diff options
Diffstat (limited to 'storage/xtradb/include/buf0buf.ic')
| -rw-r--r-- | storage/xtradb/include/buf0buf.ic | 74 |
1 files changed, 53 insertions, 21 deletions
diff --git a/storage/xtradb/include/buf0buf.ic b/storage/xtradb/include/buf0buf.ic index 2cb0d8ef497..a081d6a34c0 100644 --- a/storage/xtradb/include/buf0buf.ic +++ b/storage/xtradb/include/buf0buf.ic @@ -1,6 +1,6 @@ /***************************************************************************** -Copyright (c) 1995, 2010, Innobase Oy. All Rights Reserved. +Copyright (c) 1995, 2011, Oracle and/or its affiliates. All Rights Reserved. Copyright (c) 2008, Google Inc. Portions of this file contain modifications contributed and copyrighted by @@ -62,6 +62,27 @@ buf_block_get_freed_page_clock( } /********************************************************************//** +Tells if a block is still close enough to the MRU end of the LRU list +meaning that it is not in danger of getting evicted and also implying +that it has been accessed recently. +Note that this is for heuristics only and does not reserve buffer pool +mutex. +@return TRUE if block is close to MRU end of LRU */ +UNIV_INLINE +ibool +buf_page_peek_if_young( +/*===================*/ + const buf_page_t* bpage) /*!< in: block */ +{ + /* FIXME: bpage->freed_page_clock is 31 bits */ + return((buf_pool->freed_page_clock & ((1UL << 31) - 1)) + < ((ulint) bpage->freed_page_clock + + (buf_pool->curr_size + * (BUF_LRU_OLD_RATIO_DIV - buf_LRU_old_ratio) + / (BUF_LRU_OLD_RATIO_DIV * 4)))); +} + +/********************************************************************//** Recommends a move of a block to the start of the LRU list if there is danger of dropping from the buffer pool. NOTE: does not reserve the buffer pool mutex. @@ -89,12 +110,7 @@ buf_page_peek_if_too_old( buf_pool->stat.n_pages_not_made_young++; return(FALSE); } else { - /* FIXME: bpage->freed_page_clock is 31 bits */ - return((buf_pool->freed_page_clock & ((1UL << 31) - 1)) - > ((ulint) bpage->freed_page_clock - + (buf_pool->curr_size - * (BUF_LRU_OLD_RATIO_DIV - buf_LRU_old_ratio) - / (BUF_LRU_OLD_RATIO_DIV * 4)))); + return(!buf_page_peek_if_young(bpage)); } } @@ -754,6 +770,35 @@ buf_block_get_lock_hash_val( } /********************************************************************//** +Allocates a buf_page_t descriptor. This function must succeed. In case +of failure we assert in this function. +@return: the allocated descriptor. */ +UNIV_INLINE +buf_page_t* +buf_page_alloc_descriptor(void) +/*===========================*/ +{ + buf_page_t* bpage; + + bpage = (buf_page_t*) ut_malloc(sizeof *bpage); + ut_d(memset(bpage, 0, sizeof *bpage)); + UNIV_MEM_ALLOC(bpage, sizeof *bpage); + + return(bpage); +} + +/********************************************************************//** +Free a buf_page_t descriptor. */ +UNIV_INLINE +void +buf_page_free_descriptor( +/*=====================*/ + buf_page_t* bpage) /*!< in: bpage descriptor to free. */ +{ + ut_free(bpage); +} + +/********************************************************************//** Allocates a buffer block. @return own: the allocated block, in state BUF_BLOCK_MEMORY */ UNIV_INLINE @@ -910,19 +955,6 @@ buf_block_buf_fix_inc_func( block->page.buf_fix_count++; } -#ifdef UNIV_SYNC_DEBUG -/** Increments the bufferfix count. -@param b in/out: block to bufferfix -@param f in: file name where requested -@param l in: line number where requested */ -# define buf_block_buf_fix_inc(b,f,l) buf_block_buf_fix_inc_func(f,l,b) -#else /* UNIV_SYNC_DEBUG */ -/** Increments the bufferfix count. -@param b in/out: block to bufferfix -@param f in: file name where requested -@param l in: line number where requested */ -# define buf_block_buf_fix_inc(b,f,l) buf_block_buf_fix_inc_func(b) -#endif /* UNIV_SYNC_DEBUG */ /*******************************************************************//** Decrements the bufferfix count. */ @@ -1119,7 +1151,7 @@ buf_block_dbg_add_level( where we have acquired latch */ ulint level) /*!< in: latching order level */ { - sync_thread_add_level(&block->lock, level); + sync_thread_add_level(&block->lock, level, FALSE); } #endif /* UNIV_SYNC_DEBUG */ #endif /* !UNIV_HOTBACKUP */ |