/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil -*- */ /* * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana * University Research and Technology * Corporation. All rights reserved. * Copyright (c) 2004-2019 The University of Tennessee and The University * of Tennessee Research Foundation. All rights * reserved. * Copyright (c) 2004-2008 High Performance Computing Center Stuttgart, * University of Stuttgart. All rights reserved. * Copyright (c) 2004-2005 The Regents of the University of California. * All rights reserved. * Copyright (c) 2008 UT-Battelle, LLC. All rights reserved. * Copyright (c) 2010 Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2012 NVIDIA Corporation. All rights reserved. * Copyright (c) 2012-2016 Los Alamos National Security, LLC. All rights * reserved. * Copyright (c) 2015 Cisco Systems, Inc. All rights reserved. * Copyright (c) 2016 Research Organization for Information Science * and Technology (RIST). All rights reserved. * Copyright (c) 2018 FUJITSU LIMITED. All rights reserved. * $COPYRIGHT$ * * Additional copyrights may follow * * $HEADER$ */ #include "ompi_config.h" #include "opal/prefetch.h" #include "opal/mca/mpool/mpool.h" #include "ompi/runtime/ompi_spc.h" #include "ompi/constants.h" #include "ompi/mca/pml/pml.h" #include "pml_ob1.h" #include "pml_ob1_hdr.h" #include "pml_ob1_sendreq.h" #include "pml_ob1_rdmafrag.h" #include "pml_ob1_recvreq.h" #include "ompi/mca/bml/base/base.h" #include "ompi/memchecker.h" OBJ_CLASS_INSTANCE(mca_pml_ob1_send_range_t, opal_free_list_item_t, NULL, NULL); void mca_pml_ob1_send_request_process_pending(mca_bml_base_btl_t *bml_btl) { int rc, i, s = opal_list_get_size(&mca_pml_ob1.send_pending); /* advance pending requests */ for(i = 0; i < s; i++) { mca_pml_ob1_send_pending_t pending_type = MCA_PML_OB1_SEND_PENDING_NONE; mca_pml_ob1_send_request_t* sendreq; mca_bml_base_btl_t *send_dst; sendreq = get_request_from_send_pending(&pending_type); if(OPAL_UNLIKELY(NULL == sendreq)) break; switch(pending_type) { case MCA_PML_OB1_SEND_PENDING_SCHEDULE: rc = mca_pml_ob1_send_request_schedule_exclusive(sendreq); if(OMPI_ERR_OUT_OF_RESOURCE == rc) { return; } break; case MCA_PML_OB1_SEND_PENDING_START: send_dst = mca_bml_base_btl_array_find( &sendreq->req_endpoint->btl_eager, bml_btl->btl); if (NULL == send_dst) { /* Put request back onto pending list and try next one. */ add_request_to_send_pending(sendreq, MCA_PML_OB1_SEND_PENDING_START, true); } else { MCA_PML_OB1_SEND_REQUEST_RESET(sendreq); rc = mca_pml_ob1_send_request_start_btl(sendreq, send_dst); if (OMPI_ERR_OUT_OF_RESOURCE == rc) { /* No more resources on this btl so prepend to the pending * list to minimize reordering and give up for now. */ add_request_to_send_pending(sendreq, MCA_PML_OB1_SEND_PENDING_START, false); return; } } break; default: opal_output(0, "[%s:%d] wrong send request type\n", __FILE__, __LINE__); break; } } } /* * The free call mark the final stage in a request life-cycle. Starting from this * point the request is completed at both PML and user level, and can be used * for others p2p communications. Therefore, in the case of the OB1 PML it should * be added to the free request list. */ static int mca_pml_ob1_send_request_free(struct ompi_request_t** request) { mca_pml_ob1_send_request_t* sendreq = *(mca_pml_ob1_send_request_t**)request; if(false == sendreq->req_send.req_base.req_free_called) { sendreq->req_send.req_base.req_free_called = true; PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_NOTIFY, &(sendreq->req_send.req_base), PERUSE_SEND ); if( true == sendreq->req_send.req_base.req_pml_complete ) { /* make buffer defined when the request is compeleted, and before releasing the objects. */ MEMCHECKER( memchecker_call(&opal_memchecker_base_mem_defined, sendreq->req_send.req_base.req_addr, sendreq->req_send.req_base.req_count, sendreq->req_send.req_base.req_datatype); ); MCA_PML_OB1_SEND_REQUEST_RETURN( sendreq ); } *request = MPI_REQUEST_NULL; } return OMPI_SUCCESS; } static int mca_pml_ob1_send_request_cancel(struct ompi_request_t* request, int complete) { /* we dont cancel send requests by now */ return OMPI_SUCCESS; } static void mca_pml_ob1_send_request_construct(mca_pml_ob1_send_request_t* req) { req->req_send.req_base.req_type = MCA_PML_REQUEST_SEND; req->req_send.req_base.req_ompi.req_start = mca_pml_ob1_start; req->req_send.req_base.req_ompi.req_free = mca_pml_ob1_send_request_free; req->req_send.req_base.req_ompi.req_cancel = mca_pml_ob1_send_request_cancel; req->req_rdma_cnt = 0; req->req_throttle_sends = false; req->rdma_frag = NULL; OBJ_CONSTRUCT(&req->req_send_ranges, opal_list_t); OBJ_CONSTRUCT(&req->req_send_range_lock, opal_mutex_t); } static void mca_pml_ob1_send_request_destruct(mca_pml_ob1_send_request_t* req) { OBJ_DESTRUCT(&req->req_send_ranges); OBJ_DESTRUCT(&req->req_send_range_lock); assert( NULL == req->rdma_frag ); } OBJ_CLASS_INSTANCE( mca_pml_ob1_send_request_t, mca_pml_base_send_request_t, mca_pml_ob1_send_request_construct, mca_pml_ob1_send_request_destruct ); /** * Completion of a short message - nothing left to schedule. */ static inline void mca_pml_ob1_match_completion_free_request( mca_bml_base_btl_t* bml_btl, mca_pml_ob1_send_request_t* sendreq ) { if( sendreq->req_send.req_bytes_packed > 0 ) { PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_XFER_BEGIN, &(sendreq->req_send.req_base), PERUSE_SEND ); } /* signal request completion */ send_request_pml_complete(sendreq); /* check for pending requests */ MCA_PML_OB1_PROGRESS_PENDING(bml_btl); } static void mca_pml_ob1_match_completion_free( struct mca_btl_base_module_t* btl, struct mca_btl_base_endpoint_t* ep, struct mca_btl_base_descriptor_t* des, int status ) { mca_pml_ob1_send_request_t* sendreq = (mca_pml_ob1_send_request_t*)des->des_cbdata; mca_bml_base_btl_t* bml_btl = (mca_bml_base_btl_t*) des->des_context; /* check completion status */ if( OPAL_UNLIKELY(OMPI_SUCCESS != status) ) { /* TSW - FIX */ opal_output(0, "%s:%d FATAL", __FILE__, __LINE__); ompi_rte_abort(-1, NULL); } mca_pml_ob1_match_completion_free_request( bml_btl, sendreq ); } static inline void mca_pml_ob1_rndv_completion_request( mca_bml_base_btl_t* bml_btl, mca_pml_ob1_send_request_t* sendreq, size_t req_bytes_delivered ) { if( sendreq->req_send.req_bytes_packed > 0 ) { PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_XFER_BEGIN, &(sendreq->req_send.req_base), PERUSE_SEND ); } OPAL_THREAD_ADD_FETCH_SIZE_T(&sendreq->req_bytes_delivered, req_bytes_delivered); SPC_USER_OR_MPI(sendreq->req_send.req_base.req_ompi.req_status.MPI_TAG, (ompi_spc_value_t)req_bytes_delivered, OMPI_SPC_BYTES_SENT_USER, OMPI_SPC_BYTES_SENT_MPI); /* advance the request */ OPAL_THREAD_ADD_FETCH32(&sendreq->req_state, -1); send_request_pml_complete_check(sendreq); /* check for pending requests */ MCA_PML_OB1_PROGRESS_PENDING(bml_btl); } /* * Completion of the first fragment of a long message that * requires an acknowledgement */ static void mca_pml_ob1_rndv_completion( mca_btl_base_module_t* btl, struct mca_btl_base_endpoint_t* ep, struct mca_btl_base_descriptor_t* des, int status ) { mca_pml_ob1_send_request_t* sendreq = (mca_pml_ob1_send_request_t*)des->des_cbdata; mca_bml_base_btl_t* bml_btl = (mca_bml_base_btl_t*)des->des_context; size_t req_bytes_delivered; /* check completion status */ if( OPAL_UNLIKELY(OMPI_SUCCESS != status) ) { /* TSW - FIX */ opal_output(0, "%s:%d FATAL", __FILE__, __LINE__); ompi_rte_abort(-1, NULL); } /* count bytes of user data actually delivered. As the rndv completion only * happens in one thread, the increase of the req_bytes_delivered does not * have to be atomic. */ req_bytes_delivered = mca_pml_ob1_compute_segment_length_base ((void *) des->des_segments, des->des_segment_count, sizeof(mca_pml_ob1_rendezvous_hdr_t)); mca_pml_ob1_rndv_completion_request( bml_btl, sendreq, req_bytes_delivered ); } /** * Completion of a get request. */ static void mca_pml_ob1_rget_completion (mca_pml_ob1_rdma_frag_t *frag, int64_t rdma_length) { mca_pml_ob1_send_request_t *sendreq = (mca_pml_ob1_send_request_t *) frag->rdma_req; mca_bml_base_btl_t *bml_btl = frag->rdma_bml; size_t frag_remaining; /* count bytes of user data actually delivered and check for request completion */ if (OPAL_LIKELY(0 < rdma_length)) { frag_remaining = OPAL_THREAD_SUB_FETCH_SIZE_T(&frag->rdma_bytes_remaining, (size_t)rdma_length); SPC_USER_OR_MPI(sendreq->req_send.req_base.req_ompi.req_status.MPI_TAG, (ompi_spc_value_t)rdma_length, OMPI_SPC_BYTES_SENT_USER, OMPI_SPC_BYTES_SENT_MPI); if( 0 == frag_remaining ) { /* this frag is now completed. Update the request and be done */ OPAL_THREAD_ADD_FETCH_SIZE_T(&sendreq->req_bytes_delivered, frag->rdma_length); if( sendreq->rdma_frag == frag ) sendreq->rdma_frag = NULL; MCA_PML_OB1_RDMA_FRAG_RETURN(frag); } } send_request_pml_complete_check(sendreq); MCA_PML_OB1_PROGRESS_PENDING(bml_btl); } /** * Completion of a control message - return resources. */ static void mca_pml_ob1_send_ctl_completion( mca_btl_base_module_t* btl, struct mca_btl_base_endpoint_t* ep, struct mca_btl_base_descriptor_t* des, int status ) { mca_bml_base_btl_t* bml_btl = (mca_bml_base_btl_t*) des->des_context; /* check for pending requests */ MCA_PML_OB1_PROGRESS_PENDING(bml_btl); } /** * Completion of additional fragments of a large message - may need * to schedule additional fragments. */ static void mca_pml_ob1_frag_completion( mca_btl_base_module_t* btl, struct mca_btl_base_endpoint_t* ep, struct mca_btl_base_descriptor_t* des, int status ) { mca_pml_ob1_send_request_t* sendreq = (mca_pml_ob1_send_request_t*)des->des_cbdata; mca_bml_base_btl_t* bml_btl = (mca_bml_base_btl_t*) des->des_context; size_t req_bytes_delivered; /* check completion status */ if( OPAL_UNLIKELY(OMPI_SUCCESS != status) ) { /* TSW - FIX */ opal_output(0, "%s:%d FATAL", __FILE__, __LINE__); ompi_rte_abort(-1, NULL); } /* count bytes of user data actually delivered */ req_bytes_delivered = mca_pml_ob1_compute_segment_length_base ((void *) des->des_segments, des->des_segment_count, sizeof(mca_pml_ob1_frag_hdr_t)); OPAL_THREAD_ADD_FETCH32(&sendreq->req_pipeline_depth, -1); OPAL_THREAD_ADD_FETCH_SIZE_T(&sendreq->req_bytes_delivered, req_bytes_delivered); SPC_USER_OR_MPI(sendreq->req_send.req_base.req_ompi.req_status.MPI_TAG, (ompi_spc_value_t)req_bytes_delivered, OMPI_SPC_BYTES_SENT_USER, OMPI_SPC_BYTES_SENT_MPI); if(send_request_pml_complete_check(sendreq) == false) { mca_pml_ob1_send_request_schedule(sendreq); } /* check for pending requests */ MCA_PML_OB1_PROGRESS_PENDING(bml_btl); } #if OPAL_CUDA_SUPPORT /* CUDA_ASYNC_SEND */ /** * This function is called when the copy of the frag from the GPU buffer * to the internal buffer is complete. Used to support