify "Hardware Clock in UTC Time". It's checked by default so I unchecked it and turned time sync in macOS back on (which is the default anyway). I'm curious to see if this simpler solution will also work as changing BIOS time and updating Windows registry and making sure that VMs are set up right is a bit more involved.

I have an odd one because it's not exactly this. The task has run over a day, but the % is just 99.982% and still incrementing. Is it going to turn into one of these? Or is there a reason some tasks might proceed way slower then the average, and it's still worth completing? Most of my ATLAS tasks complete more around 4ish hours, at times down to 2+ hours...

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You are running a mix of ATLAS/CMS/Theory.
Be so kind as to post a link to the task in question.

Most of my ATLAS tasks complete more around 4ish hours, at times down to 2+ hours...

When the runtime for Atlas is longer as you wrote (2-4 hours), something went wrong with this Task.
Have also a few per day went wrong, but hundreds are ok.
When you look into Boincmanager for this wrong task and see after half a hour no growing CPU-Task, you can delete this task.

The task was this one

https://lhcathome.cern.ch/lhcathome/result.php?resultid=356639181

I aborted, though it had progressed up to 99.998% from what I indicated earlier, which is why i was holding off. It definitely seemed to be an outlier....

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Since you already aborted the task the log doesn't contain useful debugging information except that it confirms it was an ATLAS task.
From another task log on the same computer:

2022-06-09 04:29:54 (246820): Setting CPU Count for VM. (7)

This computer has an i7-7700HQ CPU with 4 physical cores.
The VirtualBox experts recommend not to configure VMs with more than the available physical cores.
Hence, on this computer the limit would be 4.
You configured a 7-core VM.

See:
https://forums.virtualbox.org/viewtopic.php?f=35&t=77413

I do get a few per week, I don't really know how to fix it and overall its less than 1%, so I just abort them.