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World Community Grid Forums
Category: Active Research
Forum: Africa Rainfall Project
Thread: Not enough time given for a task |
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Thread Status: Active Total posts in this thread: 102
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MattShizzle
Cruncher United States Joined: Aug 23, 2009 Post Count: 28 Status: Offline Project Badges: 
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Agreed it's ridiculous, I haven't been able to finish one yet. Not everyone has a high end computer or a spare one to run only doing BOINC. Remember BOINC is for background when not busy on your computer. It's says it's like 18 hours but really way more. Not running when it's off or when playing a game and really only advances 1 second maybe every 3 or 4 second and for my last - expired yesterday just gave up, but there were 18 hours left and only 25% complete since given. Need some shorter ones. Use a supercomputer for these monster ones.
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TonyEllis
Senior Cruncher Australia Joined: Jul 9, 2008 Post Count: 259 Status: Offline Project Badges: 
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Agreed it's ridiculous Have to disagree here... is like complaining that you cannot fit a king size bed into the trunk (boot) of your vehicle. There several projects that have smaller run times to choose from. Run those suitable for the speed of your machine. Horses for courses. Use a suitable device for the work to be accomplished etc. By the way - you don't need a "supercomputer" to run ARP. My 8 year old i3 desktop completes these WUs in the 21 to 23 hour time frame.
Run Time Stats https://grassmere-productions.no-ip.biz/
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1671 Status: Offline Project Badges: 
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By the way - you don't need a "supercomputer" to run ARP. My 8 year old i3 desktop completes these WUs in the 21 to 23 hour time frame. I agree with TonyEllis : my two 10 years old Phenom II x6 (with 8 resp. 16 GB RAM) compute ARP1 WUs within 23 - 28 hours without overclocking. I limit the number of concurrent ARP1 to 50% of the At the other side on a i7 6700K (16 GB RAM), an ARP1 WU requires between 15 and 18 hours computation time with 4 concurrent ARP1 WUs. All these machines run Linux. Cheers, Yves ---------------------------------------- [Edit 1 times, last edit by KerSamson at Oct 1, 2020 6:54:04 PM] |
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Mike.Gibson
Ace Cruncher England Joined: Aug 23, 2007 Post Count: 12160 Status: Offline Project Badges: 
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The general rule of thumb for arp is to restrict them to half the available threads because of the amount of time spent on checkpointing and uploading. MIP should be restricted to one third of them. The remaining threads can be used for any of the other projects.
This has deviated from my original point which was that the arp resend should not have been sent to a machine that is slow and WCG systems are not supposed to do that. Mike |
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MattShizzle
Cruncher United States Joined: Aug 23, 2009 Post Count: 28 Status: Offline Project Badges:
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Yeah, I just unchecked this one. My computer (desktop) is only a bit over a year old and can't handle it.
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
To be clear, 3.5 day deadline tasks go to machines that have a current record of returning results within that time frame. A machine that has no history for ARP to return results within 3.5 days is not supposed to get them. If that science specific rule is in place in the feeder than it needs checking.
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spRocket
Senior Cruncher Joined: Mar 25, 2020 Post Count: 262 Status: Offline Project Badges: 
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Yup, if your machine is getting short-deadline tasks on any WCG project, that means it has a track record of returning valid, timely results. Still, I had an ARP unit land on one of my old laptops that ended taking 40+ hours on a throttled i7 mobile CPU. It completed within the deadline, but after that, I juggled things around a bit: three ARP threads for my Ryzen 7 desktop, one for most other systems, and none on the laptops. I've only ever seen OPN on the Raspberry Pi systems.
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KerSamson
Master Cruncher Switzerland Joined: Jan 29, 2007 Post Count: 1671 Status: Offline Project Badges:
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On my Ryzen 7 2700, I usually run a max of (number of core - 1) for ARP1, i.e. 7 ARP1 WUs concurrently computed.
----------------------------------------Yves |
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MattShizzle
Cruncher United States Joined: Aug 23, 2009 Post Count: 28 Status: Offline Project Badges:
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They were 7 day, but for my computer would need at least 20 days for those. I do regularly return results for all the WCG active projects except this one and they are generally a lot smaller AND give about a month. Weather@home (climate prediction other project) gives ones that are probably bigger, but gives almost a YEAR to complete.
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RTS48
Veteran Cruncher Bolivia Joined: Aug 2, 2009 Post Count: 1350 Status: Offline Project Badges: 
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I don't know if it was covered above but as I keep 10 days projects active then the ARP WU takes 10 days to rise to the top and then 2 days to crunch. If all that is happening is that the WU is discarded because it is too late then I feel that I am wasting my time with ARP which is a shame. At this moment my Results Status says that an ARP WU is No Reply even though it was due today and will complete before the end of the day.
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Rod Peel
Santa Cruz Bolivia South America  ,  |
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