asynchronous * copies from GPU to host buffers. Now the data can be sent. */ static void mca_pml_ob1_copy_frag_completion( mca_btl_base_module_t* btl, struct mca_btl_base_endpoint_t* ep, struct mca_btl_base_descriptor_t* des, int status ) { int rc; mca_bml_base_btl_t* bml_btl = (mca_bml_base_btl_t*) des->des_context; des->des_cbfunc = mca_pml_ob1_frag_completion; /* Reset the BTL onwership flag as the BTL can free it after completion. */ des->des_flags |= MCA_BTL_DES_FLAGS_BTL_OWNERSHIP; OPAL_OUTPUT((-1, "copy_frag_completion FRAG frag=%p", (void *)des)); /* Currently, we cannot support a failure in the send. In the blocking * case, the counters tracking the fragments being sent are not adjusted * until the function returns success, so it handles the error by leaving * all the buffer counters intact. In this case, it is too late so * we just abort. In theory, a new queue could be created to hold this * fragment and then attempt to send it out on another BTL. */ rc = mca_bml_base_send(bml_btl, des, MCA_PML_OB1_HDR_TYPE_FRAG); if(OPAL_UNLIKELY(rc < 0)) { opal_output(0, "%s:%d FATAL", __FILE__, __LINE__); ompi_rte_abort(-1, NULL); } } #endif /* OPAL_CUDA_SUPPORT */ /** * Buffer the entire message and mark as complete. */ int mca_pml_ob1_send_request_start_buffered( mca_pml_ob1_send_request_t* sendreq, mca_bml_base_btl_t* bml_btl, size_t size) { mca_btl_base_descriptor_t* des; mca_btl_base_segment_t* segment; mca_pml_ob1_hdr_t* hdr; struct iovec iov; unsigned int iov_count; size_t max_data, req_bytes_delivered; int rc; /* allocate descriptor */ mca_bml_base_alloc(bml_btl, &des, MCA_BTL_NO_ORDER, sizeof(mca_pml_ob1_rendezvous_hdr_t) + size, MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP | MCA_BTL_DES_FLAGS_SIGNAL); if( OPAL_UNLIKELY(NULL == des) ) { return OMPI_ERR_OUT_OF_RESOURCE; } segment = des->des_segments; /* pack the data into the BTL supplied buffer */ iov.iov_base = (IOVBASE_TYPE*)((unsigned char*)segment->seg_addr.pval + sizeof(mca_pml_ob1_rendezvous_hdr_t)); iov.iov_len = size; iov_count = 1; max_data = size; if((rc = opal_convertor_pack( &sendreq->req_send.req_base.req_convertor, &iov, &iov_count, &max_data)) < 0) { mca_bml_base_free(bml_btl, des); return rc; } req_bytes_delivered = max_data; /* build rendezvous header */ hdr = (mca_pml_ob1_hdr_t*)segment->seg_addr.pval; mca_pml_ob1_rendezvous_hdr_prepare (&hdr->hdr_rndv, MCA_PML_OB1_HDR_TYPE_RNDV, 0, sendreq->req_send.req_base.req_comm->c_contextid, sendreq->req_send.req_base.req_comm->c_my_rank, sendreq->req_send.req_base.req_tag, (uint16_t)sendreq->req_send.req_base.req_sequence, sendreq->req_send.req_bytes_packed, sendreq); ob1_hdr_hton(hdr, MCA_PML_OB1_HDR_TYPE_RNDV, sendreq->req_send.req_base.req_proc); /* update lengths */ segment->seg_len = sizeof(mca_pml_ob1_rendezvous_hdr_t) + max_data; des->des_cbfunc = mca_pml_ob1_rndv_completion; des->des_cbdata = sendreq; /* buffer the remainder of the message if it is not buffered yet */ if( OPAL_LIKELY(sendreq->req_send.req_addr == sendreq->req_send.req_base.req_addr) ) { rc = mca_pml_base_bsend_request_alloc((ompi_request_t*)sendreq); if( OPAL_UNLIKELY(OMPI_SUCCESS != rc) ) { mca_bml_base_free(bml_btl, des); return rc; } iov.iov_base = (IOVBASE_TYPE*)(((unsigned char*)sendreq->req_send.req_addr) + max_data); iov.iov_len = max_data = sendreq->req_send.req_bytes_packed - max_data; if((rc = opal_convertor_pack( &sendreq->req_send.req_base.req_convertor, &iov, &iov_count, &max_data)) < 0) { mca_bml_base_free(bml_btl, des); return rc; } /* re-init convertor for packed data */ opal_convertor_prepare_for_send( &sendreq->req_send.req_base.req_convertor, &(ompi_mpi_byte.dt.super), sendreq->req_send.req_bytes_packed, sendreq->req_send.req_addr ); } /* wait for ack and completion */ sendreq->req_state = 2; /* request is complete at mpi level */ MCA_PML_OB1_SEND_REQUEST_MPI_COMPLETE(sendreq, true); /* send */ rc = mca_bml_base_send(bml_btl, des, MCA_PML_OB1_HDR_TYPE_RNDV); if( OPAL_LIKELY( rc >= 0 ) ) { if( OPAL_LIKELY( 1 == rc ) ) { mca_pml_ob1_rndv_completion_request( bml_btl, sendreq, req_bytes_delivered); } return OMPI_SUCCESS; } mca_bml_base_free(bml_btl, des ); return rc; } /** * We work on a buffered request with a size smaller than the eager size * or the BTL is not able to send the data IN_PLACE. Request a segment * that is used for initial hdr and any eager data. This is used only * from the _START macro. */ int mca_pml_ob1_send_request_start_copy( mca_pml_ob1_send_request_t* sendreq, mca_bml_base_btl_t* bml_btl, size_t size ) { mca_btl_base_descriptor_t* des = NULL; mca_btl_base_segment_t* segment; mca_pml_ob1_hdr_t* hdr; struct iovec iov; unsigned int iov_count; size_t max_data = size; int rc; if(NULL != bml_btl->btl->btl_sendi) { mca_pml_ob1_match_hdr_t match; mca_pml_ob1_match_hdr_prepare (&match, MCA_PML_OB1_HDR_TYPE_MATCH, 0, sendreq->req_send.req_base.req_comm->c_contextid, sendreq->req_send.req_base.req_comm->c_my_rank, sendreq->req_send.req_base.req_tag, (uint16_t)sendreq->req_send.req_base.req_sequence); ob1_hdr_hton (&match, MCA_PML_OB1_HDR_TYPE_MATCH, sendreq->req_send.req_base.req_proc); /* try to send immediately */ rc = mca_bml_base_sendi( bml_btl, &sendreq->req_send.req_base.req_convertor, &match, OMPI_PML_OB1_MATCH_HDR_LEN, size, MCA_BTL_NO_ORDER, MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP, MCA_PML_OB1_HDR_TYPE_MATCH, &des); if( OPAL_LIKELY(OMPI_SUCCESS == rc) ) { /* signal request completion */ SPC_USER_OR_MPI(sendreq->req_send.req_base.req_ompi.req_status.MPI_TAG, (ompi_spc_value_t)size, OMPI_SPC_BYTES_SENT_USER, OMPI_SPC_BYTES_SENT_MPI); send_request_pml_complete(sendreq); return OMPI_SUCCESS; } /* just in case the btl changed the converter, reset it */ if (size > 0 && NULL != des) { MCA_PML_OB1_SEND_REQUEST_RESET(sendreq); } } else { /* allocate descriptor */ mca_bml_base_alloc( bml_btl, &des, MCA_BTL_NO_ORDER, OMPI_PML_OB1_MATCH_HDR_LEN + size, MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP); } if( OPAL_UNLIKELY(NULL == des) ) { return OMPI_ERR_OUT_OF_RESOURCE; } segment = des->des_segments; if(size > 0) { /* pack the data into the supplied buffer */ iov.iov_base = (IOVBASE_TYPE*)((unsigned char*)segment->seg_addr.pval + OMPI_PML_OB1_MATCH_HDR_LEN); iov.iov_len = size; iov_count = 1; /* * Before copy the user buffer, make the target part * accessible. */ MEMCHECKER( memchecker_call(&opal_memchecker_base_mem_defined, sendreq->req_send.req_base.req_addr, sendreq->req_send.req_base.req_count, sendreq->req_send.req_base.req_datatype); ); (void)opal_convertor_pack( &sendreq->req_send.req_base.req_convertor, &iov, &iov_count, &max_data ); /* * Packing finished, make the user buffer unaccessable. */ MEMCHECKER( memchecker_call(&opal_memchecker_base_mem_noaccess, sendreq->req_send.req_base.req_addr, sendreq->req_send.req_base.req_count, sendreq->req_send.req_base.req_datatype); ); } /* build match header */ hdr = (mca_pml_ob1_hdr_t*)segment->seg_addr.pval; mca_pml_ob1_match_hdr_prepare (&hdr->hdr_match, MCA_PML_OB1_HDR_TYPE_MATCH, 0, sendreq->req_send.req_base.req_comm->c_contextid, sendreq->req_send.req_base.req_comm->c_my_rank, sendreq->req_send.req_base.req_tag, (uint16_t)sendreq->req_send.req_base.req_sequence); ob1_hdr_hton(hdr, MCA_PML_OB1_HDR_TYPE_MATCH, sendreq->req_send.req_base.req_proc); /* update