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Amenel
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Message 16166 - Posted: 1 Apr 2013, 21:38:44 UTC

Hi all,

I'm starting this thread to ask for the Collatz tasks to be lowered in priority on Windows.

Using ProcessExplorer, I now see that the tasks processes run with a priority level of 6. This is new to me and I came across that fact while looking for a reason why my incremental backup software (Altaro's BackupFS), which is on an hourly schedule, now spends over hours backing up delta changes of a few megabytes.

What I realized is this: the backup service, at priority level 6, was having less than 0.4% CPU while Collatz was using up all 8 cores on 9 tasks including the GPU task to a total of 100% CPU utilization. Classic process starvation. The only other process (of 129 processes) at priority level 6 is a service for my printer's driver hosted by an svchost process. It's a good thing I wasn't scanning multi-pages documents!

The deal with BOINC projects, as I understood it, was to devote idle time to computing tasks without impeding the normal functioning of my computer system. In all obviousness, it's no longer the case for me but I'm sure that everything was fine up until around two weeks ago.

Maybe this project should return to the way things were, that is at priority level 4, just like WCG, even if we can limit the number of cores used and the CPU utilization.

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Message 16171 - Posted: 2 Apr 2013, 12:07:37 UTC - in response to Message 16166.

Hi all,

I'm starting this thread to ask for the Collatz tasks to be lowered in priority on Windows.

Using ProcessExplorer, I now see that the tasks processes run with a priority level of 6. This is new to me and I came across that fact while looking for a reason why my incremental backup software (Altaro's BackupFS), which is on an hourly schedule, now spends over hours backing up delta changes of a few megabytes.

What I realized is this: the backup service, at priority level 6, was having less than 0.4% CPU while Collatz was using up all 8 cores on 9 tasks including the GPU task to a total of 100% CPU utilization. Classic process starvation. The only other process (of 129 processes) at priority level 6 is a service for my printer's driver hosted by an svchost process. It's a good thing I wasn't scanning multi-pages documents!

The deal with BOINC projects, as I understood it, was to devote idle time to computing tasks without impeding the normal functioning of my computer system. In all obviousness, it's no longer the case for me but I'm sure that everything was fine up until around two weeks ago.

Maybe this project should return to the way things were, that is at priority level 4, just like WCG, even if we can limit the number of cores used and the CPU utilization.


I don't know anything about that but can point you in a different direction to maybe help yourself out in this case. Go into the Boinc Manager, which is down by the clock, and when it is open look in Tools, computing preferences. In there on the far right you will see a tab labelled exclusive applications. What that section is used for is exactly what you are talking about, when the program you put in that are a Boinc comes to a full stop, then resumes after that program is no longer running.

Another area that might help is in the processor usage tab in the same place. In it you will find a line that says "while processor usage is less than [} percent (zero means no restriction)". The default is 25 percent, meaning when your pc is at least 25% busy Boinc will stop and wait for it to stop doing whatever it is it is doing, and then resume. If you lower this, you will have to play with the numbers to find the happy balance point, then when your backup runs Boinc will stop and then resume crunching when the backup is done.


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