yade-dev team mailing list archive

[luc scholtes <lscholtes63@xxxxxxxxx>]

Hi guys,

sorry to wake up so late, but, I tried to find info concerning the -j/
--jobs option and could not really sort it all due to my lack of Linux
oriented knowledge... As I understand, YADE now run 1 thread (job?) per
core. Nonetheless, what would be the command to make it run 1 thread over
several/all cores in order to speed up the calculation (if it is the right
thing to do for this purpose)?

Thanks in advance

  Luc

2011/1/30 Anton Gladky <gladky.anton@xxxxxxxxx>

> Hi,
>
> In most of my simulations I use 1 thread/core and find it the most
> optimal solution. Also it helps to get completely identical results
> excluding openmp-instability. And only on a very large simulations
> (>10^5 particles) it is reasonable to use 2-3 threads, no more.
>
> So, I personally agree.
>
> Anton
>
>
>
>
> 2011/1/29 Václav Šmilauer <eu@xxxxxxxx>:
> > Hi there,
> >
> > due to numerous performance problems when Yade uses the default number of
> > threads (one thread per core), I think it would be better to make run
> > single-threaded by default, so that unknowledgeable people are not hit.
> > Those who know assign the right number of threads anyway.
> >
> > It would concern both the main program, and also the batch system, which
> > would still use all cores, but 1 core/job.
> >
> > Thoughts?
> >
> > v.
> >
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