lengths */ segment->seg_len = OMPI_PML_OB1_MATCH_HDR_LEN + max_data; /* short message */ des->des_cbdata = sendreq; des->des_cbfunc = mca_pml_ob1_match_completion_free; /* send */ rc = mca_bml_base_send_status(bml_btl, des, MCA_PML_OB1_HDR_TYPE_MATCH); SPC_USER_OR_MPI(sendreq->req_send.req_base.req_ompi.req_status.MPI_TAG, (ompi_spc_value_t)size, OMPI_SPC_BYTES_SENT_USER, OMPI_SPC_BYTES_SENT_MPI); if( OPAL_LIKELY( rc >= OPAL_SUCCESS ) ) { if( OPAL_LIKELY( 1 == rc ) ) { mca_pml_ob1_match_completion_free_request( bml_btl, sendreq ); } return OMPI_SUCCESS; } if (OMPI_ERR_RESOURCE_BUSY == rc) { /* No more resources. Allow the upper level to queue the send */ rc = OMPI_ERR_OUT_OF_RESOURCE; } mca_bml_base_free (bml_btl, des); return rc; } /** * BTL can send directly from user buffer so allow the BTL * to prepare the segment list. Start sending a small message. */ int mca_pml_ob1_send_request_start_prepare( mca_pml_ob1_send_request_t* sendreq, mca_bml_base_btl_t* bml_btl, size_t size ) { mca_btl_base_descriptor_t* des; mca_btl_base_segment_t* segment; mca_pml_ob1_hdr_t* hdr; int rc; /* prepare descriptor */ mca_bml_base_prepare_src( bml_btl, &sendreq->req_send.req_base.req_convertor, MCA_BTL_NO_ORDER, OMPI_PML_OB1_MATCH_HDR_LEN, &size, MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP, &des ); if( OPAL_UNLIKELY(NULL == des) ) { return OMPI_ERR_OUT_OF_RESOURCE; } segment = des->des_segments; /* build match header */ hdr = (mca_pml_ob1_hdr_t*)segment->seg_addr.pval; mca_pml_ob1_match_hdr_prepare (&hdr->hdr_match, MCA_PML_OB1_HDR_TYPE_MATCH, 0, sendreq->req_send.req_base.req_comm->c_contextid, sendreq->req_send.req_base.req_comm->c_my_rank, sendreq->req_send.req_base.req_tag, (uint16_t)sendreq->req_send.req_base.req_sequence); ob1_hdr_hton(hdr, MCA_PML_OB1_HDR_TYPE_MATCH, sendreq->req_send.req_base.req_proc); /* short message */ des->des_cbfunc = mca_pml_ob1_match_completion_free; des->des_cbdata = sendreq; /* send */ rc = mca_bml_base_send(bml_btl, des, MCA_PML_OB1_HDR_TYPE_MATCH); SPC_USER_OR_MPI(sendreq->req_send.req_base.req_ompi.req_status.MPI_TAG, (ompi_spc_value_t)size, OMPI_SPC_BYTES_SENT_USER, OMPI_SPC_BYTES_SENT_MPI); if( OPAL_LIKELY( rc >= OPAL_SUCCESS ) ) { if( OPAL_LIKELY( 1 == rc ) ) { mca_pml_ob1_match_completion_free_request( bml_btl, sendreq ); } return OMPI_SUCCESS; } mca_bml_base_free(bml_btl, des ); return rc; } /** * We have contigous data that is registered - schedule across * available nics. */ int mca_pml_ob1_send_request_start_rdma( mca_pml_ob1_send_request_t* sendreq, mca_bml_base_btl_t* bml_btl, size_t size ) { /* * When req_rdma array is constructed the first element of the array always * assigned different btl in round robin fashion (if there are more than * one RDMA capable BTLs). This way round robin distribution of RDMA * operation is achieved. */ mca_btl_base_registration_handle_t *local_handle; mca_btl_base_descriptor_t *des; mca_pml_ob1_rdma_frag_t *frag; mca_pml_ob1_rget_hdr_t *hdr; size_t reg_size; void *data_ptr; int rc; bml_btl = sendreq->req_rdma[0].bml_btl; if (!