2 +----------------------------------------------------------------------+
4 +----------------------------------------------------------------------+
5 | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com) |
6 +----------------------------------------------------------------------+
7 | This source file is subject to version 3.01 of the PHP license, |
8 | that is bundled with this package in the file LICENSE, and is |
9 | available through the world-wide-web at the following url: |
10 | http://www.php.net/license/3_01.txt |
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14 +----------------------------------------------------------------------+
16 #ifndef incl_HPHP_UTIL_NUMA_H
17 #define incl_HPHP_UTIL_NUMA_H
30 extern uint32_t numa_node_set
;
31 extern uint32_t numa_node_mask
;
32 extern uint32_t numa_num_nodes
;
33 extern std::vector
<bitmask
*> node_to_cpu_mask
;
39 * Determine the next NUMA node according to state maintained in `curr_node`.
41 int next_numa_node(std::atomic_int
& curr_node
);
43 * The number of numa nodes in the system
45 inline int num_numa_nodes() {
46 return use_numa
? numa_num_nodes
: 1;
49 * Enable numa interleaving for the specified address range
51 void numa_interleave(void* start
, size_t size
);
53 * Allocate the specified address range on the given node
55 void numa_bind_to(void* start
, size_t size
, int node
);
57 * Return true if node is part of the allowed set of numa nodes
59 inline bool numa_node_allowed(int node
) {
60 if (numa_node_set
== 0) return true;
61 return numa_node_set
& (1u << node
);
66 #else // HAVE_NUMA undefined
69 inline void initNuma() {}
70 inline constexpr int next_numa_node(std::atomic_int
& curr_node
) { return 0; }
71 inline constexpr int num_numa_nodes() { return 1; }
72 inline void numa_interleave(void* start
, size_t size
) {}
73 inline void numa_bind_to(void* start
, size_t size
, int node
) {}
74 inline constexpr bool numa_node_allowed(int node
) { return true; }