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Man Pages


Manual Reference Pages  -  HWLOC-PATCH (1)

NAME

hwloc-patch - Apply a topology difference to an existing XML topology

CONTENTS

Synopsis
Options
Description
Examples
Return Value
See Also

SYNOPSIS

hwloc-patch [options] [<topology.xml> | refname] [<diff.xml> | -] <output.xml>

hwloc-patch [options] [<topology.xml> | refname] [<diff.xml> | -]

OPTIONS

-R --reverse Reverse the sense the difference file.
--version Report version and exit.

DESCRIPTION

hwloc-patch loads the difference between two topologies from a XML file (or from the standard input) and applies it to an existing topology, generating a new, modified one.

The XML difference may have been computed earlier with hwloc-diff or hwloc-compress-dir.

If <output.xml> is given, the new, modified topology is stored in that new file. Otherwise, <topology.xml> is modified in place.

If refname is given instead of <topology.xml>, the input topology filename is automatically guessed by reading the refname field of the XML diff file. By default hwloc-diff generates XML diffs with the right reference topology filename (without any path prefix).

If - is given instead of <diff.xml>, the topology difference is read from the standard input.

NOTE: It is highly recommended that you read the hwloc(7) overview page before reading this man page. Most of the concepts described in hwloc(7) directly apply to the hwloc-patch utility.

EXAMPLES

hwloc-patch’s operation is best described through several examples.

Apply a XML topology difference file to an existing topology:

$ hwloc-patch fourmi023.xml diff.xml fourmi023-new.xml

Apply a XML topology difference file whole refname field contains the right input topology:

$ hwloc-patch refname diff.xml fourmi023-new.xml

Apply a XML topology from the standard intput:

$ cat diff.xml | hwloc-patch fourmi023.xml - fourmi023-new.xml

Directly compute the difference between two topologies and apply it to another one, in place:

$ hwloc-diff fourmi023.xml fourmi024.xml | hwloc-patch fourmi025.xml -

RETURN VALUE

Upon successful execution, hwloc-patch outputs the modified topology. The return value is 0.

hwloc-patch also returns nonzero if any kind of error occurs, such as (but not limited to) failure to parse the command line.

SEE ALSO

hwloc(7), lstopo(1), hwloc-diff(1), hwloc-compress-dir(1)

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1.11.1 HWLOC-PATCH (1) Oct 15, 2015

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