(bml_btl->btl_flags & (MCA_BTL_FLAGS_GET | MCA_BTL_FLAGS_CUDA_GET))) { sendreq->rdma_frag = NULL; /* This BTL does not support get. Use rendezvous to start the RDMA operation using put instead. */ return mca_pml_ob1_send_request_start_rndv (sendreq, bml_btl, 0, MCA_PML_OB1_HDR_FLAGS_CONTIG | MCA_PML_OB1_HDR_FLAGS_PIN); } /* at this time ob1 does not support non-contiguous gets. the convertor represents a * contiguous block of memory */ opal_convertor_get_current_pointer (&sendreq->req_send.req_base.req_convertor, &data_ptr); local_handle = sendreq->req_rdma[0].btl_reg; /* allocate an rdma fragment to keep track of the request size for use in the fin message */ MCA_PML_OB1_RDMA_FRAG_ALLOC(frag); if (OPAL_UNLIKELY(NULL == frag)) { return OPAL_ERR_OUT_OF_RESOURCE; } /* fill in necessary fragment data */ frag->rdma_req = sendreq; frag->rdma_bml = bml_btl; frag->rdma_length = size; frag->rdma_bytes_remaining = size; frag->cbfunc = mca_pml_ob1_rget_completion; /* do not store the local handle in the fragment. it will be released by mca_pml_ob1_free_rdma_resources */ reg_size = bml_btl->btl->btl_registration_handle_size; /* allocate space for get hdr + segment list */ mca_bml_base_alloc(bml_btl, &des, MCA_BTL_NO_ORDER, sizeof (*hdr) + reg_size, MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP | MCA_BTL_DES_FLAGS_SIGNAL); if( OPAL_UNLIKELY(NULL == des) ) { /* NTH: no need to reset the converter here. it will be reset before it is retried */ MCA_PML_OB1_RDMA_FRAG_RETURN(frag); return OMPI_ERR_OUT_OF_RESOURCE; } /* save the fragment for get->put fallback */ sendreq->rdma_frag = frag; /* build match header */ hdr = (mca_pml_ob1_rget_hdr_t *) des->des_segments->seg_addr.pval; /* TODO -- Add support for multiple segments for get */ mca_pml_ob1_rget_hdr_prepare (hdr, MCA_PML_OB1_HDR_FLAGS_CONTIG | MCA_PML_OB1_HDR_FLAGS_PIN, sendreq->req_send.req_base.req_comm->c_contextid, sendreq->req_send.req_base.req_comm->c_my_rank, sendreq->req_send.req_base.req_tag, (uint16_t)sendreq->req_send.req_base.req_sequence, sendreq->req_send.req_bytes_packed, sendreq, frag, data_ptr, local_handle, reg_size); ob1_hdr_hton(hdr, MCA_PML_OB1_HDR_TYPE_RGET, sendreq->req_send.req_base.req_proc); des->des_cbfunc = mca_pml_ob1_send_ctl_completion; des->des_cbdata = sendreq; /** * Well, it's a get so we will not know when the peer will get the data anyway. * If we generate the PERUSE event here, at least we will know when we * sent the GET message ... */ if( sendreq->req_send.req_bytes_packed > 0 ) { PERUSE_TRACE_COMM_EVENT( PERUSE_COMM_REQ_XFER_BEGIN, &(sendreq->req_send.req_base), PERUSE_SEND ); } /* send */ rc = mca_bml_base_send(bml_btl, des, MCA_PML_OB1_HDR_TYPE_RGET); if (OPAL_UNLIKELY(rc < 0)) { mca_bml_base_free(bml_btl, des); return rc; } return OMPI_SUCCESS; } /** * Rendezvous is required. Not doing rdma so eager send up to * the btls eager limit. */ int mca_pml_ob1_send_request_start_rndv( mca_pml_ob1_send_request_t* sendreq, mca_bml_base_btl_t* bml_btl, size_t size, int flags ) { mca_btl_base_descriptor_t* des; mca_btl_base_segment_t* segment; mca_pml_ob1_hdr_t* hdr; int rc; /* prepare descriptor */ if(size == 0) { mca_bml_base_alloc( bml_btl, &des, MCA_BTL_NO_ORDER, sizeof(mca_pml_ob1_rendezvous_hdr_t), MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP ); } else { MEMCHECKER( memchecker_call(&opal_memchecker_base_mem_defined, sendreq->req_send.req_base.req_addr, sendreq->req_send.req_base.req_count, sendreq->req_send.req_base.req_datatype); ); mca_bml_base_prepare_src( bml_btl, &sendreq->req_send.req_base.req_convertor, MCA_BTL_NO_ORDER, sizeof(mca_pml_ob1_rendezvous_hdr_t), &size, MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP | MCA_BTL_DES_FLAGS_SIGNAL, &des ); MEMCHECKER( memchecker_call(&opal_memchecker_base_mem_noaccess, sendreq->req_send.req_base.req_addr, sendreq->req_send.req_base.req_count, sendreq->req_send.req_base.req_datatype); ); } if( OPAL_UNLIKELY(NULL == des) ) { return