09-17-2015
What is your system? Some systems deal with swap in a different way.
I suspect you are on a true UNIX system like HPUX/Solaris/etc, these usually reserve swap space for memory, i.e. the more memory you use, the more swap you use, whether your system is actually using that swap space or not.
Linux on the other hand doesn't allocate swap at all unless you're running out of memory -- which doesn't agree with this graph at all.
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ACYCLIC(1) General Commands Manual ACYCLIC(1)
NAME
acyclic - make directed graph acyclic
SYNOPSIS
acyclic [ -nv? ] [ -o outfile ] [ file ]
DESCRIPTION
acyclic is a filter that takes a directed graph as input and outputs a copy of the graph with sufficient edges reversed to make the graph
acyclic. The reversed edge inherits all of the attributes of the original edge. The optional file argument specifies where the the input
graph is stored; by default, the program reads from stdin.
OPTIONS
The following options are supported:
-n No output is produced, though the return value will indicate whether the graph is acyclic or not.
-v Print information about whether the file is acyclic, has a cycle or is undirected.
-o outfile
causes the output to be written to the specified file; by default, output is written to stdout.
-? option causes the program to print usage information.
RETURN CODES
acyclic returns 0 if the graph is acyclic; 1 if the graph has a cycle; 2 if the graph is undirected; and 255 if there are any errors.
BUGS
If the graph is strict and there is a cycle of length 2, the attributes of the reversed edge are lost.
Some edge attributes are non-symmetric, referring to either the head or tail node. At present, there is no mechanism or convention for cor-
rectly switching or renaming these.
AUTHORS
Stephen C. North <north@research.att.com>
Emden R. Gansner <erg@research.att.com>
SEE ALSO
gc(1), dot(1), gvpr(1), gvcolor(1), ccomps(1), sccmap(1), tred(1), libgraph(3)
21 March 2001 ACYCLIC(1)