400 строки
13 KiB
C++
400 строки
13 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 (c) 2007 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2006-2007 Los Alamos National Security, LLC. All rights
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* reserved.
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* Copyright (c) 2006-2007 Voltaire All rights reserved.
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* Copyright (c) 2007 Mellanox Technologies. 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.h"
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#include "btl_openib_frag.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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#include "connect/base.h"
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BEGIN_C_DECLS
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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_qp_info_t {
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uint32_t rem_qp_num;
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/* Remote QP number */
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uint32_t rem_psn;
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/* Remote processes port sequence number */
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}; typedef struct mca_btl_openib_rem_qp_info_t mca_btl_openib_rem_qp_info_t;
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struct mca_btl_openib_rem_srq_info_t {
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/* Remote SRQ number */
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uint32_t rem_srq_num;
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}; typedef struct mca_btl_openib_rem_srq_info_t mca_btl_openib_rem_srq_info_t;
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struct mca_btl_openib_rem_info_t {
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uint16_t rem_lid;
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/* Local identifier of the remote process */
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uint64_t rem_subnet_id;
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/* subnet id of remote process */
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uint32_t rem_mtu;
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/* MTU of remote process */
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uint32_t rem_index;
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/* index of remote endpoint in endpoint array */
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mca_btl_openib_rem_qp_info_t *rem_qps;
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/* remote xrc_srq info , used only with xrc connections */
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mca_btl_openib_rem_srq_info_t *rem_srqs;
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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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* Agggregates all per peer qp info for an endpoint
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*/
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struct mca_btl_openib_endpoint_pp_qp_t {
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int32_t sd_credits; /**< this rank's view of the credits
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* available for sending:
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* this is the credits granted by the
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* remote peer which has some relation to the
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* number of receive buffers posted remotely
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*/
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int32_t rd_posted; /**< number of descriptors posted to the nic*/
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int32_t rd_credits; /**< number of credits to return to peer */
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int32_t cm_received; /**< Credit messages received */
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int32_t cm_return; /**< how may credits to return */
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int32_t cm_sent; /**< Outstanding number of credit messages */
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}; typedef struct mca_btl_openib_endpoint_pp_qp_t mca_btl_openib_endpoint_pp_qp_t;
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/**
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* Aggregates all srq qp info for an endpoint
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*/
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struct mca_btl_openib_endpoint_srq_qp_t {
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int32_t dummy;
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}; typedef struct mca_btl_openib_endpoint_srq_qp_t mca_btl_openib_endpoint_srq_qp_t;
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typedef struct mca_btl_openib_qp_t {
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struct ibv_qp *lcl_qp;
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uint32_t lcl_psn;
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int32_t sd_wqe; /**< number of available send wqe entries */
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opal_list_t pending_frags[2]; /**< put fragments here if there is no wqe
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available */
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int users;
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opal_mutex_t lock;
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} mca_btl_openib_qp_t;
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typedef struct mca_btl_openib_endpoint_qp_t {
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mca_btl_openib_qp_t *qp;
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opal_list_t pending_frags[2]; /**< put fragment here if there is no credits
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available */
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int32_t rd_credit_send_lock; /**< Lock credit send fragment */
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mca_btl_openib_send_control_frag_t *credit_frag;
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union {
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mca_btl_openib_endpoint_srq_qp_t srq_qp;
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mca_btl_openib_endpoint_pp_qp_t pp_qp;
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} u;
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} mca_btl_openib_endpoint_qp_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_lazy_frags;
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/**< list of pending frags due to lazy connection establishment
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* for this endpotint
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*/
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mca_btl_openib_endpoint_qp_t *qps;
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uint32_t xrc_recv_qp_num; /* in xrc we will use it as recv qp */
