476 строки
18 KiB
C
476 строки
18 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) 2004-2010 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) 2009 Sun Microsystems, Inc. All rights reserved.
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* Copyright (c) 2011 NVIDIA Corporation. 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 OMPI_PML_OB1_SEND_REQUEST_H
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#define OMPI_PML_OB1_SEND_REQUEST_H
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#include "ompi/mca/btl/btl.h"
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#include "ompi/mca/pml/base/pml_base_sendreq.h"
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#include "ompi/mca/mpool/base/base.h"
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#include "pml_ob1_comm.h"
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#include "pml_ob1_hdr.h"
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#include "pml_ob1_rdma.h"
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#include "pml_ob1_rdmafrag.h"
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#include "opal/datatype/opal_convertor.h"
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#include "ompi/mca/bml/bml.h"
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BEGIN_C_DECLS
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typedef enum {
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MCA_PML_OB1_SEND_PENDING_NONE,
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MCA_PML_OB1_SEND_PENDING_SCHEDULE,
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MCA_PML_OB1_SEND_PENDING_START
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} mca_pml_ob1_send_pending_t;
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struct mca_pml_ob1_send_request_t {
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mca_pml_base_send_request_t req_send;
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mca_bml_base_endpoint_t* req_endpoint;
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ompi_ptr_t req_recv;
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int32_t req_state;
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int32_t req_lock;
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bool req_throttle_sends;
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size_t req_pipeline_depth;
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size_t req_bytes_delivered;
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uint32_t req_rdma_cnt;
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mca_pml_ob1_send_pending_t req_pending;
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opal_mutex_t req_send_range_lock;
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opal_list_t req_send_ranges;
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mca_pml_ob1_com_btl_t req_rdma[1];
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};
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typedef struct mca_pml_ob1_send_request_t mca_pml_ob1_send_request_t;
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OBJ_CLASS_DECLARATION(mca_pml_ob1_send_request_t);
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struct mca_pml_ob1_send_range_t {
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ompi_free_list_item_t base;
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uint64_t range_send_offset;
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uint64_t range_send_length;
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int range_btl_idx;
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int range_btl_cnt;
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mca_pml_ob1_com_btl_t range_btls[1];
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};
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typedef struct mca_pml_ob1_send_range_t mca_pml_ob1_send_range_t;
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OBJ_CLASS_DECLARATION(mca_pml_ob1_send_range_t);
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static inline bool lock_send_request(mca_pml_ob1_send_request_t *sendreq)
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{
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return OPAL_THREAD_ADD32(&sendreq->req_lock, 1) == 1;
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}
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static inline bool unlock_send_request(mca_pml_ob1_send_request_t *sendreq)
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{
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return OPAL_THREAD_ADD32(&sendreq->req_lock, -1) == 0;
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}
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static inline void
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add_request_to_send_pending(mca_pml_ob1_send_request_t* sendreq,
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const mca_pml_ob1_send_pending_t type,
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const bool append)
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{
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opal_list_item_t *item = (opal_list_item_t*)sendreq;
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OPAL_THREAD_LOCK(&mca_pml_ob1.lock);
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sendreq->req_pending = type;
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if(append)
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opal_list_append(&mca_pml_ob1.send_pending, item);
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else
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opal_list_prepend(&mca_pml_ob1.send_pending, item);
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OPAL_THREAD_UNLOCK(&mca_pml_ob1.lock);
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}
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static inline mca_pml_ob1_send_request_t*
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get_request_from_send_pending(mca_pml_ob1_send_pending_t *type)
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{
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mca_pml_ob1_send_request_t *sendreq;
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OPAL_THREAD_LOCK(&mca_pml_ob1.lock);
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sendreq = (mca_pml_ob1_send_request_t*)
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opal_list_remove_first(&mca_pml_ob1.send_pending);
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if(sendreq) {
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*type = sendreq->req_pending;
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sendreq->req_pending = MCA_PML_OB1_SEND_PENDING_NONE;
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}
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OPAL_THREAD_UNLOCK(&mca_pml_ob1.lock);
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return sendreq;
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}
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#define MCA_PML_OB1_SEND_REQUEST_ALLOC( comm, \
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dst, \
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sendreq, \
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rc) \
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{ \
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ompi_proc_t *proc = ompi_comm_peer_lookup( comm, dst ); \
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ompi_free_list_item_t* item; \
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\
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rc = OMPI_ERR_OUT_OF_RESOURCE; \
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if( OPAL_LIKELY(NULL != proc) ) { \
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rc = OMPI_SUCCESS; \
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OMPI_FREE_LIST_WAIT(&mca_pml_base_send_requests, item, rc); \
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sendreq = (mca_pml_ob1_send_request_t*)item; \
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sendreq->req_send.req_base.req_proc = proc; \
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} \
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}
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#define MCA_PML_OB1_SEND_REQUEST_INIT( sendreq, \
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buf, \
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count, \
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datatype, \
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dst, \
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tag, \
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comm, \
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sendmode, \
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persistent) \
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{ \
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MCA_PML_BASE_SEND_REQUEST_INIT(&sendreq->req_send, \
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buf, \
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count, \
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datatype, \
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dst, \
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tag, \
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comm, \
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sendmode, \
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persistent, \
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0); /* convertor_flags */ \
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(sendreq)->req_recv.pval = NULL; \
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}
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static inline void mca_pml_ob1_free_rdma_resources(mca_pml_ob1_send_request_t* sendreq)
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{
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size_t r;
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/* return mpool resources */
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for(r = 0; r < sendreq->req_rdma_cnt; r++) {
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mca_mpool_base_registration_t* reg = sendreq->req_rdma[r].btl_reg;
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if( NULL != reg && reg->mpool != NULL ) {
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reg->mpool->mpool_deregister(reg->mpool, reg);
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}
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}
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sendreq->req_rdma_cnt = 0;
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}
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/**
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* Start a send request.
