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World Community Grid Forums
Category: Completed Research
Forum: Outsmart Ebola Together
Thread: Very Short Tasks |
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Thread Status: Active Total posts in this thread: 26
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SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
... and indeed minutes later 8 arrive [in bits an pieces].
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Mumak
Senior Cruncher Joined: Dec 7, 2012 Post Count: 477 Status: Offline Project Badges: 
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Odd is how the estimated task runtime works in this case. When such short tasks start to appear their estimated time is same as the longer ones. Later, the time starts dropping, but when the supply of short WUs stops, the estimated runtime of the longer tasks is that of the short ones, while the shorter ones are estimated to take longer. This also causes a huge overload of longer tasks downloaded.
----------------------------------------Here a sample what happened after the short ones stopped and normal ones started flowing in: OET1_0001862_xSDGP-S_rig_37070_0: est runtime 00:17:01 OET1_0001846_xSDGP-FW_rig_71171_2: est runtime 00:56:16 That's the exact opposite of reality. Both tasks have almost same est. computation size -FW: 10038 GFLOPs , -S: 10168 GFLOPs How does this estimation work, is only the client calculating this ?  [Edit 1 times, last edit by Mumak at Feb 27, 2016 8:10:10 PM] |
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SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
We're done with shorts it seems... got 1862-1869 and the occasional 1872, meaning soon we'll be making the batch jump forward again, to then step back and do [almost] all those in-between. Runtimes now in the 1.5-2 hours range on the 3770K at 3Ghz.
Mumak how it functions has been discussed frequently... it works on a feedback loop, the projected FPOPS for new tasks fed off the running average of work being returned i.e. always trailing reality. |
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SekeRob
Master Cruncher Joined: Jan 7, 2013 Post Count: 2741 Status: Offline |
The whippets
---------------------------------------- [Edit 1 times, last edit by SekeRob* at Mar 13, 2016 5:19:33 PM] |
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Mumak
Senior Cruncher Joined: Dec 7, 2012 Post Count: 477 Status: Offline Project Badges:
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Yep, that's the problem I'm experiencing too. Also the credit claimed acts similar - once the short tasks start it's higher, then upon return of normal tasks these get a lower credit than usual.
----------------------------------------BTW, originally each short task supply lasted ~2-2.5 days, the recent series lasted however only for 1 day. So it seems the supply is decreasing. |
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Speedy51
Veteran Cruncher New Zealand Joined: Nov 4, 2005 Post Count: 1326 Status: Offline Project Badges: 
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OET1_ 0001894_ xZAGP-FW_ rig_ 46544_ 0-- ran for 6.6 minutes on a I 7 5960 X at stock 3.0 Windows 10 professional 64 bit
---------------------------------------- [Edit 1 times, last edit by Speedy51 at Mar 28, 2016 3:36:44 AM] |
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