226 строки
7.8 KiB
C
226 строки
7.8 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2006 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#ifndef MCA_BTL_IB_ENDPOINT_H
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#define MCA_BTL_IB_ENDPOINT_H
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#include "opal/class/opal_list.h"
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#include "opal/event/event.h"
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#include "ompi/mca/pml/pml.h"
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#include "ompi/mca/btl/btl.h"
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#include "btl_openib_frag.h"
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#include "btl_openib.h"
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#include "btl_openib_eager_rdma.h"
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#include <errno.h>
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#include <string.h>
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#include "ompi/mca/btl/base/btl_base_error.h"
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#if defined(c_plusplus) || defined(__cplusplus)
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extern "C" {
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#endif
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struct mca_btl_openib_frag_t;
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/**
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* State of IB endpoint connection.
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*/
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typedef enum {
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/* Defines the state in which this BTL instance
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* has started the process of connection */
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MCA_BTL_IB_CONNECTING,
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/* Waiting for ack from endpoint */
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MCA_BTL_IB_CONNECT_ACK,
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/*Waiting for final connection ACK from endpoint */
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MCA_BTL_IB_WAITING_ACK,
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/* Connected ... both sender & receiver have
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* buffers associated with this connection */
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MCA_BTL_IB_CONNECTED,
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/* Connection is closed, there are no resources
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* associated with this */
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MCA_BTL_IB_CLOSED,
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/* Maximum number of retries have been used.
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* Report failure on send to upper layer */
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MCA_BTL_IB_FAILED
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} mca_btl_openib_endpoint_state_t;
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struct mca_btl_openib_rem_info_t {
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uint32_t rem_qp_num[2];
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/* Remote QP number (Low and High priority) */
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uint16_t rem_lid;
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/* Local identifier of the remote process */
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uint32_t rem_psn[2];
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/* Remote processes port sequence number (Low and High) */
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uint64_t rem_subnet_id;
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/* subnet id of remote process */
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/* MTU of remote process */
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uint32_t rem_mtu;
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/* index of remote endpoint in endpoint array */
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uint32_t rem_index;
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};
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typedef struct mca_btl_openib_rem_info_t mca_btl_openib_rem_info_t;
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/**
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* An abstraction that represents a connection to a endpoint process.
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* An instance of mca_btl_base_endpoint_t is associated w/ each process
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* and BTL pair at startup. However, connections to the endpoint
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* are established dynamically on an as-needed basis:
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*/
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struct mca_btl_base_endpoint_t {
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opal_list_item_t super;
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struct mca_btl_openib_module_t* endpoint_btl;
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/**< BTL instance that created this connection */
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struct mca_btl_openib_proc_t* endpoint_proc;
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/**< proc structure corresponding to endpoint */
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mca_btl_openib_endpoint_state_t endpoint_state;
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/**< current state of the connection */
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size_t endpoint_retries;
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/**< number of connection retries attempted */
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double endpoint_tstamp;
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/**< timestamp of when the first connection was attempted */
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opal_mutex_t endpoint_lock;
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/**< lock for concurrent access to endpoint state */
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opal_list_t pending_send_frags;
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/**< list of pending send frags for this endpotint */
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opal_list_t pending_frags[2]; /**< list of pending frags */
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opal_list_t pending_get_frags; /**< list of pending rget ops */
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opal_list_t pending_put_frags; /**< list of pending rput ops */
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mca_btl_openib_rem_info_t rem_info;
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uint32_t lcl_psn[2];
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/* Local processes port sequence number (Low and High) */
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struct ibv_qp* lcl_qp[2]; /* Local QP (Low and High) */
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struct ibv_qp_attr* lcl_qp_attr[2];
