#ifndef JEMALLOC_INTERNAL_BASE_TYPES_H
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#define JEMALLOC_INTERNAL_BASE_TYPES_H
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typedef struct base_block_s base_block_t;
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typedef struct base_s base_t;
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#define METADATA_THP_DEFAULT metadata_thp_disabled
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/*
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* In auto mode, arenas switch to huge pages for the base allocator on the
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* second base block. a0 switches to thp on the 5th block (after 20 megabytes
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* of metadata), since more metadata (e.g. rtree nodes) come from a0's base.
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*/
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#define BASE_AUTO_THP_THRESHOLD 2
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#define BASE_AUTO_THP_THRESHOLD_A0 5
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typedef enum {
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metadata_thp_disabled = 0,
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/*
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* Lazily enable hugepage for metadata. To avoid high RSS caused by THP
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* + low usage arena (i.e. THP becomes a significant percentage), the
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* "auto" option only starts using THP after a base allocator used up
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* the first THP region. Starting from the second hugepage (in a single
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* arena), "auto" behaves the same as "always", i.e. madvise hugepage
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* right away.
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*/
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metadata_thp_auto = 1,
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metadata_thp_always = 2,
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metadata_thp_mode_limit = 3
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} metadata_thp_mode_t;
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#endif /* JEMALLOC_INTERNAL_BASE_TYPES_H */
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