sge.lkey = conn->rdma_local_mr->lkey;TEST_NZ(ibv_post_send(conn->qp, &wr, &bad_wr)); conn->send_msg->type = MSG_DONE;send_message(conn); }elseif(conn->send_state == SS_DONE_SENT && conn->recv_state == RS_DONE_R
[RDMA_USER_CM_CMD_RESOLVE_ADDR] = ucma_resolve_addr, [RDMA_USER_CM_CMD_JOIN_MCAST] = ucma_join_multicast }; UCMA_CMD_CONNECT -> static ssize_t (*ucma_cmd_table[]) -> static ssize_t ucma_connect copy_from_user ucma_get_ctx_dev ucma_copy_conn_param -> RDMA/cma:为AF...
UCMA_CMD_CONNECT -> static ssize_t (*ucma_cmd_table[]) -> static ssize_t ucma_connect copy_from_user ucma_get_ctx_dev ucma_copy_conn_param -> RDMA/cma:为AF_IB设置qkey,允许用户在使用AF_IB时指定qkey。 qkey 被添加到 struct rdma_ucm_conn_param 中代替保留字段,但为了向后兼容,仅当...
RDMA的优势在于能够绕过操作系统内核,直接在网络适配器上进行数据传输,提高了数据传输效率和性能。 在RDMA架构中,数据可以直接从一个节点的内存传输到另一个节点的内存,而不需要CPU的介入。这种直接访问内存的方式,大大减少了传输过程中的数据复制和上下文切换的开销,提升了数据传输的速度和效率。 RDMA的工作原理 RDMA...
(&gpuData,DATA_SIZE);//初始化RDMA设备structrdma_cm_id*id;structrdma_cm_event*event;structrdma_event_channel*ec;structrdma_conn_paramcm_params;//...(省略RDMA设备初始化的具体代码)//注册GPU内存以供RDMA访问//注意:这通常不是CUDAAPI的一部分,而是RDMA库与CUDA的集成//假设有一个函数可以注册GPU...
private_data, (size_t *)&ep->conn_param.private_data_len); } else { vrb_msg_ep_prepare_rdma_cm_hdr(ep->cm_priv_data, ep->id); } vrb_prof_func_start("rdma_connect"); ret = rdma_connect(ep->id, &ep->conn_param); vrb_prof_func_end("rdma_connect"); if (!ret && ep->...
由于我们使用 RDMA read操作,我们必须在 struct rdma_conn_param 中设置initiator_depth 和responder_resources。这些控制并行的 RDMA read请求的数量(These control the number of simultaneous outstanding RDMA read requests): ...
void* recv_buf;#defineRECV_BUF_SIZE 4096structibv_mr* recv_mr;inton_route_resolved(structrdma_cm_id* id){intrc =0;structrdma_conn_paramcm_params;structibv_qp_init_attrqp_attr={0};structPfRdmaConnection* conn = (structPfRdmaConnection*)id->context;structibv_context* rdma_context = id...
int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param); Description Therdma_connectfunction initiates a connection request to a remote destination. Note:The route to the destination address must be resolved by running therdma_resolve_routecall or by running therdma_create_...
int rdma_connect (struct rdma_cm_id *id, struct rdma_conn_param *conn_param); ARGUMENTSid RDMA identifier. conn_param connection parameters. See CONNECTION PROPERTIES below for details. DESCRIPTION For an rdma_cm_id of type RDMA_PS_TCP, this call initiates a connection request to a remot...