| Index | Recent Threads | Unanswered Threads | Who's Active | Guidelines | Search |
 |
World Community Grid Forums
Category: Completed Research
Forum: The Clean Energy Project - Phase 2 Forum
Thread: Elapsed time weirdness [RESOLVED] |
| No member browsing this thread |
|
Thread Status: Active Total posts in this thread: 34
|
|
| Author |
|
|
eviltoad
Senior Cruncher Australia Joined: Nov 5, 2005 Post Count: 190 Status: Offline Project Badges: 
|
There's something consistently odd with elapsed time reporting for CEP2 at the moment, and it appears to be happening both of my linux boxes:
----------------------------------------The elapsed time displayed on BOINC Manager while a task is in progress differs wildly from the figure given in the same column once the job is completed and ready to report. I actually noticed this yesterday and was for some time convinced that I'd been seeing things that weren't there, so I tracked the progress of two tasks this morning. These results are from the C2D host: E200012_365_A.15.C11H7NOSSi.67.1.set1d06_2 Visual inspection at 0944, Elapsed time and progress: 02.35.15, 13.932% Visual inspection at 0945, Elapsed time and progress: 02.36.50, 14.094% Visual inspection at 0947, Elapsed time and progress: 02.39.07, 14.305% Visual inspection at 0953, Elapsed time and progress: 02.45.07, 14.877% Visual inspection at 0958, Elapsed time and progress: 02.50.32, 15.387% Visual inspection at 1002, Elapsed time and progress: 02.54.25, 15.756% Visual inspection at 1002, Elapsed time and progress: 02.57.21, 16.017% Visual inspection at 1006, Elapsed time and progress: 01.55.36, 100.00% <====== == E200012_300_A.15.C11H7NOSSi.2.1.set1d06_2 Visual inspection at 0946, Elapsed time and progress: 02.37.56, 14.234% Visual inspection at 0947, Elapsed time and progress: 02.39.31, 14.381% Visual inspection at 0953, Elapsed time and progress: 02.45.07, 14.926% Visual inspection at 0958, Elapsed time and progress: 02.50.32, 15.434% Visual inspection at 1002, Elapsed time and progress: 02.54.30, 15.812% Visual inspection at 1004, Elapsed time and progress: 01.54.22, 100.00% <====== == So in these two cases I've lost elapsed time credit of approximately one hour per WU.  [Edit 1 times, last edit by eviltoad at Jul 2, 2010 10:31:04 AM] |
||
|
|
knreed
Former World Community Grid Tech Joined: Nov 8, 2004 Post Count: 4504 Status: Offline Project Badges: 
|
What version of the BOINC client?
|
||
|
|
eviltoad
Senior Cruncher Australia Joined: Nov 5, 2005 Post Count: 190 Status: Offline Project Badges:
|
It's 6.10.17 on the C2D (that's where the above results are from) and 6.2.15 on the C2Q.
----------------------------------------[Edit 1 times, last edit by eviltoad at Jul 1, 2010 12:30:02 AM] |
||
|
|
andreic
Advanced Cruncher Canada Joined: Nov 19, 2004 Post Count: 100 Status: Offline Project Badges:
|
I've noticed that my two boxen take about 2.5hours to reach ~24% complete. Then within a very short time (< 0.5 hours) the WU finishes.
It initially looks like it is going to run for 10-12 hours, but they have all finished in 2.5-3 hours. It has a very non-linear last 75%. Running 6.10.44 on a couple of Ubuntu 9.10 systems, Intel i3 530 quad core, 4GB RAM, yadda. |
||
|
|
Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
Plz see this earlier thread, http://www.worldcommunitygrid.org/forums/wcg/viewthread_thread,29263 and continue discussion there. And all have same.... never seen here percentages over 25 when the job finishes. (60 valid, 9 PV presently in the range of 1.5-2.75 hours)... they gradually seem to get longer.
----------------------------------------
WCG
Please help to make the Forums an enjoyable experience for All! |
||
|
|
eviltoad
Senior Cruncher Australia Joined: Nov 5, 2005 Post Count: 190 Status: Offline Project Badges:
|
This is not an issue with predicted vs. actual duration, but something like this:
----------------------------------------1. [Near end of WU] Actual CPU time elapsed: 2 hours 57 minutes 2. [WU completes] counter jumps backwards about an hour 3. [BOINC client reports] Reported CPU time: 1 hour 55 minutes Where does that one hour go? It may be too early to see the trend, but it looks as if my daily stats have dropped accordingly. |
||
|
|
Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
Are you sure about point 1 or are you're looking in the 6.4+ client at Elapsed/Wallclock time, exactly as what you discuss in your OP? What client version? Select the task and hit the properties button to see the CPU time that's counted together with Elapsed time. The difference is the time the system used... disallowed to BOINC.
----------------------------------------Till now, after 80+ production results, BOINCTasks reports for my quad about 15-25 minutes between Elapsed and CPU time, which is to be expected since I use the system and Firefox being kind of CPU hungry.
WCG
Please help to make the Forums an enjoyable experience for All! |
||
|
|
eviltoad
Senior Cruncher Australia Joined: Nov 5, 2005 Post Count: 190 Status: Offline Project Badges:
|
The data in my OP is from the 6.10.17 client, and I was looking at the elapsed time column in the Advanced View. So that column is actually wallclock time?
----------------------------------------I don't have any tasks nearing completion right now, but I'll track their progress and check Properties as you've suggested. |
||
|
|
Sekerob
Ace Cruncher Joined: Jul 24, 2005 Post Count: 20043 Status: Offline |
Elapsed=Wallclock. Since this was identified early when Berkeley switched (for GPU crunch implementation reasons), a Start Here FAQ was raised for those who wondered. See http://www.worldcommunitygrid.org/forums/wcg/viewthread_thread,26026
----------------------------------------
WCG
----------------------------------------Please help to make the Forums an enjoyable experience for All! [Edit 1 times, last edit by Sekerob at Jul 1, 2010 9:52:35 AM] |
||
|
|
eviltoad
Senior Cruncher Australia Joined: Nov 5, 2005 Post Count: 190 Status: Offline Project Badges:
|
Ah, okay.
----------------------------------------The confusion arose from toggling between a 6.10.17 and a 6.2.15 client in VNC -- I didn't notice the difference in column headings. |
||
|
|
|