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eb04f0f8ef
INNODB_COMPRESSION_BUDDY and INNODB_COMPRESSION_BUDDY_RESET. buf_buddy_stat_struct, buf_buddy_stat_t, buf_buddy_stat[]: Statistics of the buddy system grouped by block size. i_s_innodb_compression_buddy, i_s_innodb_compression_buddy_reset: New INFORMATION_SCHEMA plugins. i_s_compression_buddy_fields_info[]: Define the fields: size, used, free, relocated, relocated_sec. i_s_compression_buddy_fill_low(), i_s_compression_buddy_fill(), i_s_compression_buddy_reset_fill(): Fill the fields. i_s_compression_buddy_init(), i_s_compression_buddy_reset_init(): Initialize the tables.
73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/******************************************************
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Binary buddy allocator for compressed pages
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(c) 2006 Innobase Oy
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Created December 2006 by Marko Makela
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*******************************************************/
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#ifndef buf0buddy_h
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#define buf0buddy_h
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#ifdef UNIV_MATERIALIZE
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# undef UNIV_INLINE
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# define UNIV_INLINE
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#endif
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#include "univ.i"
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#include "buf0types.h"
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/**************************************************************************
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Allocate a block. The thread calling this function must hold
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buf_pool_mutex and must not hold buf_pool_zip_mutex or any
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block->mutex. The buf_pool_mutex may only be released and reacquired
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if lru != NULL. This function should only be used for allocating
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compressed page frames or control blocks (buf_page_t). Allocated
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control blocks must be properly initialized immediately after
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buf_buddy_alloc() has returned the memory, before releasing
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buf_pool_mutex. */
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UNIV_INLINE
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void*
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buf_buddy_alloc(
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/*============*/
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/* out: allocated block,
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possibly NULL if lru == NULL */
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ulint size, /* in: block size, up to UNIV_PAGE_SIZE */
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ibool* lru) /* in: pointer to a variable that will be assigned
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TRUE if storage was allocated from the LRU list
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and buf_pool_mutex was temporarily released,
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or NULL if the LRU list should not be used */
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__attribute__((malloc));
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/**************************************************************************
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Release a block. */
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UNIV_INLINE
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void
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buf_buddy_free(
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/*===========*/
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void* buf, /* in: block to be freed, must not be
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pointed to by the buffer pool */
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ulint size) /* in: block size, up to UNIV_PAGE_SIZE */
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__attribute__((nonnull));
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/** Statistics of buddy blocks of a given size. */
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struct buf_buddy_stat_struct {
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/** Number of blocks allocated from the buddy system. */
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ulint used;
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/** Number of blocks relocated by the buddy system. */
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ib_uint64_t relocated;
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/** Total duration of block relocations, in microseconds. */
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ib_uint64_t relocated_usec;
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};
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typedef struct buf_buddy_stat_struct buf_buddy_stat_t;
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/** Statistics of the buddy system, indexed by block size.
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Protected by buf_pool_mutex. */
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extern buf_buddy_stat_t buf_buddy_stat[BUF_BUDDY_SIZES + 1];
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#ifndef UNIV_NONINL
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# include "buf0buddy.ic"
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#endif
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#endif /* buf0buddy_h */
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