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amk_grf(1) Scotch user's manual amk_grf(1)

NAME

amk_grf - create target architecture from source graph

SYNOPSIS

amk_grf [options] [gfile] [tfile]

DESCRIPTION

The amk_grf program builds a decomposition-defined target architecture tfile from a source graph gfile.

Target architectures define the topology of the target graphs used by static mapping programs gmap(1) and dgmap(1). Target architectures can be either algorithmically-defined, for common, regular topologies, or decomposition-defined, such as the ones produced by amk_grf.

When the proper libraries have been included at compile time, amk_grf can directly handle compressed files, both as input and output. A stream is treated as compressed whenever its name is postfixed with a compressed file extension, such as in 'brol.tgt.bz2' or '-.gz'. The compression formats which can be supported are the bzip2 format ('.bz2'), the gzip format ('.gz'), and the lzma format ('.lzma').

Since decomposition-defined target architecture files have a size which is quadratic in the number of target vertices, because of the presence of a distance matrix structure, using compressed files to store them may save a lot of space.

OPTIONS

-b?strat
Apply bipartitioning strategy strat to compute the recursive bipartition of the whole source graph into smaller target subdomains.
-h
Display some help.
-l?lfile
Only keep vertices the indices of which belong to the space-separated list stored in lfile. This allows one to create target architectures which can even be disjoint subsets of a larger target architecture, modeled as a graph.
-V
Display program version and copyright.

EXAMPLE

Create a decomposition-defined target architecture from a 2D regular grid source graph of dimension 3 times 5, and save it, as a compiled target architecture, under the gzip(1) format, to file 'm3x5.tgt.gz'.

    $ gmk_m2 3 5 | amk_grf | acpl - m3x5.tgt.gz
Note that, in this precise case, it would be much preferable to use directly the 'mesh2D' algorithmically-defined target architecture.

    $ echo "mesh2D 3 5" > m3x5.tgt

SEE ALSO

acpl(1), amk_ccc(1), atst(1), dgmap(1), gmap(1), gmtst(1).

Scotch user's manual.

AUTHOR

Francois Pellegrini <francois.pellegrini@labri.fr>
02 September 2020