

bval Set maximum load imbalance ratio for graph partitioning or static mapping. When programs are used as clustering tools, this parameter sets the maximum load imbalance ratio for recursive bipartitions. Exclusive with the m option.  
copt
Choose default mapping strategy according to one or
several options among:
 
h Display some help.  
mstrat Use sequential mapping strategy strat (see Scotch user’s manual for more information).  
q (for gpart)  
qpwght (for gmap) Use the programs as graph clustering tools instead of static mapping or graph partitioning tools. For gpart, the number of parts will become the maximum cluster weight. For gmap, this number pwght has to be passed after the option.  
V Display program version and copyright.  
vverb
Set verbose mode to verb. It is a set of one of more
characters which can be:
 
Target architectures represent graphs onto which source graphs are mapped. In order to speedup the obtainment of target architecture topological properties during the computation of mappings, some classical topologies are algorithmically coded into the mapper itself. These topologies are consequently simply defined by their code name, followed by their dimensional parameters:Other target topologies can be created from their source graph description by using the amk_grf(1) command. In this case, the target description will begin with the code name deco.
cmplt dim unweighted complete graph of size dim. cmpltw dim w0 w1 ... wdim1 weighted complete graph of size size and of respective loads w0, w1, ..., wdim1. hcub dim hypercube of dimension dim. leaf hgt n0 w0 ... nhgt1 whgt1 treeleaf graph of height hgt with (n0 times n1 times ... nhgt1) vertices, with intercluster link weights of w0, w1, ... whgt1. mesh2D dimX dimY 2D mesh of dimX times dimY nodes. mesh3D dimX dimY dimZ 23 mesh of dimX times dimY times dimZ nodes. torus2D dimX dimY 2D torus of dimX times dimY nodes. torus3D dimX dimY dimZ 3D torus of dimX times dimY times dimZ nodes.
Mappings are represented by as many lines as there are vertices in the source graph. Each of these lines is made of two figures: the number of the vertex (or its label if source graph vertices are labeled) and the index of the target vertex to which it has been assigned. Target vertex indices range from 0 to the number of vertices in the target architecture (that is, the number of parts) minus one.This block of lines is always preceded by the number of such lines. In most cases, since full mappings are requested, the number of lines is equal to the number of vertices in the source graph.
Run gpart to compute a partition into 7 parts of graph ’brol.grf’ and save the resulting ordering to file ’brol.map’.
$ gpart 7 brol.grf brol.mapRun gmap to compute a partition, into 3 parts of respective weights 1, 2 and 4, of graph ’brol.grf’ and save the resulting mapping to file ’brol.map’. The dash ’’ standard file name is used so that the target architecture description is read from the standard input, through the pipe, as provided by the ’echo’ shell command.
$ echo "cmpltw 3 1 2 4"  gmap brol.grf  brol.map
amk_grf(1), acpl(1), gmtst(1), dgmap(1).Scotch user’s manual.
Francois Pellegrini <francois.pellegrini@labri.fr>
GMAP (1)  September 01, 2011 
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Output converted with manServer 1.07.