Package org.lwjgl.util.hwloc

@NullMarked package org.lwjgl.util.hwloc

Contains bindings to the hwloc, a portable abstraction (across OS, versions, architectures, ...) of the hierarchical topology of modern architectures, including NUMA memory nodes, sockets, shared caches, cores and simultaneous multithreading.

It also gathers various system attributes such as cache and memory information as well as the locality of I/O devices such as network interfaces, InfiniBand HCAs or GPUs.

hwloc primarily aims at helping applications with gathering information about increasingly complex parallel computing platforms so as to exploit them accordingly and efficiently. For instance, two tasks that tightly cooperate should probably be placed onto cores sharing a cache. However, two independent memory-intensive tasks should better be spread out onto different sockets so as to maximize their memory throughput.

hwloc may also help many applications just by providing a portable CPU and memory binding API and a reliable way to find out how many cores and/or hardware threads are available.

Resources

• Documentation
• Source Repository

Class	Description
HWLoc
hwloc_bridge_attr_s	struct hwloc_bridge_attr_s { union { hwloc_pcidev_attr_s pci; } upstream; hwloc_obj_bridge_type_t upstream_type; union { struct { unsigned int domain; unsigned char secondary_bus; unsigned char subordinate_bus; } pci; } downstream; hwloc_obj_bridge_type_t downstream_type; unsigned depth; }
hwloc_bridge_attr_s.Buffer	An array of hwloc_bridge_attr_s structs.
hwloc_cache_attr_s	struct hwloc_cache_attr_s { hwloc_uint64_t size; unsigned depth; unsigned linesize; int associativity; hwloc_obj_cache_type_t type; }
hwloc_cache_attr_s.Buffer	An array of hwloc_cache_attr_s structs.
hwloc_distances_s	struct hwloc_distances_s { unsigned int nbobjs; hwloc_obj_t * objs; unsigned long kind; hwloc_uint64_t * values; }
hwloc_distances_s.Buffer	An array of hwloc_distances_s structs.
hwloc_group_attr_s	struct hwloc_group_attr_s { unsigned depth; unsigned kind; unsigned subkind; unsigned char dont_merge; }
hwloc_group_attr_s.Buffer	An array of hwloc_group_attr_s structs.
hwloc_info_s	struct hwloc_info_s { char * name; char * value; }
hwloc_info_s.Buffer	An array of hwloc_info_s structs.
hwloc_infos_s	struct hwloc_infos_s { struct hwloc_info_s * array; unsigned count; unsigned allocated; }
hwloc_infos_s.Buffer	An array of hwloc_infos_s structs.
hwloc_location	struct hwloc_location { enum hwloc_location_type_e type; hwloc_location_u location; }
hwloc_location_u	union hwloc_location_u { hwloc_cpuset_t cpuset; hwloc_obj_t object; }
hwloc_location_u.Buffer	An array of hwloc_location_u structs.
hwloc_location.Buffer	An array of hwloc_location structs.
hwloc_memory_page_type_s	struct hwloc_memory_page_type_s { hwloc_uint64_t size; hwloc_uint64_t count; }
hwloc_memory_page_type_s.Buffer	An array of hwloc_memory_page_type_s structs.
hwloc_numanode_attr_s	struct hwloc_numanode_attr_s { hwloc_uint64_t local_memory; unsigned page_types_len; hwloc_memory_page_type_s * page_types; }
hwloc_numanode_attr_s.Buffer	An array of hwloc_numanode_attr_s structs.
hwloc_obj	struct hwloc_obj { hwloc_obj_type_t type; char * subtype; unsigned os_index; char * name; hwloc_uint64_t total_memory; struct hwloc_obj_attr_u * attr; int depth; unsigned logical_index; struct hwloc_obj * next_cousin; struct hwloc_obj * prev_cousin; struct hwloc_obj * parent; unsigned sibling_rank; struct hwloc_obj * next_sibling; struct hwloc_obj * prev_sibling; unsigned arity; struct hwloc_obj ** children; struct hwloc_obj * first_child; struct hwloc_obj * last_child; int symmetric_subtree; unsigned memory_arity; struct hwloc_obj * memory_first_child; unsigned io_arity; struct hwloc_obj * io_first_child; unsigned misc_arity; struct hwloc_obj * misc_first_child; hwloc_cpuset_t cpuset; hwloc_cpuset_t complete_cpuset; hwloc_nodeset_t nodeset; hwloc_nodeset_t complete_nodeset; struct hwloc_infos_s infos; void * userdata; hwloc_uint64_t gp_index; }
hwloc_obj_attr_u	union struct hwloc_obj_attr_u { hwloc_numanode_attr_s numanode; hwloc_cache_attr_s cache; hwloc_group_attr_s group; hwloc_pcidev_attr_s pcidev; hwloc_bridge_attr_s bridge; hwloc_osdev_attr_s osdev; }
hwloc_obj_attr_u.Buffer	An array of hwloc_obj_attr_u structs.
hwloc_obj.Buffer	An array of hwloc_obj structs.
hwloc_osdev_attr_s	struct hwloc_osdev_attr_s { hwloc_obj_osdev_types_t types; }
hwloc_osdev_attr_s.Buffer	An array of hwloc_osdev_attr_s structs.
hwloc_pcidev_attr_s	struct hwloc_pcidev_attr_s { unsigned int domain; unsigned char bus; unsigned char dev; unsigned char func; unsigned char prog_if; unsigned short class_id; unsigned short vendor_id; unsigned short device_id; unsigned short subvendor_id; unsigned short subdevice_id; unsigned char revision; float linkspeed; }
hwloc_pcidev_attr_s.Buffer	An array of hwloc_pcidev_attr_s structs.
