cca1616368
UD is the Unreliable Datagram transport for Infiniband, specifically OpenIB. This BTL is derived from the existing openib BTL, which is RC (Reliable Connection) based. Still a work in progress, as there is a lot of work left to do. Specifically, performance, scalability, and flow control need to be addressed. Currently I'm playing around with different methods for handling receive buffers, as well as profiling to figure out where the time is going. This commit was SVN r10271.
150 строки
4.6 KiB
C
150 строки
4.6 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) 2004-2005 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) 2006 Sandia National Laboratories. All rights
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* 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_ud_frag.h"
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#include "btl_ud.h"
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#include <errno.h>
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#include <string.h>
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#include <infiniband/verbs.h>
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#include "ompi/mca/btl/base/btl_base_error.h"
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#include "ompi/mca/mpool/openib/mpool_openib.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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OBJ_CLASS_DECLARATION(mca_btl_ud_endpoint_t);
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struct mca_btl_ud_frag_t;
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struct mca_btl_ud_port_info_t {
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uint16_t subnet;
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};
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typedef struct mca_btl_ud_port_info_t mca_btl_ud_port_info_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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/* 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_ud_endpoint_state_t;
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struct mca_btl_ud_rem_info_t {
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uint32_t rem_qp_num_hp;
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uint32_t rem_qp_num_lp;
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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_hp;
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uint32_t rem_psn_lp;
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/* Remote processes port sequence number (Low and High) */
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uint16_t rem_subnet;
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/* subnet of remote process */
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};
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typedef struct mca_btl_ud_rem_info_t mca_btl_ud_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. Normally connections are established as-needed.
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* The UD BTL is connectionless, so no connection is ever established.
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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_ud_module_t* endpoint_btl;
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/**< BTL instance that created this connection */
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struct mca_btl_ud_proc_t* endpoint_proc;
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/**< proc structure corresponding to endpoint */
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mca_btl_ud_endpoint_state_t endpoint_state;
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/**< current state of the connection */
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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 endpoint */
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mca_btl_ud_rem_info_t rem_info;
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struct ibv_ah* rmt_ah_hp;
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struct ibv_ah* rmt_ah_lp;
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/* Local Address Handle (Low and High) */
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uint16_t subnet; /**< subnet of this endpoint*/
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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_ud_endpoint_t;
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int mca_btl_ud_endpoint_send(mca_btl_base_endpoint_t* endpoint, struct mca_btl_ud_frag_t* frag);
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inline int mca_btl_ud_endpoint_post_send(struct mca_btl_ud_module_t* ud_btl,
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mca_btl_ud_endpoint_t * endpoint,
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struct mca_btl_ud_frag_t * frag);
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int mca_btl_ud_endpoint_connect(mca_btl_base_endpoint_t*);
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void mca_btl_ud_post_recv(void);
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int mca_btl_ud_endpoint_init_qp(
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mca_btl_base_module_t* btl,
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struct ibv_cq* cq,
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#ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ
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struct ibv_srq* srq,
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#endif
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struct ibv_qp** qp,
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uint32_t lcl_psn);
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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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