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uint32_t xrc_recv_psn;
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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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/* Local processes port sequence number (Low and High) */
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int32_t get_tokens; /**< number of available get tokens */
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uint64_t subnet_id; /**< subnet id of this endpoint*/
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struct ib_address_t *ib_addr; /**< used only for xrc; pointer to struct
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that keeps remote port info */
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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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int32_t index; /**< index of the endpoint in endpoints array */
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/**< 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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mca_btl_openib_rem_info_t rem_info;
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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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static inline int32_t qp_get_wqe(mca_btl_openib_endpoint_t *ep, const int qp)
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{
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return OPAL_THREAD_ADD32(&ep->qps[qp].qp->sd_wqe, -1);
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}
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static inline int32_t qp_put_wqe(mca_btl_openib_endpoint_t *ep, const int qp)
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{
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return OPAL_THREAD_ADD32(&ep->qps[qp].qp->sd_wqe, 1);
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}
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int mca_btl_openib_endpoint_send(mca_btl_base_endpoint_t*,
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mca_btl_openib_send_frag_t*);
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int mca_btl_openib_endpoint_post_send(mca_btl_openib_endpoint_t*,
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mca_btl_openib_send_frag_t*);
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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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int mca_btl_openib_endpoint_post_recvs(mca_btl_openib_endpoint_t*);
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void mca_btl_openib_endpoint_connected(mca_btl_openib_endpoint_t*);
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void mca_btl_openib_endpoint_init(mca_btl_openib_module_t*,
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mca_btl_base_endpoint_t*);
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static inline int post_recvs(mca_btl_base_endpoint_t *ep, const int qp,
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const int num_post)
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{
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int i;
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struct ibv_recv_wr *bad_wr, *wr_list = NULL, *wr = NULL;
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mca_btl_openib_module_t *openib_btl = ep->endpoint_btl;
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if(0 == num_post)
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return OMPI_SUCCESS;
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for(i = 0; i < num_post; i++) {
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int rc;
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ompi_free_list_item_t* item;
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OMPI_FREE_LIST_WAIT(&openib_btl->hca->qps[qp].recv_free, item, rc);
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to_base_frag(item)->base.order = qp;
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to_com_frag(item)->endpoint = ep;
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if(NULL == wr)
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wr = wr_list = &to_recv_frag(item)->rd_desc;
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else
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wr = wr->next = &to_recv_frag(item)->rd_desc;
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}
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wr->next = NULL;
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if(!ibv_post_recv(ep->qps[qp].qp->lcl_qp, wr_list, &bad_wr))
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return OMPI_SUCCESS;
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BTL_ERROR(("error posting receive on qp %d\n", qp));
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return OMPI_ERROR;
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}
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static inline int mca_btl_openib_endpoint_post_rr_nolock(
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mca_btl_base_endpoint_t *ep, const int qp)
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{
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int rd_rsv = mca_btl_openib_component.qp_infos[qp].u.pp_qp.rd_rsv;
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int rd_num = mca_btl_openib_component.qp_infos[qp].rd_num;
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int rd_low = mca_btl_openib_component.qp_infos[qp].rd_low;
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int cqp = mca_btl_openib_component.credits_qp, rc;
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int cm_received = 0, num_post = 0;
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assert(BTL_OPENIB_QP_TYPE_PP(qp));
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if(ep->qps[qp].u.pp_qp.rd_posted <= rd_low)
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num_post = rd_num - ep->qps[qp].u.pp_qp.rd_posted;
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assert(num_post >= 0);
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if(ep->qps[qp].u.pp_qp.cm_received >= (rd_rsv >> 2))
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cm_received = ep->qps[qp].u.pp_qp.cm_received;
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if((rc = post_recvs(ep, qp, num_post)) != OMPI_SUCCESS) {
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OPAL_THREAD_UNLOCK(&ep->endpoint_lock);
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return rc;
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}
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OPAL_THREAD_ADD32(&ep->qps[qp].u.pp_qp.rd_posted, num_post);
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OPAL_THREAD_ADD32(&ep->qps[qp].u.pp_qp.rd_credits, num_post);
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/* post buffers for credit management on credit management qp */
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if((rc = post_recvs(ep, cqp, cm_received)) != OMPI_SUCCESS) {
