Section: Scotch user's manual (1)Updated: August 03, 2010Local indexUp
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', on
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.