# atst(1) [debian man page]

atst(1) Scotch user's manual atst(1)NAME

atst - test the consistency of target architecturesSYNOPSIS

atst [options] [afile] [lfile]DESCRIPTION

The atst program checks the consistency of a Scotch decomposition-defined target architecture and, in case of success, outputs some statis- tics regarding the number of target vertices and the length of paths linking them. Target architectures define the topology of the target graphs used by static mapping programs gmap(1) and dgmap(1). The resulting statistics are stored in file lfile. When file names are not specified, data is read from standard input and written to stan- dard output. Standard streams can also be explicitly represented by a dash '-'. When the proper libraries have been included at compile time, atst 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 compres- sion formats which can be supported are the bzip2 format ('.bz2'), the gzip format ('.gz'), and the lzma format ('.lzma', on input only).OPTIONS

Display some help.-hDisplay program version and copyright.-VEXAMPLE

Test the consistency of architecture arch.tgt: $ atst arch.tgtSEE ALSO

acpl(1), amk_ccc(1), amk_grf(1), dgmap(1), gmap(1), gmtst(1). Scotch user's manual.AUTHOR

Francois Pellegrini <francois.pellegrini@labri.fr> February 14, 2011 atst(1)

## Check Out this Related Man Page

amk_ccc(1) Scotch user's manual amk_ccc(1)NAME

amk_ccc, amk_fft2, amk_hy, amk_m2, amk_p2 - create target architecturesSYNOPSIS

amk_ccc [options] dim [tfile] amk_fft2 [options] dim [tfile] amk_hy [options] dim [tfile] amk_m2 [options] dimX [dimY] [tfile] amk_p2 [options] [wght0] [wght1] [tfile]DESCRIPTION

The amk_* programs create target architecture files for some common, regular topologies. amk_ccc creates a decomposition-defined cube-connected-cycle topology of dimension dim. The decomposition is performed first by bisection along the dimensions of the hypercube, then along the remaining cycle graphs. amk_fft2 creates a decomposition-defined fast-Fourier-transform topology of dimension dim. The decomposition is performed by recursive bisection of the vertices, by descending dimension (that is, bit number in the labeling of the vertices). amk_hy creates a decomposition-defined hypercube topology of dimension dim. The decomposition is performed by recursive bisection of the vertices, by descending dimension (that is, bit number in the labeling of the vertices). Save for experimentation purposes, this program is deprecated, as the algorithmically-defined 'hcub' target architecture is a more convenient and efficient way to represent hypercube archi- tectures. amk_m2 creates a decomposition-defined 2D regular grid topology of dimensions dimX and dimY. The decomposition is performed by recursive splitting along the dimensions, either by cutting the longest one, or by one-way dissection, depending on the '-m' option flag. Save for experimentation purposes, this program is deprecated, as the algorithmically-defined 'mesh2D' and 'mesh3D' target architectures are a more convenient and efficient way to represent 2D and 3D grid architectures. amk_p2 creates a weighted path graph topology comprising only two vertices of weights wght0 and wght1. This is just a helper program, which builds a 'wcmplt' algorithmically-defined complete graph with two vertices. It may be used to compute weighted bisections of a graph. When the proper libraries have been included at compile time, the amk_* programs 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 input only).OPTIONS

For amk_m2 only. Perform either recursive dissection or one-way dissection, according to the given method flag: n perform nested dissection (default). o perform one-way dissection (cut across Y, then X).-mmethDisplay some help.-hDisplay program version and copyright.-VEXAMPLE

Create a cube-connected-cycle target architecture of dimension 4, and save it to file 'ccc4.tgt'. $ amk_ccc 4 ccc4.tgt Run gmap to compute a bisection, into two parts of respective weights 3 and 5, 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. $ amk_p2 3 5 | gmap brol.grf - brol.mapSEE ALSO

acpl(1), atst(1), amk_grf(1), dgmap(1), gmap(1). Scotch user's manual.AUTHOR

Francois Pellegrini <francois.pellegrini@labri.fr> February 14, 2011 amk_ccc(1)