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OPAL_THREAD_UNLOCK(&ep->endpoint_lock);
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return rc;
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}
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OPAL_THREAD_ADD32(&ep->qps[qp].u.pp_qp.cm_return, cm_received);
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OPAL_THREAD_ADD32(&ep->qps[qp].u.pp_qp.cm_received, -cm_received);
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assert(ep->qps[qp].u.pp_qp.rd_credits <= rd_num &&
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ep->qps[qp].u.pp_qp.rd_credits >= 0);
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return OMPI_SUCCESS;
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}
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static inline int mca_btl_openib_endpoint_post_rr(
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mca_btl_base_endpoint_t *ep, const int qp)
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{
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int ret;
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OPAL_THREAD_LOCK(&ep->endpoint_lock);
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ret = mca_btl_openib_endpoint_post_rr_nolock(ep, qp);
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OPAL_THREAD_UNLOCK(&ep->endpoint_lock);
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return ret;
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}
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#define BTL_OPENIB_CREDITS_SEND_TRYLOCK(E, Q) \
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OPAL_ATOMIC_CMPSET_32(&(E)->qps[(Q)].rd_credit_send_lock, 0, 1)
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#define BTL_OPENIB_CREDITS_SEND_UNLOCK(E, Q) \
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OPAL_ATOMIC_CMPSET_32(&(E)->qps[(Q)].rd_credit_send_lock, 1, 0)
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static inline bool check_eager_rdma_credits(const mca_btl_openib_endpoint_t *ep)
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{
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return (ep->eager_rdma_local.credits > ep->eager_rdma_local.rd_win) ? true :
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false;
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}
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static inline bool
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check_send_credits(const mca_btl_openib_endpoint_t *ep, const int qp)
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{
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if(!BTL_OPENIB_QP_TYPE_PP(qp))
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return false;
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return (ep->qps[qp].u.pp_qp.rd_credits >=
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mca_btl_openib_component.qp_infos[qp].u.pp_qp.rd_win) ? true : false;
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}
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static inline void send_credits(mca_btl_openib_endpoint_t *ep, int qp)
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{
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if(BTL_OPENIB_QP_TYPE_PP(qp)) {
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if(check_send_credits(ep, qp))
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goto try_send;
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} else {
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qp = mca_btl_openib_component.credits_qp;
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}
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if(!check_eager_rdma_credits(ep))
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return;
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try_send:
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if(BTL_OPENIB_CREDITS_SEND_TRYLOCK(ep, qp))
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mca_btl_openib_endpoint_send_credits(ep, qp);
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}
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static inline int check_endpoint_state(mca_btl_openib_endpoint_t *ep,
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mca_btl_base_descriptor_t *des, opal_list_t *pending_list)
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{
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int rc = ORTE_ERR_RESOURCE_BUSY;
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switch(ep->endpoint_state) {
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case MCA_BTL_IB_CLOSED:
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rc = ompi_btl_openib_connect.bcf_start_connect(ep);
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if(rc == OMPI_SUCCESS)
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rc = ORTE_ERR_RESOURCE_BUSY;
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/*
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* As long as we expect a message from the peer (in order
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* to setup the connection) let the event engine pool the
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* OOB events. Note: we increment it once peer active
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* connection.
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*/
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opal_progress_event_users_increment();
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/* fall through */
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default:
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opal_list_append(pending_list, (opal_list_item_t *)des);
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break;
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case MCA_BTL_IB_FAILED:
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rc = OMPI_ERR_UNREACH;
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break;
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case MCA_BTL_IB_CONNECTED:
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rc = OMPI_SUCCESS;
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break;
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}
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return rc;
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}
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static inline __opal_attribute_always_inline__ int
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ib_send_flags(uint32_t size, mca_btl_openib_endpoint_t *ep)
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{
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return IBV_SEND_SIGNALED |
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((size <= ep->endpoint_btl->ib_inline_max) ? IBV_SEND_INLINE : 0);
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}
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END_C_DECLS
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#endif
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