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numbermaniac
Cruncher Australia Joined: Mar 28, 2014 Post Count: 46 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Will I forever have to put up with these OET tasks that don't checkpoint for 3 hours or is anything new coming up? It's ridiculous losing hours of work when I press pause.
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SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
Mine does not in 99% of the cases. Sometimes am the whole day on the road, come back, connect to juice and hit 'Resume', and it goes on to the minute where it left off, and valid. Last trip, put it in the car, navigator on and waited for 100% charge, then hit resume and almost whole trip of 12 hours it did 'mobile' computing [Sits front of the airco vent with an Tetrax Xway magnetic seat], Wifi specifically disabled in the OS. Why this unloading happens to one and not the other is unknown to me, and frankly we have discussed this enough times and tried to determine why, but found no root cause. Very possibly it's short of RAM [OET requirements are not high though], no 'swap file' concept that I'm aware off. When the device needs RAM it will kick the oldest idle out [A guess], or choke.
----------------------------------------[Edit 1 times, last edit by SekeRob* at Oct 22, 2015 10:50:32 AM] |
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numbermaniac
Cruncher Australia Joined: Mar 28, 2014 Post Count: 46 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
I don't think it's RAM related. Android won't kill kernel processes when low on memory, which is how individual BOINC tasks run. Unless it kills the whole BOINC client and Manager, which would cause the individual tasks to also be stopped. It's more that when you press pause, BOINC takes it out of memory so next time it continues from the last saved position.
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NixChix
Veteran Cruncher United States Joined: Apr 29, 2007 Post Count: 1187 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
On one device I literally watched as the CPU time counted up and then reset back to a former time repeatedly. I had now idea how long it was doing this. I observed this serveral times with different jobs. Without any logs to figure out what it was doing I just gave up and and unistalled from that device.
----------------------------------------Another old Samsung device I have has everything de-installed except BOINC and it "appears" to work. The server results stats tell me it is turning in a few WU every day, but 7-44 daily CPU hours for a 2-core processor running 24x7 is far less than 50% of what it should be doing. I should pull the plug on that one too. Cheers ![]() ![]() |
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Alessio Susi
Cruncher Italy Joined: Mar 7, 2015 Post Count: 17 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
The project saves a checkpoint every 12.5% (25% the first time) and sometimes it happens that when it arrives at 100%, it needs some time to complete the task (sometimes even 2 hours). So it's normal that it returnes back to 50 / 62.5 / 75% and so on when you stop the research.
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ASUS X570 E-Gaming
AMD Ryzen 9 3950X, 16 core / 32 thread 4.4 GHz AMD Radeon Sapphire RX 480 4GB Nitro+ Nvidia GTX 1080 Ti Gaming X Trio 4x16 GB Corsair Vengeance RGB 3466 MHz ![]() |
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SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
Just to be sure, the *observed* 100% state can by as long as 9 hours. Why? Probably the program makes an estimate of progress at start, then writes a checkpoint every so much time passed, but then when the computation proofs non-linear in some way, the overage is not checkpointed until finished.
Notably, I've tested this and on interruption the ones subjected to the test reverted to 99.9%, quickly moved to 100% and the same... hours on end in this state, *but*, they do finish properly and validate. Remember, this was originally an app [based on AD Vina] without any checkpointing, then with lots of programming effort forced to write one at those 12.5% intervals. Opt-out or let it run it's course... hardly costing pennies. In the news yesterday, the disease is very very difficult to eradicate... it can return out of nowhere [hiding in human tissue like AIDS does too], so any pennies help is lots appreciated. Maybe your device finds the magic compound. :O) --//-- |
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Former Member
Cruncher Joined: May 22, 2018 Post Count: 0 Status: Offline |
Hi,
is there a way to set the checkpoint manulally in the client or setting in the wcg web site? or any other way to keep the Project in the RAM and start from where it puased ? I do not close the application, even pulling the power cord for a few minutes rools back the Project. that's loosing lots of work! İt can safely stay in the RAM ??! |
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SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
[Unfortunately], not. The checkpointing is hardcoded to just those 8 over the full runtime of a task.
The piece about tasks unloading quite quickly is reported by more, but I ain't seeing it. Can be away all day and use the tablet, then when back plug in and resumption from where it got suspended [manually to stop the battery eating]. Gaming in the house and leaving BOINC continue till 30% charge, plug in and resume without loss. Very occasionally it drops back, but why, no idea. BTW did discover this android has a .5GB storage allocation in the /cache location of which 10mb is used, never seen more. Similar there's /storage of .911GB, always 100% free, but that same number shows up for various folders such as /data, /dev and /mnt so it looks they're reporting the same [shared] space from root. |
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enels
Senior Cruncher Joined: Apr 25, 2008 Post Count: 286 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
According to the Research Page you will have to put up with OET tasks until May 2016. I hope another VINA Android project comes first.
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vlado101
Senior Cruncher Joined: Jul 23, 2013 Post Count: 226 Status: Offline Project Badges: ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() |
Hmm, I am not sure if this is helpful, but I noticed that my OET workunits did not restart when I disabled pause when screen is on option for BOINC. I tried a test where I only set one core to run at 100% and that would not pause. The workunit finished from start to finish and then completed. I am thinking of just using that so that I would be able to constantly have it run in the background. I think me using my phone kept suspending it and thus making it go to the previous check point.
----------------------------------------Did anyone else try this? ![]() |
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