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hwloc-diff - Online in the Cloud

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This is the command hwloc-diff that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



hwloc-diff - Compute differences between two XML topologies


hwloc-diff [options] <input1.xml> <input2.xml>

hwloc-diff [options] <input1.xml> <input2.xml> <output.xml>


--refname <name>
Use <name> as the identifier for the reference topology in the output XML
difference. It is meant to tell which topology should be used when applying the
resulting difference. hwloc-patch may use that name to automatically load the
relevant reference topology XML. By default, <input1.xml> is used without its
full path.

--version Report version and exit.


hwloc-diff computes the difference between two XML topologies and stores the result into
<output.xml> if any, or dumps it to stdout otherwise.

The output difference may later be applied to another topology with hwloc-patch.

hwloc-compress-dir may be used for computing the diffs between all XML files in a

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-
diff utility.


hwloc-diff's operation is best described through several examples.

Compute the difference between two XML topologies and output it to stdout:

$ hwloc-diff fourmi023.xml fourmi024.xml
Found 11 differences, exporting to stdout
<?xml version="1.0" encoding="UTF-8"?>

Output the difference to file diff.xml instead:

$ hwloc-diff fourmi023.xml fourmi024.xml diff.xml
Found 11 differences, exporting to diff.xml

When the difference is too complex to be represented:

$ hwloc-diff fourmi023.xml avakas-frontend1.xml
Found 1 differences, including 1 too complex ones.
Cannot export differences to stdout

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

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


Upon successful execution, hwloc-diff outputs the difference. The return value is 0.

If the difference is too complex to be represented, an error is returned and the output is
not generated.

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

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