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*/
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#define MCA_PML_OB1_SEND_REQUEST_START(sendreq, rc) \
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do { \
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rc = mca_pml_ob1_send_request_start(sendreq); \
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} while (0)
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/*
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* Mark a send request as completed at the MPI level.
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*/
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#define MCA_PML_OB1_SEND_REQUEST_MPI_COMPLETE(sendreq, with_signal) \
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do { \
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(sendreq)->req_send.req_base.req_ompi.req_status.MPI_SOURCE = \
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(sendreq)->req_send.req_base.req_comm->c_my_rank; \
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(sendreq)->req_send.req_base.req_ompi.req_status.MPI_TAG = \
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(sendreq)->req_send.req_base.req_tag; \
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(sendreq)->req_send.req_base.req_ompi.req_status.MPI_ERROR = OMPI_SUCCESS; \
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(sendreq)->req_send.req_base.req_ompi.req_status._ucount = \
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(sendreq)->req_send.req_bytes_packed; \
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ompi_request_complete( &((sendreq)->req_send.req_base.req_ompi), (with_signal) ); \
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\
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PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_COMPLETE, \
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&(sendreq->req_send.req_base), PERUSE_SEND); \
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} while(0)
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/*
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* Release resources associated with a request
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*/
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#define MCA_PML_OB1_SEND_REQUEST_RETURN(sendreq) \
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do { \
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/* Let the base handle the reference counts */ \
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MCA_PML_BASE_SEND_REQUEST_FINI((&(sendreq)->req_send)); \
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OMPI_FREE_LIST_RETURN( &mca_pml_base_send_requests, \
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(ompi_free_list_item_t*)sendreq); \
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} while(0)
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/*
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* The PML has completed a send request. Note that this request
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* may have been orphaned by the user or have already completed
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* at the MPI level.
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* This function will never be called directly from the upper level, as it
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* should only be an internal call to the PML.
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*
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*/
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static inline void
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send_request_pml_complete(mca_pml_ob1_send_request_t *sendreq)
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{
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assert(false == sendreq->req_send.req_base.req_pml_complete);
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if(sendreq->req_send.req_bytes_packed > 0) {
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PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_XFER_END,
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&(sendreq->req_send.req_base), PERUSE_SEND);
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}
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/* return mpool resources */
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mca_pml_ob1_free_rdma_resources(sendreq);
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if (sendreq->req_send.req_send_mode == MCA_PML_BASE_SEND_BUFFERED &&
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sendreq->req_send.req_addr != sendreq->req_send.req_base.req_addr) {
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mca_pml_base_bsend_request_fini((ompi_request_t*)sendreq);
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}
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OPAL_THREAD_LOCK(&ompi_request_lock);
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if(false == sendreq->req_send.req_base.req_ompi.req_complete) {
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/* Should only be called for long messages (maybe synchronous) */
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MCA_PML_OB1_SEND_REQUEST_MPI_COMPLETE(sendreq, true);
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}
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sendreq->req_send.req_base.req_pml_complete = true;
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if(sendreq->req_send.req_base.req_free_called) {
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MCA_PML_OB1_SEND_REQUEST_RETURN(sendreq);
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}
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OPAL_THREAD_UNLOCK(&ompi_request_lock);
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}
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/* returns true if request was completed on PML level */
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static inline bool
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send_request_pml_complete_check(mca_pml_ob1_send_request_t *sendreq)
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{
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#if OPAL_ENABLE_MULTI_THREADS
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opal_atomic_rmb();
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#endif
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/* if no more events are expected for the request and the whole message is
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* already sent and send fragment scheduling isn't running in another
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* thread then complete the request on PML level. From now on, if user
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* called free on this request, the request structure can be reused for
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* another request or if the request is persistent it can be restarted */
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if(sendreq->req_state == 0 &&
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sendreq->req_bytes_delivered >= sendreq->req_send.req_bytes_packed
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&& lock_send_request(sendreq)) {
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send_request_pml_complete(sendreq);
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return true;
