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Portable Hardware Locality (hwloc) Documentation: v1.7

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Binding Helpers

Functions

static inline void hwloc_distributev (hwloc_topology_t topology, hwloc_obj_t *root, unsigned n_roots, hwloc_cpuset_t *cpuset, unsigned n, unsigned until)
 
static inline void hwloc_distribute (hwloc_topology_t topology, hwloc_obj_t root, hwloc_cpuset_t *cpuset, unsigned n, unsigned until)
 
static inline void * hwloc_alloc_membind_policy_nodeset (hwloc_topology_t topology, size_t len, hwloc_const_nodeset_t nodeset, hwloc_membind_policy_t policy, int flags)
 
static inline void * hwloc_alloc_membind_policy (hwloc_topology_t topology, size_t len, hwloc_const_cpuset_t cpuset, hwloc_membind_policy_t policy, int flags)
 

Detailed Description

Function Documentation

static inline void* hwloc_alloc_membind_policy ( hwloc_topology_t  topology,
size_t  len,
hwloc_const_cpuset_t  cpuset,
hwloc_membind_policy_t  policy,
int  flags 
)
static

Allocate some memory on the memory nodes near given cpuset cpuset.

This is similar to hwloc_alloc_membind_policy_nodeset, but for a given cpuset.

static inline void* hwloc_alloc_membind_policy_nodeset ( hwloc_topology_t  topology,
size_t  len,
hwloc_const_nodeset_t  nodeset,
hwloc_membind_policy_t  policy,
int  flags 
)
static

Allocate some memory on the given nodeset nodeset.

This is similar to hwloc_alloc_membind except that it is allowed to change the current memory binding policy, thus providing more binding support, at the expense of changing the current state.

static inline void hwloc_distribute ( hwloc_topology_t  topology,
hwloc_obj_t  root,
hwloc_cpuset_t cpuset,
unsigned  n,
unsigned  until 
)
static
static inline void hwloc_distributev ( hwloc_topology_t  topology,
hwloc_obj_t roots,
unsigned  n_roots,
hwloc_cpuset_t cpuset,
unsigned  n,
unsigned  until 
)
static

Distribute n items over the topology under root.

Distribute n items over the topology under roots.

Array cpuset will be filled with n cpusets recursively distributed linearly over the topology under root, down to depth until (which can be INT_MAX to distribute down to the finest level).

This is typically useful when an application wants to distribute n threads over a machine, giving each of them as much private cache as possible and keeping them locally in number order.

The caller may typically want to also call hwloc_bitmap_singlify() before binding a thread so that it does not move at all.

Note
This function requires the root object to have a CPU set.

This is the same as hwloc_distribute, but takes an array of roots instead of just one root.

Note
This function requires the roots objects to have a CPU set.