552c9ca5a0
WHAT: Open our low-level communication infrastructure by moving all necessary components (btl/rcache/allocator/mpool) down in OPAL All the components required for inter-process communications are currently deeply integrated in the OMPI layer. Several groups/institutions have express interest in having a more generic communication infrastructure, without all the OMPI layer dependencies. This communication layer should be made available at a different software level, available to all layers in the Open MPI software stack. As an example, our ORTE layer could replace the current OOB and instead use the BTL directly, gaining access to more reactive network interfaces than TCP. Similarly, external software libraries could take advantage of our highly optimized AM (active message) communication layer for their own purpose. UTK with support from Sandia, developped a version of Open MPI where the entire communication infrastucture has been moved down to OPAL (btl/rcache/allocator/mpool). Most of the moved components have been updated to match the new schema, with few exceptions (mainly BTLs where I have no way of compiling/testing them). Thus, the completion of this RFC is tied to being able to completing this move for all BTLs. For this we need help from the rest of the Open MPI community, especially those supporting some of the BTLs. A non-exhaustive list of BTLs that qualify here is: mx, portals4, scif, udapl, ugni, usnic. This commit was SVN r32317.
450 строки
18 KiB
C
450 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) 2004-2014 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) 2004-2007 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) 2008 UT-Battelle, LLC. All rights reserved.
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* Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2011-2012 Los Alamos National Security, LLC.
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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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/**
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* @file
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*/
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#ifndef OMPI_PML_BFO_RECV_REQUEST_H
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#define OMPI_PML_BFO_RECV_REQUEST_H
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#include "pml_bfo.h"
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#include "pml_bfo_rdma.h"
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#include "pml_bfo_rdmafrag.h"
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#include "ompi/proc/proc.h"
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#include "ompi/mca/pml/bfo/pml_bfo_comm.h"
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#include "opal/mca/mpool/base/base.h"
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#include "ompi/mca/pml/base/pml_base_recvreq.h"
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#if PML_BFO
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#define RECVREQ_RECVERRSENT 0x01
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#define RECVREQ_RNDVRESTART_RECVED 0x02
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#define RECVREQ_RNDVRESTART_ACKED 0x04
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#endif /* PML_BFO */
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BEGIN_C_DECLS
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struct mca_pml_bfo_recv_request_t {
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mca_pml_base_recv_request_t req_recv;
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opal_ptr_t remote_req_send;
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#if PML_BFO
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int32_t req_msgseq; /* PML sequence number */
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int32_t req_events; /* number of outstanding events on request */
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int32_t req_restartseq; /* sequence number of restarted request */
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int32_t req_errstate; /* state of request if in error */
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#endif /* PML_BFO */
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int32_t req_lock;
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size_t req_pipeline_depth;
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size_t req_bytes_received; /**< amount of data transferred into the user buffer */
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size_t req_bytes_expected; /**< local size of the data as suggested by the user */
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size_t req_rdma_offset;
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size_t req_send_offset;
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uint32_t req_rdma_cnt;
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uint32_t req_rdma_idx;
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bool req_pending;
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bool req_ack_sent; /**< whether ack was sent to the sender */
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bool req_match_received; /**< Prevent request to be completed prematurely */
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opal_mutex_t lock;
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mca_pml_bfo_com_btl_t req_rdma[1];
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};
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typedef struct mca_pml_bfo_recv_request_t mca_pml_bfo_recv_request_t;
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OBJ_CLASS_DECLARATION(mca_pml_bfo_recv_request_t);
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static inline bool lock_recv_request(mca_pml_bfo_recv_request_t *recvreq)
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{
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return OPAL_THREAD_ADD32(&recvreq->req_lock, 1) == 1;
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}
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static inline bool unlock_recv_request(mca_pml_bfo_recv_request_t *recvreq)
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{
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return OPAL_THREAD_ADD32(&recvreq->req_lock, -1) == 0;
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}
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/**
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* Allocate a recv request from the modules free list.
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*
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* @param rc (OUT) OMPI_SUCCESS or error status on failure.
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* @return Receive request.
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*/
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#define MCA_PML_BFO_RECV_REQUEST_ALLOC(recvreq) \
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do { \
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ompi_free_list_item_t* item; \
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OMPI_FREE_LIST_GET_MT(&mca_pml_base_recv_requests, item); \
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recvreq = (mca_pml_bfo_recv_request_t*)item; \
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} while(0)
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/**
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* Initialize a receive request with call parameters.
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*
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* @param request (IN) Receive request.
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* @param addr (IN) User buffer.
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* @param count (IN) Number of elements of indicated datatype.
