hwlocality_linux_libnuma_bitmask

Section: Hardware Locality (hwloc) (3)
Updated: Thu Feb 11 2021
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NAME

hwlocality_linux_libnuma_bitmask - Interoperability with Linux libnuma bitmask

SYNOPSIS

Functions

static struct bitmask * hwloc_cpuset_to_linux_libnuma_bitmask (hwloc_topology_t topology, hwloc_const_cpuset_t cpuset)

static struct bitmask * hwloc_nodeset_to_linux_libnuma_bitmask (hwloc_topology_t topology, hwloc_const_nodeset_t nodeset)

static int hwloc_cpuset_from_linux_libnuma_bitmask (hwloc_topology_t topology, hwloc_cpuset_t cpuset, const struct bitmask *bitmask)

static int hwloc_nodeset_from_linux_libnuma_bitmask (hwloc_topology_t topology, hwloc_nodeset_t nodeset, const struct bitmask *bitmask)

Detailed Description

This interface helps converting between Linux libnuma bitmasks 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

static int hwloc_cpuset_from_linux_libnuma_bitmask (hwloc_topology_t topology, hwloc_cpuset_t cpuset, const struct bitmask * bitmask) [inline], [static]

Convert libnuma bitmask bitmask into hwloc CPU set cpuset. This function may be used after calling many numa_ functions that use a struct bitmask as an output parameter.

static struct bitmask * hwloc_cpuset_to_linux_libnuma_bitmask (hwloc_topology_t topology, hwloc_const_cpuset_t cpuset) [inline], [static]

Convert hwloc CPU set cpuset into the returned libnuma bitmask. The returned bitmask should later be freed with numa_bitmask_free.

This function may be used before calling many numa_ functions that use a struct bitmask as an input parameter.

Returns

: newly allocated struct bitmask.

static int hwloc_nodeset_from_linux_libnuma_bitmask (hwloc_topology_t topology, hwloc_nodeset_t nodeset, const struct bitmask * bitmask) [inline], [static]

Convert libnuma bitmask bitmask into hwloc NUMA node set nodeset. This function may be used after calling many numa_ functions that use a struct bitmask as an output parameter.

static struct bitmask * hwloc_nodeset_to_linux_libnuma_bitmask (hwloc_topology_t topology, hwloc_const_nodeset_t nodeset) [inline], [static]

Convert hwloc NUMA node set nodeset into the returned libnuma bitmask. The returned bitmask should later be freed with numa_bitmask_free.

This function may be used before calling many numa_ functions that use a struct bitmask as an input parameter.

Returns

: newly allocated struct bitmask.

Author

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