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}
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return false;
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}
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/**
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* Schedule additional fragments
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*/
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int
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mca_pml_ob1_send_request_schedule_once(mca_pml_ob1_send_request_t*);
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static inline int
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mca_pml_ob1_send_request_schedule_exclusive(mca_pml_ob1_send_request_t* sendreq)
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{
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int rc;
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do {
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rc = mca_pml_ob1_send_request_schedule_once(sendreq);
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if(OPAL_SOS_GET_ERROR_CODE(rc) == OMPI_ERR_OUT_OF_RESOURCE)
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break;
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} while(!unlock_send_request(sendreq));
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if(OMPI_SUCCESS == rc)
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send_request_pml_complete_check(sendreq);
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return rc;
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}
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static inline void
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mca_pml_ob1_send_request_schedule(mca_pml_ob1_send_request_t* sendreq)
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{
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/*
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* Only allow one thread in this routine for a given request.
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* However, we cannot block callers on a mutex, so simply keep track
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* of the number of times the routine has been called and run through
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* the scheduling logic once for every call.
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*/
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if(!lock_send_request(sendreq))
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return;
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mca_pml_ob1_send_request_schedule_exclusive(sendreq);
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}
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/**
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* Start the specified request
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*/
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int mca_pml_ob1_send_request_start_buffered(
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mca_pml_ob1_send_request_t* sendreq,
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mca_bml_base_btl_t* bml_btl,
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size_t size);
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int mca_pml_ob1_send_request_start_copy(
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mca_pml_ob1_send_request_t* sendreq,
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mca_bml_base_btl_t* bml_btl,
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size_t size);
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int mca_pml_ob1_send_request_start_prepare(
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mca_pml_ob1_send_request_t* sendreq,
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mca_bml_base_btl_t* bml_btl,
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size_t size);
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int mca_pml_ob1_send_request_start_rdma(
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mca_pml_ob1_send_request_t* sendreq,
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mca_bml_base_btl_t* bml_btl,
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size_t size);
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int mca_pml_ob1_send_request_start_rndv(
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mca_pml_ob1_send_request_t* sendreq,
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mca_bml_base_btl_t* bml_btl,
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size_t size,
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int flags);
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static inline int
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mca_pml_ob1_send_request_start_btl( mca_pml_ob1_send_request_t* sendreq,
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mca_bml_base_btl_t* bml_btl )
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{
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size_t size = sendreq->req_send.req_bytes_packed;
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mca_btl_base_module_t* btl = bml_btl->btl;
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size_t eager_limit = btl->btl_eager_limit - sizeof(mca_pml_ob1_hdr_t);
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int rc;
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if( OPAL_LIKELY(size <= eager_limit) ) {
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switch(sendreq->req_send.req_send_mode) {
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case MCA_PML_BASE_SEND_SYNCHRONOUS:
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rc = mca_pml_ob1_send_request_start_rndv(sendreq, bml_btl, size, 0);
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break;
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case MCA_PML_BASE_SEND_BUFFERED:
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rc = mca_pml_ob1_send_request_start_copy(sendreq, bml_btl, size);
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break;
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case MCA_PML_BASE_SEND_COMPLETE:
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rc = mca_pml_ob1_send_request_start_prepare(sendreq, bml_btl, size);
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break;
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default:
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if (size != 0 && bml_btl->btl_flags & MCA_BTL_FLAGS_SEND_INPLACE) {
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rc = mca_pml_ob1_send_request_start_prepare(sendreq, bml_btl, size);
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} else {
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rc = mca_pml_ob1_send_request_start_copy(sendreq, bml_btl, size);
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}
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break;
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}
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} else {
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size = eager_limit;
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if(OPAL_UNLIKELY(btl->btl_rndv_eager_limit < eager_limit))
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size = btl->btl_rndv_eager_limit;
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if(sendreq->req_send.req_send_mode == MCA_PML_BASE_SEND_BUFFERED) {
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rc = mca_pml_ob1_send_request_start_buffered(sendreq, bml_btl, size);
