283 static void set_numa_interleave_memory_v2(numa_interleave_memory_v2_func_t func) { _numa_interleave_memory_v2 = func; } |
283 static void set_numa_interleave_memory_v2(numa_interleave_memory_v2_func_t func) { _numa_interleave_memory_v2 = func; } |
284 static void set_numa_set_bind_policy(numa_set_bind_policy_func_t func) { _numa_set_bind_policy = func; } |
284 static void set_numa_set_bind_policy(numa_set_bind_policy_func_t func) { _numa_set_bind_policy = func; } |
285 static void set_numa_bitmask_isbitset(numa_bitmask_isbitset_func_t func) { _numa_bitmask_isbitset = func; } |
285 static void set_numa_bitmask_isbitset(numa_bitmask_isbitset_func_t func) { _numa_bitmask_isbitset = func; } |
286 static void set_numa_distance(numa_distance_func_t func) { _numa_distance = func; } |
286 static void set_numa_distance(numa_distance_func_t func) { _numa_distance = func; } |
287 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } |
287 static void set_numa_all_nodes(unsigned long* ptr) { _numa_all_nodes = ptr; } |
288 static void set_numa_all_nodes_ptr(struct bitmask **ptr) { _numa_all_nodes_ptr = *ptr; } |
288 static void set_numa_all_nodes_ptr(struct bitmask **ptr) { _numa_all_nodes_ptr = (ptr == NULL ? NULL : *ptr); } |
289 static void set_numa_nodes_ptr(struct bitmask **ptr) { _numa_nodes_ptr = *ptr; } |
289 static void set_numa_nodes_ptr(struct bitmask **ptr) { _numa_nodes_ptr = (ptr == NULL ? NULL : *ptr); } |
290 static int sched_getcpu_syscall(void); |
290 static int sched_getcpu_syscall(void); |
291 public: |
291 public: |
292 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } |
292 static int sched_getcpu() { return _sched_getcpu != NULL ? _sched_getcpu() : -1; } |
293 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { |
293 static int numa_node_to_cpus(int node, unsigned long *buffer, int bufferlen) { |
294 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; |
294 return _numa_node_to_cpus != NULL ? _numa_node_to_cpus(node, buffer, bufferlen) : -1; |
328 } |
328 } |
329 // Check if numa node exists in the system (including zero memory nodes). |
329 // Check if numa node exists in the system (including zero memory nodes). |
330 static bool isnode_in_existing_nodes(unsigned int n) { |
330 static bool isnode_in_existing_nodes(unsigned int n) { |
331 if (_numa_bitmask_isbitset != NULL && _numa_nodes_ptr != NULL) { |
331 if (_numa_bitmask_isbitset != NULL && _numa_nodes_ptr != NULL) { |
332 return _numa_bitmask_isbitset(_numa_nodes_ptr, n); |
332 return _numa_bitmask_isbitset(_numa_nodes_ptr, n); |
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333 } else if (_numa_bitmask_isbitset != NULL && _numa_all_nodes_ptr != NULL) { |
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334 // Not all libnuma API v2 implement numa_nodes_ptr, so it's not possible |
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335 // to trust the API version for checking its absence. On the other hand, |
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336 // numa_nodes_ptr found in libnuma 2.0.9 and above is the only way to get |
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337 // a complete view of all numa nodes in the system, hence numa_nodes_ptr |
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338 // is used to handle CPU and nodes on architectures (like PowerPC) where |
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339 // there can exist nodes with CPUs but no memory or vice-versa and the |
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340 // nodes may be non-contiguous. For most of the architectures, like |
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341 // x86_64, numa_node_ptr presents the same node set as found in |
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342 // numa_all_nodes_ptr so it's possible to use numa_all_nodes_ptr as a |
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343 // substitute. |
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344 return _numa_bitmask_isbitset(_numa_all_nodes_ptr, n); |
333 } else |
345 } else |
334 return 0; |
346 return 0; |
335 } |
347 } |
336 }; |
348 }; |
337 |
349 |