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Interoperability with Linux libnuma bitmask(3) | Hardware Locality (hwloc) | Interoperability with Linux libnuma bitmask(3) |
NAME¶
Interoperability with Linux libnuma bitmask -Functions¶
static struct bitmask * hwloc_cpuset_to_linux_libnuma_bitmask (hwloc_topology_t topology, hwloc_const_cpuset_t cpuset)
Detailed Description¶
This interface helps converting between Linux libnuma bitmasks and hwloc cpusets and nodesets. It also offers a consistent behavior on non-NUMA machines or non-NUMA-aware kernels by assuming that the machines have a single NUMA node. 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_ttopology, hwloc_cpuset_tcpuset, 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_ttopology, hwloc_const_cpuset_tcpuset) [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_ttopology, hwloc_nodeset_tnodeset, 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_ttopology, hwloc_const_nodeset_tnodeset) [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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