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World Community Grid Forums
Category: Support
Forum: BOINC Agent Support
Thread: do the tasks one by one |
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Thread Status: Active Total posts in this thread: 6
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hello everyone !
I recently downloaded BOINC and I encounter a small problem. BOINC Manager does 4 tasks at the same time. It takes a lot of time (more than 10 hours) and I can not run my computer for as long. I had to give up part of it because of it. Is it possible to configure BOINC to do the tasks one by one? Thank you. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Go to the BOINC Manager. Under TOOLS click on COMPUTING PREFERENCES. Click on PROCESSOR USAGE. Find "ON MULTIPROCESSOR SYSTEMS ,USE AT MOST". set this to 25% and click ok. This should set your computer to use only one of your 4 cores.
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tmedve
Senior Cruncher USA Joined: Nov 16, 2004 Post Count: 191 Status: Offline Project Badges: 
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Yes, as Raif son has said, you can reduce the number of tasks to 1 at a time, but that one task will still take the same amount of time to complete, ie:10+ hours.
If you select MIP1 or SCC1, the tasks are much shorter in time. |
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SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
Yes, as Raif son has said, you can reduce the number of tasks to 1 at a time, but that one task will still take the same amount of time to complete, ie:10+ hours. If you select MIP1 or SCC1, the tasks are much shorter in time. Actually, if that quad is a core 2 hyperthreaded, the lone task will run ALMOST twice as fast. Even running a 3 (75%) instead of 4 with HT will make tasks run faster. Not that it matters, as the unfinished tasks will be completed the next time the computer is powered up, resuming from last saved intermediate checkpoint. OH, and all scieneat WCG, , most sciences anywhere on BOINC are single threaded, which is generally most efficient. Multithreaded is often hampered by wait states, one piece waiting on a calculation from a parallel thread. [Edit 1 times, last edit by SekeRob* at Oct 1, 2017 2:18:48 PM] |
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enels
Senior Cruncher Joined: Apr 25, 2008 Post Count: 286 Status: Offline Project Badges:
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Good point SekeRob. I sometimes leave one hyperthreading thread idle. Since Core 4xxx Intel added another ALU and AGU which really helps move things along when hyperthreading.
The AMD Ryzen architecture is arguably better than Intel running current WCG tasks. This is because each Ryzen thread has its own integer units. Only sharing the FPU. This could change in a hurry if there is a project that uses AVX instructions. Intel has twice the AVX throughput as AMD Ryzen. |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Thank you all!
My computer is not very powerful. I think I would not have finished tasks before the deadline for submission if they were executed at the same time . Thanks again. |
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