HWLOC-DIFF(1) hwloc HWLOC-DIFF(1)NAMEhwloc-diff - Compute differences between two XML topologies
SYNOPSIShwloc-diff [options] <input1.xml> <input2.xml>
hwloc-diff [options] <input1.xml> <input2.xml> <output.xml>
OPTIONS--refname <name>
Use <name> as the identifier for the reference topology in
the output XML difference. It is meant to tell which topol‐
ogy should be used when applying the resulting difference.
hwloc-patch may use that name to automatically load the rele‐
vant reference topology XML. By default, <input1.xml> is
used without its full path.
--version Report version and exit.
DESCRIPTIONhwloc-diff computes the difference between two XML topologies and
stores the result into <output.xml> if any, or dumps it to stdout oth‐
erwise.
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: 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
hwloc-diff's operation is best described through several examples.
Compute the difference between two XML topologies and output it to std‐
out:
$ 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
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 ALSOhwloc(7), lstopo(1), hwloc-patch(1), hwloc-compress-dir(1)1.11.1 Oct 15, 2015 HWLOC-DIFF(1)
