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World Community Grid Forums
Category: Completed Research
Forum: Help Fight Childhood Cancer Project Forum
Thread: Status question |
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Thread Status: Active Total posts in this thread: 12
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Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges: 
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Just received my first batch on my octo mac. In the status, it shows waiting for share memory instead of ready to run for the new wu's. Something new?
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Crunching for humanity since 2007!
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Nothing new. Autodock can use over 100MB, so it isn't ideal to have 8 processes running at the same time. If you have other programs using a lot of memory, BOINC will unload some tasks.
You can set the percentage of memory to allow BOINC to use in your preferences. |
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Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges:
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I crunch with 7 cores. Leave 1 free to take care of the OS. Looked weird seeing that so thought I would post. Only 3 of the new wu's show that. The rest show ready.
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Crunching for humanity since 2007!
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
I wrote a FAQ, all those years ago: http://www.worldcommunitygrid.org/forums/wcg/viewthread?thread=15699
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Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges:
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I read it. My preferences for memory is set at 100%. I have 10 GB ram so know i have plenty of memory.
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Crunching for humanity since 2007!
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Looking back at your first post, I see you said "waiting for share memory".
It's possible you have run across a Mac-specific issue with limited shared memory slots. Did you reboot? |
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Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges:
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I did after reading your post. Won't know until I download the next batch if that was the culprit. Could it be v 5.10 the cause?
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Crunching for humanity since 2007!
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hello Bearcat,
----------------------------------------Here is a 2007 thread about the Mac OS X limit of 8 shared memory segments. Presciently, they say that this will really bother BOINC if a Mac ever has 8 cores. It discusses ways to increase the number of shared memory segments in Mac OS X. http://boinc.berkeley.edu/dev/forum_thread.php?id=1871 I vaguely remembered reading this when it came out. Lawrence Added: It links to 'Configuring Shared Memory on Mac OS X ' by Spy Hill Research at http://www.spy-hill.net/help/apple/SharedMemory.html This gives a sample which multiplies everything in shared memory by 4. I see no reason to increase the allowed segment size from 4 MB to 16 MB nor any reason to increase the minimum size. However, it IS important to change the number of allowed shared memory segments from 8 (4 per core on a dual-core cpu) to 32 (4 per core on an octo-core cpu). [Edit 1 times, last edit by Former Member at Mar 14, 2009 4:03:00 PM] |
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Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges:
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Thanks for the info. Not sure I want to make that change as boinc is the only program that seems to have this problem. I read the info and was posted being fixed in 5.10 but I see there error message in v6 of boinc too so not sure what I plan to do. I just don't know what it will do to the rest of the programs not having this problem. Am going to try dropping to 6 cores crunching but something tells me this won't work. Have to check with other mac crunchers to see if they see this problem and if they did this fix.
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Crunching for humanity since 2007!
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Bearcat
Master Cruncher USA Joined: Jan 6, 2007 Post Count: 2803 Status: Offline Project Badges:
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BTW, this is the only project this happens in. Could it be this project being the problem?
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Crunching for humanity since 2007!
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