Question #679153 on Yade changed:
https://answers.launchpad.net/yade/+question/679153
Status: Open => Answered
Jan Stránský proposed the following answer:
Hello,
> What is going on here?
see
yadedaily-batch --help
and --job-threads option. The default value is 1, therefore you see 4 cores,
for each task 1 core
> to take full advantage of CPU
this is a tricky part.
If your simulations take comparable amount of time, I would use
yadedaily-batch -j 12 --job-threads 3 ...
to use 12 cores, but to decrease "parallel overhead"
If your simulations differ very much in length, you can use --job-threads 12
not to wait too long for unfinished jobs.
BUT, it may happen that using 12 cores take more time then, e.g., 6 cores :-)
So to take really "full advantage of CPU", you have to play a bit :-)
cheers
Jan
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