DPDK  21.02.0
Data Structures | Macros | Enumerations
rte_ring_core.h File Reference
#include <stdio.h>
#include <stdint.h>
#include <string.h>
#include <sys/queue.h>
#include <errno.h>
#include <rte_common.h>
#include <rte_config.h>
#include <rte_memory.h>
#include <rte_lcore.h>
#include <rte_atomic.h>
#include <rte_branch_prediction.h>
#include <rte_memzone.h>
#include <rte_pause.h>
#include <rte_debug.h>

Go to the source code of this file.

Data Structures

struct  rte_ring_headtail
struct  rte_ring


#define RING_F_SP_ENQ   0x0001
#define RING_F_SC_DEQ   0x0002
#define RING_F_EXACT_SZ   0x0004
#define RTE_RING_SZ_MASK   (0x7fffffffU)
#define RING_F_MP_RTS_ENQ   0x0008
#define RING_F_MC_RTS_DEQ   0x0010
#define RING_F_MP_HTS_ENQ   0x0020
#define RING_F_MC_HTS_DEQ   0x0040


enum  rte_ring_queue_behavior { RTE_RING_QUEUE_FIXED = 0, RTE_RING_QUEUE_VARIABLE }
enum  rte_ring_sync_type { RTE_RING_SYNC_MT, RTE_RING_SYNC_ST }

Detailed Description

This file contains definion of RTE ring structure itself, init flags and some related macros. For majority of DPDK entities, it is not recommended to include this file directly, use include <rte_ring.h> or <rte_ring_elem.h> instead.

Definition in file rte_ring_core.h.

Macro Definition Documentation

sizeof(RTE_RING_MZ_PREFIX) + 1)
Definition: rte_memzone.h:51

The maximum length of a ring name.


Definition at line 53 of file rte_ring_core.h.

#define RING_F_SP_ENQ   0x0001
#define RING_F_SC_DEQ   0x0002
#define RING_F_EXACT_SZ   0x0004

Ring is to hold exactly requested number of entries. Without this flag set, the ring size requested must be a power of 2, and the usable space will be that size - 1. With the flag, the requested size will be rounded up to the next power of two, but the usable space will be exactly that requested. Worst case, if a power-of-2 size is requested, half the ring space will be wasted.

Definition at line 171 of file rte_ring_core.h.

#define RTE_RING_SZ_MASK   (0x7fffffffU)

Ring size mask

Definition at line 172 of file rte_ring_core.h.

#define RING_F_MP_RTS_ENQ   0x0008

The default enqueue is "MP RTS".

Definition at line 174 of file rte_ring_core.h.

#define RING_F_MC_RTS_DEQ   0x0010

The default dequeue is "MC RTS".

Definition at line 175 of file rte_ring_core.h.

#define RING_F_MP_HTS_ENQ   0x0020

The default enqueue is "MP HTS".

Definition at line 177 of file rte_ring_core.h.

#define RING_F_MC_HTS_DEQ   0x0040

The default dequeue is "MC HTS".

Definition at line 178 of file rte_ring_core.h.

Enumeration Type Documentation

enqueue/dequeue behavior types


Enq/Deq a fixed number of items from a ring


Enq/Deq as many items as possible from ring

Definition at line 44 of file rte_ring_core.h.

prod/cons sync types


multi-thread safe (default mode)


single thread only

Definition at line 57 of file rte_ring_core.h.