Hello, In such cases, try the Rhpc package.
The following is the result of the benchmark. http://prs.ism.ac.jp/~nakama/Rhpc/#benchmark # but tuning is not finished... 2014-12-06 10:36 GMT+09:00 Chris Paciorek <pacio...@stat.berkeley.edu>: > Looking at parLapplyLB, one sees that it takes in X and then passes > splitList(X, length(cl)) to clusterApplyLB, which then calls > dynamicClusterApply. Thus while dynamicClusterApply does handle tasks > in a load-balancing fashion, sending out individual tasks as previous > tasks complete, parLapplyLB preempts that by splitting up the tasks in > advance into as many groups of tasks as there are cluster processes. > This seems to defeat the purpose of load-balancing and of the manner > in which dynamicClusterApply is coded. > > This question basically repeats a question posed in 2013 -- see > http://r.789695.n4.nabble.com/parLapplyLB-Load-balancing-tt4671848.html > > I'm reposting because there doesn't seem to have been any response to > the previous posting, and it looks like the issue is still present in > R 3.1 so it seems asking again if this is the intended behavior of > parLapplyLB. > > I'm using R 3.1.1 and the 3.1.1 version of the parallel package under > Ubuntu 14.04, but the code appears to be the same in R-devel. > > > Chris > > > ---------------------------------------------------------------------------------------------- > Chris Paciorek > > Statistical Computing Consultant > Statistical Computing Facility, Econometrics Laboratory, Berkeley > Research Computing > > Office: 495 Evans Hall Email: pacio...@stat.berkeley.edu > Mailing Address: Voice: 510-842-6670 > Department of Statistics Fax: 510-642-7892 > 367 Evans Hall Skype: cjpaciorek > University of California, Berkeley WWW: > www.stat.berkeley.edu/~paciorek > Berkeley, CA 94720 USA Permanent forward: > pacio...@alumni.cmu.edu > > ______________________________________________ > R-devel@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-devel -- Best Regards, -- Eiji NAKAMA <nakama (a) ki.rim.or.jp> "\u4e2d\u9593\u6804\u6cbb" <nakama (a) ki.rim.or.jp> ______________________________________________ R-devel@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-devel