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pg_numa.h
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1/*-------------------------------------------------------------------------
2 *
3 * pg_numa.h
4 * Basic NUMA portability routines
5 *
6 *
7 * Copyright (c) 2025, PostgreSQL Global Development Group
8 *
9 * IDENTIFICATION
10 * src/include/port/pg_numa.h
11 *
12 *-------------------------------------------------------------------------
13 */
14#ifndef PG_NUMA_H
15#define PG_NUMA_H
16
17extern PGDLLIMPORT int pg_numa_init(void);
18extern PGDLLIMPORT int pg_numa_query_pages(int pid, unsigned long count, void **pages, int *status);
19extern PGDLLIMPORT int pg_numa_get_max_node(void);
20
21#ifdef USE_LIBNUMA
22
23/*
24 * This is required on Linux, before pg_numa_query_pages() as we
25 * need to page-fault before move_pages(2) syscall returns valid results.
26 */
27#define pg_numa_touch_mem_if_required(ro_volatile_var, ptr) \
28 ro_volatile_var = *(volatile uint64 *) ptr
29
30#else
31
32#define pg_numa_touch_mem_if_required(ro_volatile_var, ptr) \
33 do {} while(0)
34
35#endif
36
37#endif /* PG_NUMA_H */
PGDLLIMPORT
#define PGDLLIMPORT
Definition: c.h:1291
pg_numa_get_max_node
PGDLLIMPORT int pg_numa_get_max_node(void)
Definition: pg_numa.c:75
pg_numa_query_pages
PGDLLIMPORT int pg_numa_query_pages(int pid, unsigned long count, void **pages, int *status)
Definition: pg_numa.c:69
pg_numa_init
PGDLLIMPORT int pg_numa_init(void)
Definition: pg_numa.c:62