buffer_pool Struct Reference

Unified buffer pool with lock-free fast path. More...

#include <lib/buffer_pool.h>

Public Member Functions
	_Atomic (buffer_node_t *) free_list
	Lock-free stack of available buffers.
Atomic counters @{
	_Atomic (size_t) current_bytes
	Total bytes in pool.
	_Atomic (size_t) used_bytes
	Bytes currently in use.
	_Atomic (size_t) peak_bytes
	Peak bytes in use.
	_Atomic (size_t) peak_pool_bytes
	Peak bytes in pool.
	_Atomic (uint64_t) hits
	Allocations from free list.
	_Atomic (uint64_t) allocs
	New buffer allocations.
	_Atomic (uint64_t) returns
	Buffers returned to free list.
	_Atomic (uint64_t) shrink_freed
	Buffers freed by shrink.
	_Atomic (uint64_t) malloc_fallbacks
	Allocations that bypassed pool.

Data Fields
mutex_t	shrink_mutex
	Only used for shrinking.
size_t	max_bytes
	Maximum total bytes allowed.
uint64_t	shrink_delay_ms
	Time before unused buffers freed.

Detailed Description

Unified buffer pool with lock-free fast path.

Definition at line 90 of file buffer_pool.h.

Member Function Documentation

_Atomic() [1/10]

buffer_pool::_Atomic

(

buffer_node_t *

)

Lock-free stack of available buffers.

_Atomic() [2/10]

buffer_pool::_Atomic

(

size_t

)

Total bytes in pool.

_Atomic() [3/10]

buffer_pool::_Atomic

(

size_t

)

Peak bytes in use.

_Atomic() [4/10]

buffer_pool::_Atomic

(

size_t

)

Peak bytes in pool.

_Atomic() [5/10]

buffer_pool::_Atomic

(

size_t

)

Bytes currently in use.

_Atomic() [6/10]

buffer_pool::_Atomic

(

uint64_t

)

New buffer allocations.

_Atomic() [7/10]

buffer_pool::_Atomic

(

uint64_t

)

Allocations from free list.

_Atomic() [8/10]

buffer_pool::_Atomic

(

uint64_t

)

Allocations that bypassed pool.

_Atomic() [9/10]

buffer_pool::_Atomic

(

uint64_t

)

Buffers returned to free list.

_Atomic() [10/10]

buffer_pool::_Atomic

(

uint64_t

)

Buffers freed by shrink.

Field Documentation

max_bytes

size_t buffer_pool::max_bytes

Maximum total bytes allowed.

Definition at line 94 of file buffer_pool.h.

Referenced by buffer_pool_create(), and buffer_pool_log_stats().

shrink_delay_ms

uint64_t buffer_pool::shrink_delay_ms

Time before unused buffers freed.

Definition at line 95 of file buffer_pool.h.

Referenced by buffer_pool_create(), and buffer_pool_shrink().

shrink_mutex

mutex_t buffer_pool::shrink_mutex

Only used for shrinking.

Definition at line 92 of file buffer_pool.h.

Referenced by buffer_pool_create(), buffer_pool_destroy(), and buffer_pool_shrink().

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The documentation for this struct was generated from the following file:

• buffer_pool.h