---
name: "amk_ccc-int32"
section: "1"
platform: "linux"
package: "scotch"
version: "7.0.7-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/amk_ccc"
---

# amk\_ccc-int32(1)

create target architectures

Part of [amk\_ccc(1)](/amk_ccc/1.md).

## NAME

**amk\_ccc, amk\_fft2, amk\_hy, amk\_m2, amk\_p2** - create target architectures

## SYNOPSIS

```
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 architectures.**

**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').**

## OPTIONS

- **-m*meth***

  **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).**

- **-h**

  **Display some help.**

- **-V**

  **Display program version and copyright.**

## EXAMPLE

**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.map
```

## SEE ALSO

**[acpl(1)](/acpl/1.md), [atst(1)](/atst/1.md), [amk\_grf(1)](/amk_grf/1.md), [dgmap(1)](/dgmap/1.md), [gmap(1)](/gmap/1.md).**

**Scotch user's manual.**

## AUTHOR

**Francois Pellegrini \<francois.pellegrini@labri.fr\>**