DEQUEUE_PTRS(); rte_smp_rmb(); /* * If there are other dequeues in progress that preceded us, * we need to wait for them to complete cgm 等待之前的出队操作完成 */ while (unlikely(r->cons.tail != cons_head)) { rte_pause(); /* Set RTE_RING_PAUSE_REP_COUNT to avoid spin to...
*old_head = r->cons.head; /* add rmb barrier to avoid load/load reorder in weak * memory model. It is noop on x86 */ rte_smp_rmb(); /* The subtraction is done between two unsigned 32bits value * (the result is always modulo 32 bits even if we have * cons_head > prod_tail...
unsignedintmax =n;intsuccess;/*move cons.head atomically*/do{/*Restore n as it may change every loop*/n=max;*old_head = r->cons.head;/*add rmb barrier to avoid load/load reorder in weak * memory model. It is noop on x86*/rte_smp_rmb();/*The subtraction is done between two ...
rte_smp_rmb(); /* * If there are other dequeues in progress that preceded us, * we need to wait for them to complete cgm 等待之前的出队操作完成 */ while (unlikely(r->cons.tail != cons_head)) { rte_pause(); /* Set RTE_RING_PAUSE_REP_COUNT to avoid spin too lon...
SMP125高压压力变送器传感器 专业生产 参数可定制 SMP131-SLH205G2F26MD-5A压力变送器传感器 SMP131-SLH702N2F26Y5D-5A精巧单晶硅压力变送器 传感器 专业生产 参数可定制 SMP131-SLS356G2F24MD-5A赫斯曼压力变送器传感器 SMP131X/SMP135X/SMP121X/SMP125X智能压力变送器hart远程调试 SMP2088X智能压力...
/*src/dpdk-17.08/lib/librte_eal/common/include/arch/x86/rte_atomic.h*/52#definerte_mb() _mm_mfence()54#definerte_wmb() _mm_sfence()56#definerte_rmb() _mm_lfence()58#definerte_smp_mb() rte_mb()60#definerte_smp_wmb() rte_compiler_barrier()62#definerte_smp_rmb() rte_compiler...
rte_smp_wmb(); rte_smp_rmb(); vq->used->idx += count; vhost_log_used_vring(dev, vq, offsetof(struct vring_used, idx), sizeof(vq->used->idx)); /* Kick guest if required. */ if (!(vq->avail->flags & VRING_AVAIL_F_NO_INTERRUPT) ...
38 rte_smp_rmb(); 39 40 while (unlikely(r->cons.tail != cons_head)) { 41 rte_pause(); 42 43 if (RTE_RING_PAUSE_REP_COUNT && 44 ++rep == RTE_RING_PAUSE_REP_COUNT) { 45 rep = 0; 46 sched_yield(); 47 } 48 }
rte_smp_rmb(); vq->used->idx +=count; vhost_log_used_vring(dev, vq, offsetof(structvring_used, idx),sizeof(vq->used->idx));/*Kick guest if required.*/if(!(vq->avail->flags &VRING_AVAIL_F_NO_INTERRUPT)&& (vq->callfd >=0))eventfd_write(vq->callfd, (eventfd_t)1);} ...
rte_smp_wmb();elserte_smp_rmb();//2.如果有其他生产者生产数据,那么需要等待其将数据生产完更新tail指针后,本生产者才能更新tail指针if(!single)while(unlikely(ht->tail !=old_val)) rte_pause();//3.更新tail指针,更新的位置为最新的生产位置,意味着刚刚生产的数据已经全部可以被消费者消费ht->tail ...