NAME

       hwlocality_linux_libnuma_ulongs - Interoperability with Linux libnuma unsigned long masks

SYNOPSIS

   Functions
       int hwloc_cpuset_to_linux_libnuma_ulongs (hwloc_topology_t topology, hwloc_const_cpuset_t cpuset,
           unsigned long *mask, unsigned long *maxnode)
       int hwloc_nodeset_to_linux_libnuma_ulongs (hwloc_topology_t topology, hwloc_const_nodeset_t nodeset,
           unsigned long *mask, unsigned long *maxnode)
       int hwloc_cpuset_from_linux_libnuma_ulongs (hwloc_topology_t topology, hwloc_cpuset_t cpuset, const
           unsigned long *mask, unsigned long maxnode)
       int hwloc_nodeset_from_linux_libnuma_ulongs (hwloc_topology_t topology, hwloc_nodeset_t nodeset, const
           unsigned long *mask, unsigned long maxnode)

Detailed Description

       This interface helps converting between Linux libnuma unsigned long masks and hwloc cpusets and nodesets.

       Note
           Topology topology must match the current machine.

           The behavior of libnuma is undefined if the kernel is not NUMA-aware. (when CONFIG_NUMA is not set in
           the kernel configuration). This helper and libnuma may thus not be strictly compatible in this case,
           which may be detected by checking whether numa_available() returns -1.

Function Documentation

   int hwloc_cpuset_from_linux_libnuma_ulongs (hwloc_topology_t topology, hwloc_cpuset_t cpuset, const unsigned
       long * mask, unsigned long maxnode) [inline]
       Convert the array of unsigned long mask into hwloc CPU set. mask is a array of unsigned long that will be
       read. maxnode contains the maximal node number that may be read in mask.

       This function may be used after calling get_mempolicy or any other function that takes an array of
       unsigned long as output parameter (and possibly a maximal node number as input parameter).

       Returns
           0 on success.

           -1 on error, for instance if failing an internal reallocation.

   int hwloc_cpuset_to_linux_libnuma_ulongs (hwloc_topology_t topology, hwloc_const_cpuset_t cpuset, unsigned
       long * mask, unsigned long * maxnode) [inline]
       Convert hwloc CPU set cpuset into the array of unsigned long mask. mask is the array of unsigned long
       that will be filled. maxnode contains the maximal node number that may be stored in mask. maxnode will be
       set to the maximal node number that was found, plus one.

       This function may be used before calling set_mempolicy, mbind, migrate_pages or any other function that
       takes an array of unsigned long and a maximal node number as input parameter.

       Returns
           0.

   int hwloc_nodeset_from_linux_libnuma_ulongs (hwloc_topology_t topology, hwloc_nodeset_t nodeset, const
       unsigned long * mask, unsigned long maxnode) [inline]
       Convert the array of unsigned long mask into hwloc NUMA node set. mask is a array of unsigned long that
       will be read. maxnode contains the maximal node number that may be read in mask.

       This function may be used after calling get_mempolicy or any other function that takes an array of
       unsigned long as output parameter (and possibly a maximal node number as input parameter).

       Returns
           0 on success.

           -1 with errno set to ENOMEM if some internal reallocation failed.

   int hwloc_nodeset_to_linux_libnuma_ulongs (hwloc_topology_t topology, hwloc_const_nodeset_t nodeset, unsigned
       long * mask, unsigned long * maxnode) [inline]
       Convert hwloc NUMA node set nodeset into the array of unsigned long mask. mask is the array of unsigned
       long that will be filled. maxnode contains the maximal node number that may be stored in mask. maxnode
       will be set to the maximal node number that was found, plus one.

       This function may be used before calling set_mempolicy, mbind, migrate_pages or any other function that
       takes an array of unsigned long and a maximal node number as input parameter.

       Returns
           0.

Author

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Hardware Locality (hwloc)                        Version 2.12.0               hwlocality_linux_libnuma_ulongs(3)