DOKK / manpages / debian 12 / scotch / amk_grf.1.en
amk_grf(1) Scotch user's manual amk_grf(1)

amk_grf - create target architecture from source graph 

amk_grf [options] [gfile] [tfile]

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.

Apply bipartitioning strategy strat to compute the recursive bipartition of the whole source graph into smaller target subdomains.
Display some help.
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.
Display program version and copyright.

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

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

Scotch user's manual.

Francois Pellegrini <francois.pellegrini@labri.fr>

02 September 2020