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/* Local QP attributes (Low and High) */
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int32_t sd_tokens[2]; /**< number of send tokens */
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int32_t get_tokens; /**< number of available get tokens */
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int32_t rd_posted[2]; /**< number of descriptors posted to the nic*/
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int32_t rd_credits[2]; /**< number of credits to return to peer */
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int32_t sd_credits[2]; /**< number of send wqe entries being used to return credits */
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int32_t sd_wqe[2]; /**< number of available send wqe entries */
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uint64_t subnet_id; /**< subnet id of this endpoint*/
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int32_t eager_recv_count; /**< number of eager received */
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mca_btl_openib_eager_rdma_remote_t eager_rdma_remote;
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/**< info about remote RDMA buffer */
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mca_btl_openib_eager_rdma_local_t eager_rdma_local;
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/**< info about local RDMA buffer */
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uint32_t index; /**< index of the endpoint in endpoints array */
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struct mca_btl_openib_frag_t *credit_frag[2]; /**< frags for sending explicit high priority credits */
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bool nbo; /**< does the endpoint require network byte ordering? */
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bool use_eager_rdma; /**< use eager rdma for this peer? */
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};
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typedef struct mca_btl_base_endpoint_t mca_btl_base_endpoint_t;
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typedef mca_btl_base_endpoint_t mca_btl_openib_endpoint_t;
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OBJ_CLASS_DECLARATION(mca_btl_openib_endpoint_t);
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int mca_btl_openib_endpoint_send(mca_btl_base_endpoint_t* endpoint, struct mca_btl_openib_frag_t* frag);
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int mca_btl_openib_endpoint_connect(mca_btl_base_endpoint_t*);
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void mca_btl_openib_post_recv(void);
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void mca_btl_openib_endpoint_send_credits(mca_btl_base_endpoint_t*, const int);
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void mca_btl_openib_endpoint_connect_eager_rdma(mca_btl_openib_endpoint_t*);
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static inline int btl_openib_endpoint_post_rr(mca_btl_base_endpoint_t *endpoint,
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const int additional, const int prio)
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{
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mca_btl_openib_module_t *openib_btl = endpoint->endpoint_btl;
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OPAL_THREAD_LOCK(&openib_btl->ib_lock);
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if(endpoint->rd_posted[prio] <=
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mca_btl_openib_component.rd_low + additional &&
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endpoint->rd_posted[prio] < openib_btl->rd_num) {
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int rc;
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int32_t i, num_post = openib_btl->rd_num - endpoint->rd_posted[prio];
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struct ibv_recv_wr* bad_wr;
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ompi_free_list_t *free_list;
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free_list = &openib_btl->recv_free[prio];
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for(i = 0; i < num_post; i++) {
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ompi_free_list_item_t* item;
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mca_btl_openib_frag_t* frag;
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OMPI_FREE_LIST_WAIT(free_list, item, rc);
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frag = (mca_btl_openib_frag_t*)item;
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frag->endpoint = endpoint;
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if(ibv_post_recv(endpoint->lcl_qp[prio], &frag->wr_desc.rd_desc,
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&bad_wr)) {
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BTL_ERROR(("error posting receive errno says %s\n",
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strerror(errno)));
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return OMPI_ERROR;
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}
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}
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OPAL_THREAD_ADD32(&endpoint->rd_posted[prio], num_post);
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OPAL_THREAD_ADD32(&endpoint->rd_credits[prio], num_post);
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}
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OPAL_THREAD_UNLOCK(&openib_btl->ib_lock);
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return OMPI_SUCCESS;
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}
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static inline int btl_openib_check_send_credits(
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mca_btl_openib_endpoint_t *endpoint, const int prio)
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{
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if(!mca_btl_openib_component.use_srq &&
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endpoint->rd_credits[prio] >= mca_btl_openib_component.rd_win)
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return OPAL_THREAD_ADD32(&endpoint->sd_credits[prio], 1) == 1;
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if(BTL_OPENIB_LP_QP == prio) /* nothing more for low prio QP */
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return 0;
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/* for high prio check eager RDMA credits */
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if(endpoint->eager_rdma_local.credits >= mca_btl_openib_component.rd_win)
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return OPAL_THREAD_ADD32(&endpoint->sd_credits[prio], 1) == 1;
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return 0;
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}
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#if defined(c_plusplus) || defined(__cplusplus)
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}
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#endif
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#endif
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