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World Community Grid Forums
Category: Support
Forum: BOINC Agent Support
Thread: Loosing half of cores if BOINC Manager is covered up |
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Thread Status: Active Total posts in this thread: 10
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liturgist
Cruncher Joined: May 9, 2020 Post Count: 28 Status: Offline |
I am running BOINC 8.0.2 (x64) on Windows 11.
If the BOINC Manager application is covered by another application being full screen, then half of the CPU cores appear to stop processing as viewed from Task Manager. The first 16 of the 32 cores will go to very little or no utilization. Bringing the BOINC Manager window to the forefront will restore utilization. |
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TPCBF
Master Cruncher USA Joined: Jan 2, 2011 Post Count: 2173 Status: Offline Project Badges: 
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Seems like normal behavior for a system with those CPUs that have partially high-power and partially low-power cores.
Also, it all depends on how much of the CPUs you are assigning in the "Computing preferences" of the BOINC agent... Ralf |
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AgrFan
Senior Cruncher USA Joined: Apr 17, 2008 Post Count: 396 Status: Offline Project Badges: 
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i9-14900
----------------------------------------Total Cores 24 # of Performance-cores 8 # of Efficient-cores 16 Total Threads 32 Try setting "Use at most xx% of the CPUs" to 50% in "Computing preferences ..." to force only the p-cores to be used. If this doesn't work, the only other solution is to use a third-party product (eg. Process Lasso) to assign processes to specific cores or disable the e-cores in the BIOS which would negatively impact performance of the entire system. Unfortunately, the behavior you're experiencing is a BOINC limitation of the Windows task scheduler and the Intel hybrid architecture. This issue was reported back in August 2023. The OP solved it by closing the BOINC Manager and NOT stopping the tasks and opening the BOINC Manager again. I'm not sure if this will work in your case. It's worth a try ... https://www.worldcommunitygrid.org/forums/wcg...ead,45522_offset,0#688716
[Edit 25 times, last edit by AgrFan at Jun 25, 2025 10:55:59 PM] |
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liturgist
Cruncher Joined: May 9, 2020 Post Count: 28 Status: Offline |
Thanks for your suggestion. It did not seem to work on this system.
i9-14900, 2.0 Ghz, 24 Core(s), 32 Logical Processor(s) |
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Boca Raton Community HS
Senior Cruncher Joined: Aug 27, 2021 Post Count: 209 Status: Offline Project Badges: 
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Here is a question. Are you using all your cores? Are you also using the pc for other uses? We have a 14900KS and we disabled the e cores. Helped with thermals and it can't offload work to the e cores since they are off. Of course, if you want/need the e cores as well, then it gets more complex.
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liturgist
Cruncher Joined: May 9, 2020 Post Count: 28 Status: Offline |
It appears that all cores are enabled. BOINC is most of what the machine does. I use it for browsing and email; nothing very serious. I do not have any indication that there are thermal issues.
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Boca Raton Community HS
Senior Cruncher Joined: Aug 27, 2021 Post Count: 209 Status: Offline Project Badges:
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Did you build the system or is it from an OEM like Dell? That CPU is really tricky to work with when you want to run prolonged work across cores, such as any work on WCG. Is this a Windows system? Also, in one of your posts you said 2.0GHz. Where are you seeing that speed? The base clock of the e cores is faster than that, so I am curious where you see that. Also, how many tasks are you running at the same time? Sorry for all the questions but hoping to help since we are familiar with the difficulty of this CPU.
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adict2jane
Cruncher Joined: Aug 18, 2006 Post Count: 35 Status: Recently Active Project Badges:
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This issue is caused by Windows. I have multiple Intel 12th, 13th, and 14th generation computers and all exhibited the same symptoms.
Go to your power, sleep, and battery settings in your Windows settings. Under power mode, choose "high performance" This should solve your issue. You may need to restart to see the change take effect. Hope it works! |
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BobbyB
Veteran Cruncher Canada Joined: Apr 25, 2020 Post Count: 638 Status: Offline Project Badges: 
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I have a question. I don't question half the cores dropping when BOINC Manager is covered up.
Why is the BOINC Manager application up? It's not needed for BOINCing. With task manager running and showing on the taskbar it should be showing 100% CPU. Yeah once in a while you look and see but then close it. When I had 2 older laptops running they never had BOINC Manager running but they were Windows 10.running Boinc 7 something |
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deltavee
Ace Cruncher Texas Hill Country Joined: Nov 17, 2004 Post Count: 4894 Status: Offline Project Badges: 
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Just a thought: Check the Boinc Manager's Advanced View tab called "Activity". Make sure that Run Always is selected.
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