Please Luc, use launchpad questions. "-j 1" should start jobs one after the other, no? Did you find simultaneous jobs running in that case?
Bruno On 27/04/11 01:36, luc scholtes wrote: > OK, thank you guys for your input. Now comes the second part of my > question... ;-) > > How to run YADE in batch mode such as only one calculation runs at a > time? In the current default mode, running YADE in batch mode launches > several calculations simultaneously (as much as the number of > available cores if I understood well), but I would like to allow only > one calculation at the same time, in an "iterative manner", one after > the other. The -j option does not seem to allow that... > > Cheers > > Luc > > 2011/4/19 Anton Gladky <[email protected] > <mailto:[email protected]>> > > 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] <mailto:[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] > <mailto:[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] <mailto:[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 > <https://launchpad.net/%7Eyade-dev> > >> > Post to : [email protected] > <mailto:[email protected]> > >> > Unsubscribe : https://launchpad.net/~yade-dev > <https://launchpad.net/%7Eyade-dev> > >> > More help : https://help.launchpad.net/ListHelp > >> > > >> > >> _______________________________________________ > >> Mailing list: https://launchpad.net/~yade-dev > <https://launchpad.net/%7Eyade-dev> > >> Post to : [email protected] > <mailto:[email protected]> > >> Unsubscribe : https://launchpad.net/~yade-dev > <https://launchpad.net/%7Eyade-dev> > >> More help : https://help.launchpad.net/ListHelp > > > > > > _______________________________________________ > Mailing list: https://launchpad.net/~yade-dev > <https://launchpad.net/%7Eyade-dev> > Post to : [email protected] > <mailto:[email protected]> > Unsubscribe : https://launchpad.net/~yade-dev > <https://launchpad.net/%7Eyade-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 -- _______________ Bruno Chareyre Associate Professor ENSE³ - Grenoble INP Lab. 3SR BP 53 - 38041, Grenoble cedex 9 - France Tél : +33 4 56 52 86 21 Fax : +33 4 76 82 70 43 ________________
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