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

       gmtst - compute statistics on mappings

       gmtst [options] [gfile] [tfile] [mfile] [lfile]

       The gmtst program computes, in a	sequential way,	statistics on a	static
       mapping,	such as	load imbalance ratio, edge dilation distribution, etc.
       It  yields  the	same results as	the ones produced by the -vm option of
       the gmap(1) program.

       Source graph file gfile can only	be  a  centralized  graph  file.  File
       tfile  represents  the target architecture onto which gfile was mapped.
       If mapping file mfile was produced by gpart(1), the target architecture
       file  to	 provide  gmtst	should describe	a complete graph with the same
       number of vertices as the requested number of parts,  for  instance  by
       means  of  the  'cmplt num' algorithmically-described architecture. The
       resulting statistics are	stored in file lfile. When file	names are  not
       specified,  data	 is  read  from	standard input and written to standard
       output. Standard	streams	can also be explicitly represented by  a  dash

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

       -h     Display some help.

       -V     Display program version and copyright.

       Display statistics on mapping of graph	brol.grf  onto	target
       architecture brol.tgt:

	   $ gmtst brol.grf brol.tgt

       Display	statistics on partitioning of graph brol.grf into num
       parts. Note the use of the complete graph algorithmically-described ar-
       chitecture and of the shell pipe	command	to provide the complete	target
       architecture description	on the standard	input of the gmtst command:

	   $ echo "cmplt num" |	gmtst brol.grf -

       gmap(1),	gout(1), gtst(1).

       Scotch user's manual.

       Francois	Pellegrini <>

				August 03, 2010			      gmtst(1)


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