rte_malloc.h File Reference

#include <stdio.h>
#include <stddef.h>
#include <rte_memory.h>

Go to the source code of this file.

Data Structures
struct	rte_malloc_socket_stats

Functions
void *	rte_malloc (const char *type, size_t size, unsigned align)
void *	rte_zmalloc (const char *type, size_t size, unsigned align)
void *	rte_calloc (const char *type, size_t num, size_t size, unsigned align)
void *	rte_realloc (void *ptr, size_t size, unsigned align)
void *	rte_malloc_socket (const char *type, size_t size, unsigned align, int socket)
void *	rte_zmalloc_socket (const char *type, size_t size, unsigned align, int socket)
void *	rte_calloc_socket (const char *type, size_t num, size_t size, unsigned align, int socket)
void	rte_free (void *ptr)
int	rte_malloc_validate (const void *ptr, size_t *size)
int	rte_malloc_get_socket_stats (int socket, struct rte_malloc_socket_stats *socket_stats)
void	rte_malloc_dump_stats (FILE *f, const char *type)
int	rte_malloc_set_limit (const char *type, size_t max)
phys_addr_t	rte_malloc_virt2phy (const void *addr)

Detailed Description

RTE Malloc. This library provides methods for dynamically allocating memory from hugepages.

Definition in file rte_malloc.h.

Function Documentation

void* rte_malloc	(	const char *	type,
		size_t	size,
		unsigned	align
	)

This function allocates memory from the huge-page area of memory. The memory is not cleared. In NUMA systems, the memory allocated resides on the same NUMA socket as the core that calls this function.

Parameters

type	A string identifying the type of allocated objects (useful for debug purposes, such as identifying the cause of a memory leak). Can be NULL.
size	Size (in bytes) to be allocated.
align	If 0, the return is a pointer that is suitably aligned for any kind of variable (in the same manner as malloc()). Otherwise, the return is a pointer that is a multiple of align. In this case, it must be a power of two. (Minimum alignment is the cacheline size, i.e. 64-bytes)

Returns

• NULL on error. Not enough memory, or invalid arguments (size is 0, align is not a power of two).
• Otherwise, the pointer to the allocated object.

Examples:

examples/distributor/main.c, examples/l2fwd-crypto/main.c, examples/multi_process/client_server_mp/mp_server/init.c, examples/qos_sched/main.c, examples/server_node_efd/server/init.c, examples/vm_power_manager/channel_manager.c, and examples/vm_power_manager/channel_monitor.c.

void* rte_zmalloc	(	const char *	type,
		size_t	size,
		unsigned	align
	)

Allocate zero'ed memory from the heap.

Equivalent to rte_malloc() except that the memory zone is initialised with zeros. In NUMA systems, the memory allocated resides on the same NUMA socket as the core that calls this function.

Parameters

type	A string identifying the type of allocated objects (useful for debug purposes, such as identifying the cause of a memory leak). Can be NULL.
size	Size (in bytes) to be allocated.
align	If 0, the return is a pointer that is suitably aligned for any kind of variable (in the same manner as malloc()). Otherwise, the return is a pointer that is a multiple of align. In this case, it must obviously be a power of two. (Minimum alignment is the cacheline size, i.e. 64-bytes)

Returns

• NULL on error. Not enough memory, or invalid arguments (size is 0, align is not a power of two).
• Otherwise, the pointer to the allocated object.

Examples:

examples/kni/main.c, examples/tep_termination/main.c, examples/vhost/main.c, and examples/vm_power_manager/channel_manager.c.

void* rte_calloc	(	const char *	type,
		size_t	num,
		size_t	size,
		unsigned	align
	)

Replacement function for calloc(), using huge-page memory. Memory area is initialised with zeros. In NUMA systems, the memory allocated resides on the same NUMA socket as the core that calls this function.

Parameters

type	A string identifying the type of allocated objects (useful for debug purposes, such as identifying the cause of a memory leak). Can be NULL.
num	Number of elements to be allocated.
size	Size (in bytes) of a single element.
align	If 0, the return is a pointer that is suitably aligned for any kind of variable (in the same manner as malloc()). Otherwise, the return is a pointer that is a multiple of align. In this case, it must obviously be a power of two. (Minimum alignment is the cacheline size, i.e. 64-bytes)

Returns

• NULL on error. Not enough memory, or invalid arguments (size is 0, align is not a power of two).
• Otherwise, the pointer to the allocated object.

void* rte_realloc	(	void *	ptr,
		size_t	size,
		unsigned	align
	)

Replacement function for realloc(), using huge-page memory. Reserved area memory is resized, preserving contents. In NUMA systems, the new area resides on the same NUMA socket as the old area.

Parameters

ptr	Pointer to already allocated memory
size	Size (in bytes) of new area. If this is 0, memory is freed.
align	If 0, the return is a pointer that is suitably aligned for any kind of variable (in the same manner as malloc()). Otherwise, the return is a pointer that is a multiple of align. In this case, it must obviously be a power of two. (Minimum alignment is the cacheline size, i.e. 64-bytes)

Returns

• NULL on error. Not enough memory, or invalid arguments (size is 0, align is not a power of two).
• Otherwise, the pointer to the reallocated memory.

void* rte_malloc_socket	(	const char *	type,
		size_t	size,
		unsigned	align,
		int	socket
	)

This function allocates memory from the huge-page area of memory. The memory is not cleared.

