43 lines
981 B
C
43 lines
981 B
C
/*-------------------------------------------------------------------------
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*
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* pg_numa.h
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* Basic NUMA portability routines
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*
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*
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* Copyright (c) 2025, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* src/include/port/pg_numa.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PG_NUMA_H
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#define PG_NUMA_H
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extern PGDLLIMPORT int pg_numa_init(void);
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extern PGDLLIMPORT int pg_numa_query_pages(int pid, unsigned long count, void **pages, int *status);
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extern PGDLLIMPORT int pg_numa_get_max_node(void);
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#ifdef USE_LIBNUMA
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/*
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* This is required on Linux, before pg_numa_query_pages() as we
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* need to page-fault before move_pages(2) syscall returns valid results.
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*/
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static inline void
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pg_numa_touch_mem_if_required(void *ptr)
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{
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volatile uint64 touch pg_attribute_unused();
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touch = *(volatile uint64 *) ptr;
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}
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#else
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#define pg_numa_touch_mem_if_required(ptr) \
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do {} while(0)
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#endif
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#endif /* PG_NUMA_H */
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