rte_eal.h File Reference

#include <stdint.h>
#include <sched.h>
#include <rte_per_lcore.h>

Data Structures
struct	rte_config

Macros
#define	RTE_MAGIC   19820526
#define	RTE_EAL_TAILQ_RWLOCK   (&rte_eal_get_configuration()->mem_config->qlock)
#define	RTE_EAL_MEMPOOL_RWLOCK   (&rte_eal_get_configuration()->mem_config->mplock)

Typedefs
typedef void(*	rte_usage_hook_t )(const char *prgname)

Enumerations
enum	rte_lcore_role_t
enum	rte_proc_type_t

Functions
struct rte_config *	rte_eal_get_configuration (void)
enum rte_lcore_role_t	rte_eal_lcore_role (unsigned lcore_id)
enum rte_proc_type_t	rte_eal_process_type (void)
int	rte_eal_iopl_init (void)
int	rte_eal_init (int argc, char **argv)
rte_usage_hook_t	rte_set_application_usage_hook (rte_usage_hook_t usage_func)
int	rte_eal_has_hugepages (void)
int	rte_sys_gettid (void)
static int	rte_gettid (void)

Detailed Description

EAL Configuration API

Macro Definition Documentation

#define RTE_EAL_MEMPOOL_RWLOCK   (&rte_eal_get_configuration()->mem_config->mplock)

macro to get the multiple lock of mempool shared by mutiple-instance

#define RTE_EAL_TAILQ_RWLOCK   (&rte_eal_get_configuration()->mem_config->qlock)

macro to get the lock of tailq in mem_config

#define RTE_MAGIC   19820526

Magic number written by the main partition when ready.

Typedef Documentation

typedef void(* rte_usage_hook_t)(const char *prgname)

Usage function typedef used by the application usage function.

Use this function typedef to define and call rte_set_applcation_usage_hook() routine.

Enumeration Type Documentation

enum rte_lcore_role_t

The lcore role (used in RTE or not).

enum rte_proc_type_t

The type of process in a linuxapp, multi-process setup

Function Documentation

struct rte_config* rte_eal_get_configuration ( void  )

read

Get the global configuration structure.

Returns

A pointer to the global configuration structure.

int rte_eal_has_hugepages

(

void

)

Whether EAL is using huge pages (disabled by –no-huge option). The no-huge mode cannot be used with UIO poll-mode drivers like igb/ixgbe. It is useful for NIC drivers (e.g. librte_pmd_mlx4, librte_pmd_vmxnet3) or crypto drivers (e.g. librte_crypto_nitrox) provided by third-parties such as 6WIND.

Returns

Nonzero if hugepages are enabled.

int rte_eal_init	(	int	argc,
		char **	argv
	)

Initialize the Environment Abstraction Layer (EAL).

This function is to be executed on the MASTER lcore only, as soon as possible in the application's main() function.

The function finishes the initialization process before main() is called. It puts the SLAVE lcores in the WAIT state.

When the multi-partition feature is supported, depending on the configuration (if CONFIG_RTE_EAL_MAIN_PARTITION is disabled), this function waits to ensure that the magic number is set before returning. See also the rte_eal_get_configuration() function. Note: This behavior may change in the future.

Parameters

argc	The argc argument that was given to the main() function.
argv	The argv argument that was given to the main() function.

Returns

• On success, the number of parsed arguments, which is greater or equal to zero. After the call to rte_eal_init(), all arguments argv[x] with x < ret may be modified and should not be accessed by the application.
• On failure, a negative error value.

int rte_eal_iopl_init

(

void

)

Request iopl privilege for all RPL.

This function should be called by pmds which need access to ioports.

Returns

• On success, returns 0.
• On failure, returns -1.

enum rte_lcore_role_t rte_eal_lcore_role

(

unsigned

lcore_id

)

Get a lcore's role.

Parameters

lcore_id

The identifier of the lcore.

Returns

The role of the lcore.

enum rte_proc_type_t rte_eal_process_type

(

void

)

Get the process type in a multi-process setup

Returns

The process type

static int rte_gettid ( void  )

inlinestatic

Get system unique thread id.

Returns

On success, returns the thread ID of calling process. It is always successful.

rte_usage_hook_t rte_set_application_usage_hook

(

rte_usage_hook_t

usage_func

)

Add application usage routine callout from the eal_usage() routine.

This function allows the application to include its usage message in the EAL system usage message. The routine rte_set_application_usage_hook() needs to be called before the rte_eal_init() routine in the application.

This routine is optional for the application and will behave as if the set routine was never called as the default behavior.

Parameters

func	The func argument is a function pointer to the application usage routine. Called function is defined using rte_usage_hook_t typedef, which is of the form void rte_usage_func(const char * prgname).

Calling this routine with a NULL value will reset the usage hook routine and return the current value, which could be NULL.

Returns

• Returns the current value of the rte_application_usage pointer to allow the caller to daisy chain the usage routines if needing more then one.

int rte_sys_gettid

(

void

)

A wrap API for syscall gettid.

Returns

On success, returns the thread ID of calling process. It is always successful.