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* @param datatype (IN) User defined datatype.
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* @param src (IN) Source rank w/in the communicator.
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* @param tag (IN) User defined tag.
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* @param comm (IN) Communicator.
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* @param persistent (IN) Is this a ersistent request.
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*/
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#define MCA_PML_BFO_RECV_REQUEST_INIT( request, \
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addr, \
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count, \
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datatype, \
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src, \
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tag, \
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comm, \
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persistent) \
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do { \
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MCA_PML_BASE_RECV_REQUEST_INIT( &(request)->req_recv, \
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addr, \
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count, \
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datatype, \
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src, \
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tag, \
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comm, \
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persistent); \
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} while(0)
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/**
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* Mark the request as completed at MPI level for internal purposes.
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*
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* @param recvreq (IN) Receive request.
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*/
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#define MCA_PML_BFO_RECV_REQUEST_MPI_COMPLETE( recvreq ) \
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do { \
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PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_COMPLETE, \
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&(recvreq->req_recv.req_base), PERUSE_RECV ); \
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ompi_request_complete( &(recvreq->req_recv.req_base.req_ompi), true ); \
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} while (0)
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/*
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* Free the PML receive request
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*/
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#define MCA_PML_BFO_RECV_REQUEST_RETURN(recvreq) \
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{ \
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MCA_PML_BASE_RECV_REQUEST_FINI(&(recvreq)->req_recv); \
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OMPI_FREE_LIST_RETURN_MT( &mca_pml_base_recv_requests, \
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(ompi_free_list_item_t*)(recvreq)); \
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}
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/**
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* Complete receive request. Request structure cannot be accessed after calling
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* this function any more.
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*
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* @param recvreq (IN) Receive request.
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*/
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static inline void
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recv_request_pml_complete(mca_pml_bfo_recv_request_t *recvreq)
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{
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size_t i;
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assert(false == recvreq->req_recv.req_base.req_pml_complete);
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if(recvreq->req_recv.req_bytes_packed > 0) {
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PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_XFER_END,
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&recvreq->req_recv.req_base, PERUSE_RECV );
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}
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for(i = 0; i < recvreq->req_rdma_cnt; i++) {
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mca_mpool_base_registration_t* btl_reg = recvreq->req_rdma[i].btl_reg;
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if( NULL != btl_reg && btl_reg->mpool != NULL) {
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btl_reg->mpool->mpool_deregister( btl_reg->mpool, btl_reg );
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}
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}
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recvreq->req_rdma_cnt = 0;
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#if PML_BFO
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recvreq->req_msgseq -= 100;
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#endif /* PML_BFO */
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OPAL_THREAD_LOCK(&ompi_request_lock);
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if(true == recvreq->req_recv.req_base.req_free_called) {
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if( MPI_SUCCESS != recvreq->req_recv.req_base.req_ompi.req_status.MPI_ERROR ) {
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ompi_mpi_abort(&ompi_mpi_comm_world.comm, MPI_ERR_REQUEST);
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}
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MCA_PML_BFO_RECV_REQUEST_RETURN(recvreq);
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} else {
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/* initialize request status */
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recvreq->req_recv.req_base.req_pml_complete = true;
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recvreq->req_recv.req_base.req_ompi.req_status._ucount =
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recvreq->req_bytes_received;
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if (recvreq->req_recv.req_bytes_packed > recvreq->req_bytes_expected) {
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recvreq->req_recv.req_base.req_ompi.req_status._ucount =
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recvreq->req_recv.req_bytes_packed;
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recvreq->req_recv.req_base.req_ompi.req_status.MPI_ERROR =
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MPI_ERR_TRUNCATE;
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}
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MCA_PML_BFO_RECV_REQUEST_MPI_COMPLETE(recvreq);
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}
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OPAL_THREAD_UNLOCK(&ompi_request_lock);
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}
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static inline bool
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recv_request_pml_complete_check(mca_pml_bfo_recv_request_t *recvreq)
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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(recvreq->req_match_received &&
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recvreq->req_bytes_received >= recvreq->req_recv.req_bytes_packed &&
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#if PML_BFO
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(0 == recvreq->req_events) && lock_recv_request(recvreq)) {
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#else /* PML_BFO */
