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World Community Grid Forums
Category: Community
Forum: Hardware Chat Room
Thread: Quick question: to hyperthread, or not? |
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Thread Status: Active Total posts in this thread: 4
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kylinblue
Cruncher Joined: Jun 18, 2015 Post Count: 11 Status: Offline Project Badges: 
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Dual socket Xeon, Linux, NUMA is apparently enabled. Should I use 50%, 75%, 100%-1 or 100% for a dedicated WCG server?
----------------------------------------[Edit 1 times, last edit by kylinblue at Aug 7, 2016 3:32:57 AM] |
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SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
There's no 'should', it's all voluntary :O)
According this thread https://secure.worldcommunitygrid.org/forums/...ead_thread,38956_offset,0 HSTb has a limit of 32 threads after which more concurrent of this science drops the efficiency. Whether this is NUMA related, it does not say. All other except for CEP2 can run all out. |
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fuzzydice555
Advanced Cruncher Joined: Mar 25, 2015 Post Count: 89 Status: Offline Project Badges: 
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HyperThreading adds 20% performance for 20% more power consumption, if I remember correctly.
----------------------------------------So unless your work units aren't finishing in time, there isn't much reason to turn it off. If you do turn it off, do it in the bios instead of setting a CPU percentage in boinc. NUMA doesn't do anything for BOINC as far as I know, it's a nice feature to have though :) So unless you use the rig for somehing else as well, go 100%.  |
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enels
Senior Cruncher Joined: Apr 25, 2008 Post Count: 286 Status: Offline Project Badges:
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Hyperthreading also generates twice the runtime.
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