rte_ring_dequeue_burst用法 rte_ring_dequeue_burst函数用于从环形队列中批量出队元素。函数的原型如下: ```c unsigned rte_ring_dequeue_burst(struct rte_ring *r, void **obj_table, unsigned int n) ``` 参数说明: - r:指向要出队的环形队列的指针。 - obj_table:指向存储出队元素指针的数组的指针...
struct rte_ring *r = rte_ring_create(“MY_RING”, 1024,rte_socket_id(), 0); 2.出入队 有不同的出入队方式(单、bulk、burst)都在rte_ring.h中。 例如:rte_ring_enqueue和rte_ring_dequeue 这种数据结构与链表队列相比: 优点如下: 更快:比较void *大小的数据,只需要执行单次Compare-And-Swap指令,...
uint16_t rte_vhost_dequeue_burst(int vid, uint16_t queue_id, struct rte_mempool *mbuf_pool, struct rte_mbuf **pkts, uint16_t count) //数据包流向 VM 到 OVS 具体的发送过程概括来说就是,如果OVS往VM发送数据包,对应的vhost端口去avail ring中读取可用的buffer地址,转换成VVA后,进行数据包拷贝,...
}else{returnMAX_RING_BURST; }#elseuint16_tnb_rx = rte_ring_sc_dequeue_burst(ptask->rx_params_sw.rx_rings[ptask->rx_params_sw.last_read_ring], (void**)rx_mbuf, MAX_RING_BURST); ++ptask->rx_params_sw.last_read_ring;if(unlikely(ptask->rx_params_sw.last_read_ring == ptask-...
rte_compiler_barrier();/*Wait until it's our turn to add our buffer to the used ring.*/while(unlikely(vq->last_used_idx !=res_base_idx)) rte_pause();*(volatileuint16_t *)&vq->used->idx +=count; vq->last_used_idx =res_end_idx;/*flush used->idx update before we read avai...
}void*consumer(void*arg){while(1) {structrte_mbuf*mbufs[BURST_SIZE];unsignedintnb_rx =rte_ring_dequeue_bulk(ring, (void**)mbufs, BURST_SIZE,NULL);for(unsignedinti =0; i < nb_rx; i++) {char*data =rte_pktmbuf_mtod(mbufs[i],char*);printf("Consumer %ld received: %s\n", (lo...
* and size(ring)-1.*/*entries = (r->prod.tail - *old_head);/*Set the actual entries for dequeue*/if(n > *entries) n= (behavior == RTE_RING_QUEUE_FIXED) ?0: *entries;if(unlikely(n ==0))return0;*new_head = *old_head +n;if(is_sc) ...
ret = rte_ring_sc_dequeue_bulk( app.rings_rx[i], (void**) worker_mbuf->array, app.burst_size_worker_read);if(ret == -ENOENT)continue;do{ ret = rte_ring_sp_enqueue_bulk( app.rings_tx[i ^1], (void**) worker_mbuf->array, ...
突发(burst)入队 - 尽可能地入队N个对象 与链表实现的队列相比,ring有以下优点: 更快- 仅需要一次CAS(Compare-And-Swap)操作 比完全无锁的队列实现更简单 适配批量操作 - 由于指针存放在数组中,相比链表式队列多个对象的操作没有太大的cache miss 当然,ring也有缺点: ...
unsigned int n, enum rte_ring_queue_behavior behavior, uint32_t *old_head, uint32_t *new_head, uint32_t *free_entries) { const uint32_t capacity = r->capacity; unsigned int max = n; int success; do { /* Reset n to the initial burst count */ ...