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lock_recv_request(recvreq)) {
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#endif /* PML_BFO */
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recv_request_pml_complete(recvreq);
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return true;
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}
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return false;
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}
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extern void mca_pml_bfo_recv_req_start(mca_pml_bfo_recv_request_t *req);
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#define MCA_PML_BFO_RECV_REQUEST_START(r) mca_pml_bfo_recv_req_start(r)
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static inline void prepare_recv_req_converter(mca_pml_bfo_recv_request_t *req)
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{
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if( req->req_recv.req_base.req_datatype->super.size | req->req_recv.req_base.req_count ) {
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opal_convertor_copy_and_prepare_for_recv(
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req->req_recv.req_base.req_proc->super.proc_convertor,
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&(req->req_recv.req_base.req_datatype->super),
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req->req_recv.req_base.req_count,
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req->req_recv.req_base.req_addr,
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0,
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&req->req_recv.req_base.req_convertor);
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opal_convertor_get_unpacked_size(&req->req_recv.req_base.req_convertor,
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&req->req_bytes_expected);
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}
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}
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#define MCA_PML_BFO_RECV_REQUEST_MATCHED(request, hdr) \
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recv_req_matched(request, hdr)
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static inline void recv_req_matched(mca_pml_bfo_recv_request_t *req,
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mca_pml_bfo_match_hdr_t *hdr)
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{
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req->req_recv.req_base.req_ompi.req_status.MPI_SOURCE = hdr->hdr_src;
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req->req_recv.req_base.req_ompi.req_status.MPI_TAG = hdr->hdr_tag;
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req->req_match_received = true;
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#if PML_BFO
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req->req_msgseq = hdr->hdr_seq;
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#endif /* PML_BFO */
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#if OPAL_ENABLE_MULTI_THREADS
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opal_atomic_wmb();
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#endif
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if(req->req_recv.req_bytes_packed > 0) {
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#if OPAL_ENABLE_HETEROGENEOUS_SUPPORT
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if(MPI_ANY_SOURCE == req->req_recv.req_base.req_peer) {
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/* non wildcard prepared during post recv */
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prepare_recv_req_converter(req);
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}
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#endif /* OPAL_ENABLE_HETEROGENEOUS_SUPPORT */
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PERUSE_TRACE_COMM_EVENT(PERUSE_COMM_REQ_XFER_BEGIN,
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&req->req_recv.req_base, PERUSE_RECV);
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}
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}
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/**
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*
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*/
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#define MCA_PML_BFO_RECV_REQUEST_UNPACK( request, \
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segments, \
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num_segments, \
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seg_offset, \
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data_offset, \
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bytes_received, \
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bytes_delivered) \
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do { \
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bytes_delivered = 0; \
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if(request->req_recv.req_bytes_packed > 0) { \
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struct iovec iov[MCA_BTL_DES_MAX_SEGMENTS]; \
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uint32_t iov_count = 0; \
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size_t max_data = bytes_received; \
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size_t n, offset = seg_offset; \
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mca_btl_base_segment_t* segment = segments; \
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\
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OPAL_THREAD_LOCK(&request->lock); \
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for( n = 0; n < num_segments; n++, segment++ ) { \
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if(offset >= segment->seg_len) { \
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offset -= segment->seg_len; \
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} else { \
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iov[iov_count].iov_len = segment->seg_len - offset; \
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iov[iov_count].iov_base = (IOVBASE_TYPE*) \
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((unsigned char*)segment->seg_addr.pval + offset); \
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iov_count++; \
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offset = 0; \
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} \
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} \
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PERUSE_TRACE_COMM_OMPI_EVENT (PERUSE_COMM_REQ_XFER_CONTINUE, \
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&(recvreq->req_recv.req_base), max_data, \
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PERUSE_RECV); \
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opal_convertor_set_position( &(request->req_recv.req_base.req_convertor), \
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&data_offset ); \
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opal_convertor_unpack( &(request)->req_recv.req_base.req_convertor, \
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iov, \
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&iov_count, \
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&max_data ); \
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bytes_delivered = max_data; \
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OPAL_THREAD_UNLOCK(&request->lock); \
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} \
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} while (0)
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/**
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*
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*/
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void mca_pml_bfo_recv_request_progress_match(
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mca_pml_bfo_recv_request_t* req,
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struct mca_btl_base_module_t* btl,
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mca_btl_base_segment_t* segments,
