LHC@home

Hello,

What is the exact purpose of this setting? I did notice that when I have it checked my PCs will not get any CMS tasks. When I have it unchecked, my PCs will not get any Theory tasks, but will get CMS tasks. It is like they are somehow mutually exclusive. I must say that, according to project preferences, I can get tasks for every app, but never have I ever got a task for ATLAS. The situation is a bit confusing to me. Any piece of info will be greatly appreciated!

Thank you in advance!

To give a better advice a closer look into your computer details and task logs would be helpful.
Hence, you may make your computers visible for other volunteers:
https://lhcathome.cern.ch/lhcathome/prefs.php?subset=project

Regarding "Run native if available?":
This must be left unchecked if you run Windows.

Done, they are now public.

1st PC: https://lhcathome.cern.ch/lhcathome/show_host_detail.php?hostid=10651636
2nd PC: https://lhcathome.cern.ch/lhcathome/show_host_detail.php?hostid=10656978

The project server sends out tasks in the order of their appearence in the ready-to-send-queue but skips task that do not meet all requirements, e.g. unchecked at the prefs page or computer's capabilities.
Theory and CMS should work with the settings mentioned earlier.


ATLAS is more tricky since it is a multicore app.
Most volunteers set their prefs to "unlimited #CPUs" which makes the server estimate a RAM requirement of up to 10200 MB (vbox tasks, 8 CPUs).
One of your computers has only 8 GB and will not get any ATLAS task until you limit the prefs to 4 CPUs.



5 CPUs would be possible according to the RAM formula but would leave only 500 MB RAM for the OS and all other processes.

RAM formula:
3000 MB + n_cpus * 900 MB

Okay, that was great info, thank you! It raised a question though: If "Max # CPUs" ultimately limits RAM usage, then "Max # jobs" limits the number of jobs that a single vbox task is allowed to run?

I will keep an eye on how tasks keep coming to me, just to see if limiting those solved the problem of not getting one app or another.

Thanks a lot, I will keep you updated!

"Max # jobs" is a server side limit regarding the #tasks you are allowed to download.

If you want to limit the number of concurrently running tasks take a look into the app_config.xml manual.
<max_concurrent>
<project_max_concurrent>

https://boinc.berkeley.edu/wiki/Client_configuration