hwloc_topology_cpubind_support	struct hwloc_topology_cpubind_support { unsigned char set_thisproc_cpubind; unsigned char get_thisproc_cpubind; unsigned char set_proc_cpubind; unsigned char get_proc_cpubind; unsigned char set_thisthread_cpubind; unsigned char get_thisthread_cpubind; unsigned char set_thread_cpubind; unsigned char get_thread_cpubind; unsigned char get_thisproc_last_cpu_location; unsigned char get_proc_last_cpu_location; unsigned char get_thisthread_last_cpu_location; }
hwloc_topology_cpubind_support.Buffer	An array of hwloc_topology_cpubind_support structs.
hwloc_topology_diff_generic_s	struct hwloc_topology_diff_generic_s { hwloc_topology_diff_type_t type; hwloc_topology_diff_u * next; }
hwloc_topology_diff_generic_s.Buffer	An array of hwloc_topology_diff_generic_s structs.
hwloc_topology_diff_obj_attr_generic_s	struct hwloc_topology_diff_obj_attr_generic_s { hwloc_topology_diff_obj_attr_type_t type; }
hwloc_topology_diff_obj_attr_generic_s.Buffer	An array of hwloc_topology_diff_obj_attr_generic_s structs.
hwloc_topology_diff_obj_attr_s	struct hwloc_topology_diff_obj_attr_s { hwloc_topology_diff_type_t type; struct hwloc_topology_diff_u * next; int obj_depth; unsigned int obj_index; struct hwloc_topology_diff_obj_attr_u diff; }
hwloc_topology_diff_obj_attr_s.Buffer	An array of hwloc_topology_diff_obj_attr_s structs.
hwloc_topology_diff_obj_attr_string_s	struct hwloc_topology_diff_obj_attr_string_s { hwloc_topology_diff_obj_attr_type_t type; char * name; char * oldvalue; char * newvalue; }
hwloc_topology_diff_obj_attr_string_s.Buffer	An array of hwloc_topology_diff_obj_attr_string_s structs.
hwloc_topology_diff_obj_attr_u	union struct hwloc_topology_diff_obj_attr_u { hwloc_topology_diff_obj_attr_generic_s generic; hwloc_topology_diff_obj_attr_uint64_s uint64; hwloc_topology_diff_obj_attr_string_s string; }
hwloc_topology_diff_obj_attr_u.Buffer	An array of hwloc_topology_diff_obj_attr_u structs.
hwloc_topology_diff_obj_attr_uint64_s	struct hwloc_topology_diff_obj_attr_uint64_s { hwloc_topology_diff_obj_attr_type_t type; hwloc_uint64_t index; hwloc_uint64_t oldvalue; hwloc_uint64_t newvalue; }
hwloc_topology_diff_obj_attr_uint64_s.Buffer	An array of hwloc_topology_diff_obj_attr_uint64_s structs.
hwloc_topology_diff_too_complex_s	struct hwloc_topology_diff_too_complex_s { hwloc_topology_diff_type_t type; struct hwloc_topology_diff_u * next; int obj_depth; unsigned int obj_index; }
hwloc_topology_diff_too_complex_s.Buffer	An array of hwloc_topology_diff_too_complex_s structs.
hwloc_topology_diff_u	union struct hwloc_topology_diff_u { hwloc_topology_diff_generic_s generic; hwloc_topology_diff_obj_attr_s obj_attr; hwloc_topology_diff_too_complex_s too_complex; }
hwloc_topology_diff_u.Buffer	An array of hwloc_topology_diff_u structs.
hwloc_topology_discovery_support	struct hwloc_topology_discovery_support { unsigned char pu; unsigned char numa; unsigned char numa_memory; unsigned char disallowed_pu; unsigned char disallowed_numa; unsigned char cpukind_efficiency; }
hwloc_topology_discovery_support.Buffer	An array of hwloc_topology_discovery_support structs.
hwloc_topology_membind_support	struct hwloc_topology_membind_support { unsigned char set_thisproc_membind; unsigned char get_thisproc_membind; unsigned char set_proc_membind; unsigned char get_proc_membind; unsigned char set_thisthread_membind; unsigned char get_thisthread_membind; unsigned char alloc_membind; unsigned char set_area_membind; unsigned char get_area_membind; unsigned char get_area_memlocation; unsigned char firsttouch_membind; unsigned char bind_membind; unsigned char interleave_membind; unsigned char weighted_interleave_membind; unsigned char nexttouch_membind; unsigned char migrate_membind; }
hwloc_topology_membind_support.Buffer	An array of hwloc_topology_membind_support structs.
hwloc_topology_misc_support	struct hwloc_topology_misc_support { unsigned char imported_support; }
hwloc_topology_misc_support.Buffer	An array of hwloc_topology_misc_support structs.
hwloc_topology_support	struct hwloc_topology_support { struct hwloc_topology_discovery_support * discovery; struct hwloc_topology_cpubind_support * cpubind; struct hwloc_topology_membind_support * membind; struct hwloc_topology_misc_support * misc; }
hwloc_topology_support.Buffer	An array of hwloc_topology_support structs.
HWLoc.Functions	Contains the function pointers loaded from the HWLOC SharedLibrary.
HWLocLinux
HWLocLinux.Functions	Contains the function pointers loaded from HWLoc.getLibrary().
HWLocShMem
HWLocShMem.Functions	Contains the function pointers loaded from HWLoc.getLibrary().
HWLocWindows
HWLocWindows.Functions	Contains the function pointers loaded from HWLoc.getLibrary().
topology_set_userdata_export_callback	Callback function: (* anonymous)
topology_set_userdata_export_callbackI	Callback function: (* anonymous)
topology_set_userdata_import_callback	Callback function: (* anonymous)
topology_set_userdata_import_callbackI	Callback function: (* anonymous)