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[Fu zuoguang <question240608@xxxxxxxxxxxxxxxxxxxxx>]

Question #240608 on Yade changed:
https://answers.launchpad.net/yade/+question/240608

    Status: Answered => Open

Fu zuoguang is still having a problem:
Dear Bruno Chareyre and all users:
    Thanks for the help! YADE batch mode, as I know, is just for running n jobs at the 
same time using N threads( n<=N ). Am I right? If yes, I then have some noticeable 
questions to ask for your advice, which are:

(1). If I just have only one job to run, just like that day, I just need to run
biaxial compression test simulation, my question can be described as only 1 job using
N threads. Can YADE batch mode help it to get sucessfully a high speed running? If no,
is this mean that YADE batch mode can bring us a competitive running mode when 
the running tasks are more than one? 

(2). If the answer of the above is yes and I start my running just in YADE, not in
yade batch, the default option of thread used by this running is just one, am I right?

(3). The method of assigning determined threads for jobs. I have gotten information from
Klaus Thoeni (klaus.thoeni) said on 2014-02-20:

yade-batch -j1 --job-threads=2 file.table file.py: should still use one core, but I never used it
yade-batch -j2 --job-threads=2 file.table file.py: one simulation at a time with 2 cores
yade-batch -j4 --job-threads=2 file.table file.py: two simulations at a time with 2 cores each
yade-batch -j16 --job-threads=1 file.table file.py: 16 simulations at a time with 1 core each

In above description, j means the number of jobs and job-threads means the total number of threads
for all the jobs. Is this right? But I can not understand why 'two simulations at a time with 2 
cores each' in the third row.

(4).I have tried this way for my own simulation. It is as :
yadedaily-batch -j1 --job-threads=7 file.py

But yade gave me an error warning like that:

Running 1 stand-alone simulation(s) in batch mode.
WARNING:root:WARNING: job #0 will use 7 cores but only 1 are available
WARNING:root:Job #0 will be uselessly run with 7 threads (compiled without OpenMP support).
Master process pid 14997

How to get these problems ? Seeking your help!

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