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size_t num_segments);
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/**
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*
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*/
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void mca_pml_bfo_recv_request_progress_frag(
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mca_pml_bfo_recv_request_t* req,
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struct mca_btl_base_module_t* btl,
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mca_btl_base_segment_t* segments,
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size_t num_segments);
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/**
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*
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*/
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void mca_pml_bfo_recv_request_progress_rndv(
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mca_pml_bfo_recv_request_t* req,
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struct mca_btl_base_module_t* btl,
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mca_btl_base_segment_t* segments,
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size_t num_segments);
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/**
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*
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*/
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void mca_pml_bfo_recv_request_progress_rget(
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mca_pml_bfo_recv_request_t* req,
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struct mca_btl_base_module_t* btl,
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mca_btl_base_segment_t* segments,
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size_t num_segments);
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/**
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*
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*/
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void mca_pml_bfo_recv_request_matched_probe(
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mca_pml_bfo_recv_request_t* req,
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struct mca_btl_base_module_t* btl,
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mca_btl_base_segment_t* segments,
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size_t num_segments);
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/**
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*
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*/
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int mca_pml_bfo_recv_request_schedule_once(
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mca_pml_bfo_recv_request_t* req, mca_bml_base_btl_t* start_bml_btl);
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static inline int mca_pml_bfo_recv_request_schedule_exclusive(
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mca_pml_bfo_recv_request_t* req,
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mca_bml_base_btl_t* start_bml_btl)
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{
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int rc;
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do {
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rc = mca_pml_bfo_recv_request_schedule_once(req, start_bml_btl);
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if(rc == OMPI_ERR_OUT_OF_RESOURCE)
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break;
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} while(!unlock_recv_request(req));
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if(OMPI_SUCCESS == rc)
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recv_request_pml_complete_check(req);
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return rc;
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}
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static inline void mca_pml_bfo_recv_request_schedule(
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mca_pml_bfo_recv_request_t* req,
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mca_bml_base_btl_t* start_bml_btl)
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{
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if(!lock_recv_request(req))
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return;
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(void)mca_pml_bfo_recv_request_schedule_exclusive(req, start_bml_btl);
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}
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#define MCA_PML_BFO_ADD_ACK_TO_PENDING(P, S, D, O) \
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do { \
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mca_pml_bfo_pckt_pending_t *_pckt; \
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\
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MCA_PML_BFO_PCKT_PENDING_ALLOC(_pckt); \
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_pckt->hdr.hdr_common.hdr_type = MCA_PML_BFO_HDR_TYPE_ACK; \
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_pckt->hdr.hdr_ack.hdr_src_req.lval = (S); \
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_pckt->hdr.hdr_ack.hdr_dst_req.pval = (D); \
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_pckt->hdr.hdr_ack.hdr_send_offset = (O); \
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_pckt->proc = (P); \
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_pckt->bml_btl = NULL; \
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OPAL_THREAD_LOCK(&mca_pml_bfo.lock); \
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opal_list_append(&mca_pml_bfo.pckt_pending, \
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(opal_list_item_t*)_pckt); \
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OPAL_THREAD_UNLOCK(&mca_pml_bfo.lock); \
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} while(0)
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int mca_pml_bfo_recv_request_ack_send_btl(ompi_proc_t* proc,
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mca_bml_base_btl_t* bml_btl, uint64_t hdr_src_req, void *hdr_dst_req,
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uint64_t hdr_rdma_offset, bool nordma);
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static inline int mca_pml_bfo_recv_request_ack_send(ompi_proc_t* proc,
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uint64_t hdr_src_req, void *hdr_dst_req, uint64_t hdr_send_offset,
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bool nordma)
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{
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size_t i;
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mca_bml_base_btl_t* bml_btl;
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mca_bml_base_endpoint_t* endpoint =
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(mca_bml_base_endpoint_t*)proc->proc_endpoints[OMPI_PROC_ENDPOINT_TAG_BML];
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for(i = 0; i < mca_bml_base_btl_array_get_size(&endpoint->btl_eager); i++) {
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bml_btl = mca_bml_base_btl_array_get_next(&endpoint->btl_eager);
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if(mca_pml_bfo_recv_request_ack_send_btl(proc, bml_btl, hdr_src_req,
|
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hdr_dst_req, hdr_send_offset, nordma) == OMPI_SUCCESS)
|
|
return OMPI_SUCCESS;
|
|
}
|
|
|
|
MCA_PML_BFO_ADD_ACK_TO_PENDING(proc, hdr_src_req, hdr_dst_req,
|
|
hdr_send_offset);
|
|
|
|
return OMPI_ERR_OUT_OF_RESOURCE;
|
|
}
|
|
|
|
int mca_pml_bfo_recv_request_get_frag(mca_pml_bfo_rdma_frag_t* frag);
|
|
|
|
/* This function tries to continue recvreq that stuck due to resource
|
|
* unavailability. Recvreq is added to recv_pending list if scheduling of put
|
|
* operation cannot be accomplished for some reason. */
|
|
void mca_pml_bfo_recv_request_process_pending(void);
|
|
|
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END_C_DECLS
|
|
|
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#endif
|
|
|