Really slow WU 16 hours instead of 1 to 2 hours

Message boards : Bug tracker : Really slow WU 16 hours instead of 1 to 2 hours

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Profile Laurent Lyaudet

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Joined: 22 Mar 23
Posts: 25
Credit: 103,951,160
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Message 1694 - Posted: 29 Jun 2023, 20:22:26 UTC
Last modified: 29 Jun 2023, 20:33:43 UTC

Hello,
My last WU was terribly slow :
https://sech.me/boinc/Amicable/workunit.php?wuid=27300137
Both elapsed time and remaining estimated time were increasing.
The completion percent increased very slowly.
I was at 25,948 % for a few minutes,
with elapsed 4:17:10 and remaining 12:14:10 approximately.
It is an mt task :
https://sech.me/boinc/Amicable/result.php?resultid=62973424
opencl_nvidia tasks in parallel work fine.
It seems to be the same bug than previously:
amicable_checkpoint file was corrupt with content:
0 0#
I cleaned amicable_checkpoint and other files.
And restarted it.
But after one hour is was still at less than 3,5 % with completion estimated in 6 days.
I stopped my computer, and restarted later and completion was back at less than 0,5 % !
I don't know what is wrong with this WU,
but clearly it could not be computed on my laptop for an unknown reason.
I had to abort it and switch to another.
Someone else had error on it also : https://sech.me/boinc/Amicable/result.php?resultid=62967700
It may be useful to have a look at it in detail.

Best regards,
Laurent Lyaudet
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Profile Laurent Lyaudet

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Joined: 22 Mar 23
Posts: 25
Credit: 103,951,160
RAC: 481,167
    
Message 1704 - Posted: 29 Jul 2023, 20:50:21 UTC - in response to Message 1694.  

Hello,
I had again a really slow WU but on GPU this time (opencl_nvidia).
This is my record so far.
https://sech.me/boinc/Amicable/workunit.php?wuid=27620016
/from 2^2*5*11*67*367*1237 /to 2^2*5*11*67*367*1303*21851 /task_size 30201578225
Total time : 18,423.51
CPU time : 350.37
Usually on my laptop a GPU task takes 10 to 15 minutes at most 30 minutes.
But this one took 5 hours 7 minutes and 3 seconds.
That's 10 times slower than a rare slow task on GPU and 30 times slower than a somewhat common fast task.
If something could be done to make this task faster, it would be great :)

Best regards,
Laurent Lyaudet
ID: 1704 · Rating: 0 · rate: Rate + / Rate - Report as offensive    Reply Quote

Message boards : Bug tracker : Really slow WU 16 hours instead of 1 to 2 hours


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