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} else if
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(opal_convertor_need_buffers(&sendreq->req_send.req_base.req_convertor) == false) {
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unsigned char *base;
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opal_convertor_get_current_pointer( &sendreq->req_send.req_base.req_convertor, (void**)&base );
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if( 0 != (sendreq->req_rdma_cnt = (uint32_t)mca_pml_ob1_rdma_btls(
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sendreq->req_endpoint,
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base,
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sendreq->req_send.req_bytes_packed,
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sendreq->req_rdma))) {
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rc = mca_pml_ob1_send_request_start_rdma(sendreq, bml_btl,
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sendreq->req_send.req_bytes_packed);
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if( OPAL_UNLIKELY(OMPI_SUCCESS != rc) ) {
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mca_pml_ob1_free_rdma_resources(sendreq);
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}
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} else {
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rc = mca_pml_ob1_send_request_start_rndv(sendreq, bml_btl, size,
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MCA_PML_OB1_HDR_FLAGS_CONTIG);
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}
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} else {
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#if OPAL_CUDA_SUPPORT
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/* Do not send anything with first rendezvous message as copying GPU
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* memory into RNDV message is expensive. */
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if (sendreq->req_send.req_base.req_convertor.flags & CONVERTOR_CUDA) {
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size = 0;
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}
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#endif
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rc = mca_pml_ob1_send_request_start_rndv(sendreq, bml_btl, size, 0);
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}
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}
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return rc;
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}
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static inline int
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mca_pml_ob1_send_request_start( mca_pml_ob1_send_request_t* sendreq )
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{
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mca_pml_ob1_comm_t* comm = sendreq->req_send.req_base.req_comm->c_pml_comm;
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mca_bml_base_endpoint_t* endpoint = (mca_bml_base_endpoint_t*)
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sendreq->req_send.req_base.req_proc->proc_bml;
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size_t i;
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if( OPAL_UNLIKELY(endpoint == NULL) ) {
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return OMPI_ERR_UNREACH;
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}
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sendreq->req_endpoint = endpoint;
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sendreq->req_state = 0;
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sendreq->req_lock = 0;
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sendreq->req_pipeline_depth = 0;
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sendreq->req_bytes_delivered = 0;
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sendreq->req_pending = MCA_PML_OB1_SEND_PENDING_NONE;
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sendreq->req_send.req_base.req_sequence = OPAL_THREAD_ADD32(
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&comm->procs[sendreq->req_send.req_base.req_peer].send_sequence,1);
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MCA_PML_BASE_SEND_START( &sendreq->req_send.req_base );
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for(i = 0; i < mca_bml_base_btl_array_get_size(&endpoint->btl_eager); i++) {
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mca_bml_base_btl_t* bml_btl;
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int rc;
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/* select a btl */
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bml_btl = mca_bml_base_btl_array_get_next(&endpoint->btl_eager);
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rc = mca_pml_ob1_send_request_start_btl(sendreq, bml_btl);
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if( OPAL_LIKELY(OMPI_ERR_OUT_OF_RESOURCE != OPAL_SOS_GET_ERROR_CODE(rc)) )
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return rc;
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}
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add_request_to_send_pending(sendreq, MCA_PML_OB1_SEND_PENDING_START, true);
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return OMPI_SUCCESS;
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}
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/**
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* Initiate a put scheduled by the receiver.
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*/
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|
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void mca_pml_ob1_send_request_put( mca_pml_ob1_send_request_t* sendreq,
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mca_btl_base_module_t* btl,
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mca_pml_ob1_rdma_hdr_t* hdr );
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|
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int mca_pml_ob1_send_request_put_frag(mca_pml_ob1_rdma_frag_t* frag);
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|
|
|
/* This function tries to continue sendreq that was stuck because of resource
|
|
* unavailability. A sendreq may be added to send_pending list if there is no
|
|
* resource to send initial packet or there is not resource to schedule data
|
|
* for sending. The reason the sendreq was added to the list is stored inside
|
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* sendreq struct and appropriate operation is retried when resource became
|
|
* available. bml_btl passed to the function doesn't represents sendreq
|
|
* destination, it represents BTL on which resource was freed, so only this BTL
|
|
* should be considered for sending packets */
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|
void mca_pml_ob1_send_request_process_pending(mca_bml_base_btl_t *bml_btl);
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|
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|
void mca_pml_ob1_send_request_copy_in_out(mca_pml_ob1_send_request_t *sendreq,
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uint64_t send_offset, uint64_t send_length);
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END_C_DECLS
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#endif /* OMPI_PML_OB1_SEND_REQUEST_H */
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