Hi, luc, If you start yade without -j option, it will use just 1 thread. As Klaus already said, you can start yade with -j6 to start yade in 6 threads.
But you should be careful. If you do not use a large number of particles, more threads can lead you to decreasing of calculation speed. That is why yade starts now by default in 1 thread mode not to confuse new users. Anton On Tue, Apr 19, 2011 at 4:39 AM, luc scholtes <[email protected]> wrote: > 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 <[email protected]> >> >> 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 <[email protected]>: >> > 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. >> > >> > _______________________________________________ >> > Mailing list: https://launchpad.net/~yade-dev >> > Post to : [email protected] >> > Unsubscribe : https://launchpad.net/~yade-dev >> > More help : https://help.launchpad.net/ListHelp >> > >> >> _______________________________________________ >> Mailing list: https://launchpad.net/~yade-dev >> Post to : [email protected] >> Unsubscribe : https://launchpad.net/~yade-dev >> More help : https://help.launchpad.net/ListHelp > > _______________________________________________ Mailing list: https://launchpad.net/~yade-dev Post to : [email protected] Unsubscribe : https://launchpad.net/~yade-dev More help : https://help.launchpad.net/ListHelp
