-*- nroff -*-
Copyright © 2013-2018 Inria. All rights reserved.
See COPYING in top-level directory.
hwloc-diff - Compute differences between two XML topologies . **************************
Synopsis Section
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hwloc-diff [options] <input1.xml> <input2.xml>

hwloc-diff [options] <input1.xml> <input2.xml> <output.xml> . **************************
Options Section
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10 --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.

-h --help Display help message and exit. . **************************
Description Section
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. 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 directory. .

NOTE: If some application-specific userdata were been exported to the input XMLs, they will be ignored and discarded from the output because hwloc has no way to understand and compare them. .

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. . **************************
Examples Section
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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 - . **************************
Return value section
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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. . **************************
See also section
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. hwloc(7), lstopo(1), hwloc-patch(1), hwloc-compress-dir(1)