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#21 Re: QuChemPedIA@home

Posted: Wed Jan 15, 2020 1:28 pm
by UBT - Woodles
The only errors I've had have been during downloading or cancelled by the server, none resulted in any time being lost.

However, I do have about a third ending up as invalid, most after 30 ish seconds but some running to the normal execution time.

Every one has invalids, it's a project "feature" :)

I'm getting about 50 credits an hour with a single thread, are you running them multithreaded?

#22 Re: QuChemPedIA@home

Posted: Wed Jan 15, 2020 1:37 pm
by davidbam
Thanks. No, not running MT. Does the last setting really mean # threads per WU ?
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#23 Re: QuChemPedIA@home

Posted: Wed Jan 15, 2020 1:56 pm
by UBT - Woodles
You would think so but no. I'm not sure what it's used for, I have it set to "No Limit" but tasks run on a single thread.

They have no work at the moment so I can't try different options.

The project developer has said that they've experimented and there's no advantage to using more than one core per workunit.

#24 Re: QuChemPedIA@home

Posted: Wed Jan 15, 2020 2:11 pm
by davidbam
Okay thanks. Maybe I'll try again later on a lesser machine but there is no way I am putting my thoroughbred 3900X onto something which has 50 out of 55 invalid :D

#25 Re: QuChemPedIA@home

Posted: Wed Jan 15, 2020 2:41 pm
by UBT - Woodles
Makes sense :lol:

#26 Re: QuChemPedIA@home

Posted: Thu Jan 16, 2020 8:47 am
by davidbam
tried an Intel machine this time, older OS (ubuntu 18.10): 3 valid, 74 invalid

Not a good ratio, especially when some of the invalid WU have run for 20-30 mins before failing.

#27 Re: QuChemPedIA@home

Posted: Thu Jan 16, 2020 9:07 am
by UBT - Woodles
I only have the one box on QuChem so can't help with different CPUs or OS.

If it helps, I've just downloaded four tasks and all ended up as invalid, three after 30 seconds, one after twenty minutes. Normally I'd get at least one valid out of four but it's a small sample size.

#28 Re: QuChemPedIA@home

Posted: Thu Jan 16, 2020 9:27 am
by davidbam
the CPU/OS may be a red herring but, out of interest, what are you running on please and I'll see if I have anything close

#29 Re: QuChemPedIA@home

Posted: Thu Jan 16, 2020 1:11 pm
by UBT - Woodles
It's a 1950X, default settings with 32 Gig of RAM running Ubuntu 19.04 if I remember correctly. QuChem is down again so I can't check.

Edit: Just had a thought and checked on WUProp, details are correct (also Boinc version 7.14.2 if it matters?)

#30 Re: QuChemPedIA@home

Posted: Thu Mar 04, 2021 7:55 pm
by Dirk Broer
Any specs on the machine in question? 64-bit is pretty standard on modern machines now.
I'd even go so far as saying that QuChemPedIA only has 64-bit apps for vbox (used for Windows and MacOS), and needs at least a 64-bit CPU for the rest (=Linux).