NAME

       Modifying a loaded Topology -

   Enumerations
       enum hwloc_restrict_flags_e { HWLOC_RESTRICT_FLAG_ADAPT_DISTANCES,
           HWLOC_RESTRICT_FLAG_ADAPT_MISC, HWLOC_RESTRICT_FLAG_ADAPT_IO }

   Functions
        hwloc_obj_t hwloc_topology_insert_misc_object_by_cpuset (hwloc_topology_t topology,
           hwloc_const_cpuset_t cpuset, const char *name)
        hwloc_obj_t hwloc_topology_insert_misc_object_by_parent (hwloc_topology_t topology,
           hwloc_obj_t parent, const char *name)
        int hwloc_topology_restrict (hwloc_topology_t restrict topology, hwloc_const_cpuset_t
           cpuset, unsigned long flags)
        int hwloc_topology_dup (hwloc_topology_t *newtopology, hwloc_topology_t oldtopology)

Detailed Description

Enumeration Type Documentation

   enum hwloc_restrict_flags_e
       Flags to be given to hwloc_topology_restrict().

       Enumerator

       HWLOC_RESTRICT_FLAG_ADAPT_DISTANCES
              Adapt distance matrices according to objects being removed during restriction. If
              this flag is not set, distance matrices are removed.

       HWLOC_RESTRICT_FLAG_ADAPT_MISC
              Move Misc objects to ancestors if their parents are removed during restriction. If
              this flag is not set, Misc objects are removed when their parents are removed.

       HWLOC_RESTRICT_FLAG_ADAPT_IO
              Move I/O objects to ancestors if their parents are removed during restriction. If
              this flag is not set, I/O devices and bridges are removed when their parents are
              removed.

Function Documentation

    int hwloc_topology_dup (hwloc_topology_t *newtopology, hwloc_topology_toldtopology)
       Duplicate a topology. The entire topology structure as well as its objects are duplicated
       into a new one.

       This is useful for keeping a backup while modifying a topology.

    hwloc_obj_t hwloc_topology_insert_misc_object_by_cpuset (hwloc_topology_ttopology,
       hwloc_const_cpuset_tcpuset, const char *name)
       Add a MISC object to the topology. A new MISC object will be created and inserted into the
       topology at the position given by bitmap cpuset. This offers a way to add new intermediate
       levels to the topology hierarchy.

       cpuset and name will be copied to setup the new object attributes.

       Returns:
           the newly-created object.

           NULL if the insertion conflicts with the existing topology tree.

       Note:
           If name contains some non-printable characters, they will be dropped when exporting to
           XML, see hwloc_topology_export_xml().

    hwloc_obj_t hwloc_topology_insert_misc_object_by_parent (hwloc_topology_ttopology,
       hwloc_obj_tparent, const char *name)
       Add a MISC object as a leaf of the topology. A new MISC object will be created and
       inserted into the topology at the position given by parent. It is appended to the list of
       existing children, without ever adding any intermediate hierarchy level. This is useful
       for annotating the topology without actually changing the hierarchy.

       name will be copied to the setup the new object attributes. However, the new leaf object
       will not have any cpuset.

       Returns:
           the newly-created object

       Note:
           If name contains some non-printable characters, they will be dropped when exporting to
           XML, see hwloc_topology_export_xml().

    int hwloc_topology_restrict (hwloc_topology_t restricttopology, hwloc_const_cpuset_tcpuset,
       unsigned longflags)
       Restrict the topology to the given CPU set. Topology topology is modified so as to remove
       all objects that are not included (or partially included) in the CPU set cpuset. All
       objects CPU and node sets are restricted accordingly.

       flags is a OR'ed set of hwloc_restrict_flags_e.

       Note:
           This call may not be reverted by restricting back to a larger cpuset. Once dropped
           during restriction, objects may not be brought back, except by loading another
           topology with hwloc_topology_load().

       Returns:
           0 on success.

           -1 with errno set to EINVAL if the input cpuset is invalid. The topology is not
           modified in this case.

           -1 with errno set to ENOMEM on failure to allocate internal data. The topology is
           reinitialized in this case. It should be either destroyed with
           hwloc_topology_destroy() or configured and loaded again.

Author

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