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MPB(1) MIT Photonic-Bands Package MPB(1) NAME mpb-split - compute eigenmodes with MPB using multiple processes SYNOPSIS mpb-split NUM-SPLIT [DEFINITION]... [CTLFILE]... DESCRIPTION mpb-split is a parallelizing front-end to MIT Photonic Bands (MPB). For a computation with several k points, it splits the list of k points over multiple processes. Of course, this will only benefit you on a system where different processes will run on different processors, such as an SMP or a cluster with automatic process migration (e.g. MOSIX). mpb-split is actually a trivial shell script, though, so you can easily modify it if you need to use a special command to launch processes on other processors/machines. MIT Photonic Bands (MPB) is a free program to compute the band struc- tures (dispersion relations) and electromagnetic modes of periodic di- electric structures, and is applicable both to photonic crystals (pho- tonic band-gap materials) and a wide range of other optical problems. More information on MPB, including a detailed manual, can be found on- line at the MPB home page: http://ab-initio.mit.edu/mpb/ A typical invocation of mpb-split looks like: mpb-split num-split foo.ctl >& foo.out This causes mpb-split to process the control file foo.ctl, divide the k points into num-split equal chunks, run each list in a separate process with MPB, and redirect the output (in order) to foo.out. (One typi- cally redirects output to a file, as the output is verbose and contains a number of comma-delimited datasets that one can extract by grepping.) Overall, the behavior and arguments are the same as for mpb except that the first argument must be the integer num-split. What mpb-split technically does is to set the MPB variable k-split-num to num-split and k-split-index to the index (starting with 0) of the chunk for each process. If you want, you can use these variables to di- vide the problem in some other way and then reset them to 1 and 0, re- spectively. BUGS Send bug reports to S. G. Johnson, stevenj@alum.mit.edu. AUTHORS Written by Steven G. Johnson. Copyright (c) 1999-2012 by the Massachu- setts Institute of Technology. SEE ALSO mpb(1), mpb-data(1) MPB March 13, 2002 MPB(1)
NAME | SYNOPSIS | DESCRIPTION | BUGS | AUTHORS | SEE ALSO
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