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World Community Grid Forums
Category: Active Research
Forum: Africa Rainfall Project
Thread: Eighteen hours? |
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Thread Status: Active Total posts in this thread: 8
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Stevie G
Cruncher United States Joined: Apr 10, 2020 Post Count: 24 Status: Offline Project Badges: 
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My computer just downloaded a WCG Africa Rainfall task which indicates the Time to completion is more than 18 hours. Is that possible? Is it normal?
----------------------------------------Stevie G Oldsmar, FL [Edit 1 times, last edit by Stevie G at Aug 11, 2020 3:43:44 AM] |
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Speedy51
Veteran Cruncher New Zealand Joined: Nov 4, 2005 Post Count: 1326 Status: Offline Project Badges: 
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Yes Stevie this is completely normal, these work units checkpoint only a time that is one checkpoint for every 12.5% complete. The average run times for these work units at the moment is over 22 hours. I average around the 12.25 hour mark however I have a high-end AMD processor 3900 X
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Macroman
Advanced Cruncher Joined: Jun 4, 2005 Post Count: 112 Status: Offline Project Badges: 
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my average is about 17 so that's par for the course.
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges: 
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Depending on the machine (in all cases Linux), I have for ARP1 WUs runtime between 15 hours (i7 6700K) and about 27 hours (Phenom II x6, 1055T).
----------------------------------------Cheers, Yves |
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Mike.Gibson
Ace Cruncher England Joined: Aug 23, 2007 Post Count: 12594 Status: Offline Project Badges:
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This also makes arp unsuitable if you shut down periodically because you can lose up to 3 hours crunching each time you shut down. Better to hibernate instead because you do not lose the crunching since the last checkpoint.
Mike |
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1684 Status: Offline Project Badges:
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On my side, I devote only some CPU cores (not more than 50% of CPU) to ARP1 and only on 24/7 Linux machines. Windows memory management is too bad for handling correctly and efficiently such large WUs.
----------------------------------------Currently my only one Windows (7 Pro x64) machine is fully devoted to OPN1 and MCM1 projects. Yves |
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Jim1348
Veteran Cruncher USA Joined: Jul 13, 2009 Post Count: 1066 Status: Offline Project Badges:
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By limiting it to two ARP1 at a time (using an app_config), I get run times of 11 hours or less on my Ryzen 3900X (Ubuntu 18.04.4). More work units slow it down accordingly, though I think it drops off more rapidly above four.
----------------------------------------PS - and avoid MIP, or limit it to two at most. They do not get along well with ARP. [Edit 1 times, last edit by Jim1348 at Aug 11, 2020 2:11:53 PM] |
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Mike.Gibson
Ace Cruncher England Joined: Aug 23, 2007 Post Count: 12594 Status: Offline Project Badges:
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arp and mip have different problems, but can be run together. However, arp should be restricted to at most half of your threads and mip to one third of your threads.
The best way to do this is to use app_config. For how to do this, please ask. Mike |
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