Parameters

type	A string identifying the type of allocated objects (useful for debug purposes, such as identifying the cause of a memory leak). Can be NULL.
size	Size (in bytes) to be allocated.
align	If 0, the return is a pointer that is suitably aligned for any kind of variable (in the same manner as malloc()). Otherwise, the return is a pointer that is a multiple of align. In this case, it must be a power of two. (Minimum alignment is the cacheline size, i.e. 64-bytes)
socket	NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this function will behave the same as rte_malloc().

Returns

• NULL on error. Not enough memory, or invalid arguments (size is 0, align is not a power of two).
• Otherwise, the pointer to the allocated object.

void* rte_zmalloc_socket	(	const char *	type,
		size_t	size,
		unsigned	align,
		int	socket
	)

Allocate zero'ed memory from the heap.

Equivalent to rte_malloc() except that the memory zone is initialised with zeros.

Parameters

type	A string identifying the type of allocated objects (useful for debug purposes, such as identifying the cause of a memory leak). Can be NULL.
size	Size (in bytes) to be allocated.
align	If 0, the return is a pointer that is suitably aligned for any kind of variable (in the same manner as malloc()). Otherwise, the return is a pointer that is a multiple of align. In this case, it must obviously be a power of two. (Minimum alignment is the cacheline size, i.e. 64-bytes)
socket	NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this function will behave the same as rte_zmalloc().

Returns

• NULL on error. Not enough memory, or invalid arguments (size is 0, align is not a power of two).
• Otherwise, the pointer to the allocated object.

Examples:

examples/ip_reassembly/main.c, examples/l2fwd-jobstats/main.c, examples/l2fwd-keepalive/main.c, examples/l2fwd/main.c, examples/l3fwd-acl/main.c, examples/l3fwd-power/main.c, examples/link_status_interrupt/main.c, examples/multi_process/client_server_mp/mp_client/client.c, examples/netmap_compat/lib/compat_netmap.c, examples/packet_ordering/main.c, examples/qos_meter/main.c, and examples/server_node_efd/node/node.c.

void* rte_calloc_socket	(	const char *	type,
		size_t	num,
		size_t	size,
		unsigned	align,
		int	socket
	)

Replacement function for calloc(), using huge-page memory. Memory area is initialised with zeros.

Parameters

type	A string identifying the type of allocated objects (useful for debug purposes, such as identifying the cause of a memory leak). Can be NULL.
num	Number of elements to be allocated.
size	Size (in bytes) of a single element.
align	If 0, the return is a pointer that is suitably aligned for any kind of variable (in the same manner as malloc()). Otherwise, the return is a pointer that is a multiple of align. In this case, it must obviously be a power of two. (Minimum alignment is the cacheline size, i.e. 64-bytes)
socket	NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this function will behave the same as rte_calloc().

Returns

• NULL on error. Not enough memory, or invalid arguments (size is 0, align is not a power of two).
• Otherwise, the pointer to the allocated object.

Examples:

examples/performance-thread/common/lthread_sched.c.

void rte_free

(

void *

ptr

)

Frees the memory space pointed to by the provided pointer.

This pointer must have been returned by a previous call to rte_malloc(), rte_zmalloc(), rte_calloc() or rte_realloc(). The behaviour of rte_free() is undefined if the pointer does not match this requirement.

If the pointer is NULL, the function does nothing.

Parameters

ptr	The pointer to memory to be freed.

Examples:

examples/kni/main.c, examples/packet_ordering/main.c, examples/performance-thread/common/lthread_sched.c, examples/tep_termination/main.c, examples/vhost/main.c, examples/vm_power_manager/channel_manager.c, and examples/vm_power_manager/channel_monitor.c.

int rte_malloc_validate	(	const void *	ptr,
		size_t *	size
	)

If malloc debug is enabled, check a memory block for header and trailer markers to indicate that all is well with the block. If size is non-null, also return the size of the block.

Parameters

ptr	pointer to the start of a data block, must have been returned by a previous call to rte_malloc(), rte_zmalloc(), rte_calloc() or rte_realloc()
size	if non-null, and memory block pointer is valid, returns the size of the memory block

Returns

-1 on error, invalid pointer passed or header and trailer markers are missing or corrupted 0 on success

int rte_malloc_get_socket_stats	(	int	socket,
		struct rte_malloc_socket_stats *	socket_stats
	)

Get heap statistics for the specified heap.

Parameters

socket	An unsigned integer specifying the socket to get heap statistics for
socket_stats	A structure which provides memory to store statistics

Returns

Null on error Pointer to structure storing statistics on success

void rte_malloc_dump_stats	(	FILE *	f,
		const char *	type
	)

Dump statistics.

Dump for the specified type to a file. If the type argument is NULL, all memory types will be dumped.

Parameters

f	A pointer to a file for output
type	A string identifying the type of objects to dump, or NULL to dump all objects.

int rte_malloc_set_limit	(	const char *	type,
		size_t	max
	)

Set the maximum amount of allocated memory for this type.

This is not yet implemented

Parameters

type	A string identifying the type of allocated objects.
max	The maximum amount of allocated bytes for this type.

Returns

• 0: Success.
• (-1): Error.

phys_addr_t rte_malloc_virt2phy

(

const void *

addr

)

Return the physical address of a virtual address obtained through rte_malloc

Parameters

addr	Adress obtained from a previous rte_malloc call

Returns

NULL on error otherwise return physical address of the buffer

Examples:

examples/l2fwd-crypto/main.c.