OMPI_ERR_OUT_OF_RESOURCE; } segment = des->des_segments; /* build hdr */ hdr = (mca_pml_ob1_hdr_t*)segment->seg_addr.pval; mca_pml_ob1_rendezvous_hdr_prepare (&hdr->hdr_rndv, MCA_PML_OB1_HDR_TYPE_RNDV, flags | MCA_PML_OB1_HDR_FLAGS_SIGNAL, sendreq->req_send.req_base.req_comm->c_contextid, sendreq->req_send.req_base.req_comm->c_my_rank, sendreq->req_send.req_base.req_tag, (uint16_t)sendreq->req_send.req_base.req_sequence, sendreq->req_send.req_bytes_packed, sendreq); ob1_hdr_hton(hdr, MCA_PML_OB1_HDR_TYPE_RNDV, sendreq->req_send.req_base.req_proc); /* first fragment of a long message */ des->des_cbdata = sendreq; des->des_cbfunc = mca_pml_ob1_rndv_completion; /* wait for ack and completion */ sendreq->req_state = 2; /* send */ rc = mca_bml_base_send(bml_btl, des, MCA_PML_OB1_HDR_TYPE_RNDV); if( OPAL_LIKELY( rc >= 0 ) ) { if( OPAL_LIKELY( 1 == rc ) ) { mca_pml_ob1_rndv_completion_request( bml_btl, sendreq, size ); } return OMPI_SUCCESS; } mca_bml_base_free(bml_btl, des ); return rc; } void mca_pml_ob1_send_request_copy_in_out( mca_pml_ob1_send_request_t *sendreq, uint64_t send_offset, uint64_t send_length ) { mca_pml_ob1_send_range_t *sr; opal_free_list_item_t *i; mca_bml_base_endpoint_t* bml_endpoint = sendreq->req_endpoint; int num_btls = mca_bml_base_btl_array_get_size(&bml_endpoint->btl_send); int n; double weight_total = 0; if( OPAL_UNLIKELY(0 == send_length) ) return; i = opal_free_list_wait (&mca_pml_ob1.send_ranges); sr = (mca_pml_ob1_send_range_t*)i; sr->range_send_offset = send_offset; sr->range_send_length = send_length; sr->range_btl_idx = 0; for(n = 0; n < num_btls && n < mca_pml_ob1.max_send_per_range; n++) { sr->range_btls[n].bml_btl = mca_bml_base_btl_array_get_next(&bml_endpoint->btl_send); weight_total += sr->range_btls[n].bml_btl->btl_weight; } sr->range_btl_cnt = n; mca_pml_ob1_calc_weighted_length(sr->range_btls, n, send_length, weight_total); OPAL_THREAD_LOCK(&sendreq->req_send_range_lock); opal_list_append(&sendreq->req_send_ranges, (opal_list_item_t*)sr); OPAL_THREAD_UNLOCK(&sendreq->req_send_range_lock); } static inline mca_pml_ob1_send_range_t * get_send_range_nolock(mca_pml_ob1_send_request_t* sendreq) { opal_list_item_t *item; item = opal_list_get_first(&sendreq->req_send_ranges); if(opal_list_get_end(&sendreq->req_send_ranges) == item) return NULL; return (mca_pml_ob1_send_range_t*)item; } static inline mca_pml_ob1_send_range_t * get_send_range(mca_pml_ob1_send_request_t* sendreq) { mca_pml_ob1_send_range_t *range; OPAL_THREAD_LOCK(&sendreq->req_send_range_lock); range = get_send_range_nolock(sendreq); OPAL_THREAD_UNLOCK(&sendreq->req_send_range_lock); return range; } static inline mca_pml_ob1_send_range_t * get_next_send_range(mca_pml_ob1_send_request_t* sendreq, mca_pml_ob1_send_range_t *range) { OPAL_THREAD_LOCK(&sendreq->req_send_range_lock); opal_list_remove_item(&sendreq->req_send_ranges, (opal_list_item_t *)range); opal_free_list_return (&mca_pml_ob1.send_ranges, &range->base); range = get_send_range_nolock(sendreq); OPAL_THREAD_UNLOCK(&sendreq->req_send_range_lock); return range; } /** * Schedule pipeline of send descriptors for the given request. * Up to the rdma threshold. If this is a send based protocol, * the rdma threshold is the end of the message. Otherwise, schedule * fragments up to the threshold to overlap initial registration/setup * costs of the rdma. Only one thread can be inside this function. */ int mca_pml_ob1_send_request_schedule_once(mca_pml_ob1_send_request_t* sendreq) { size_t prev_bytes_remaining = 0; mca_pml_ob1_send_range_t *range; int num_fail = 0; /* check pipeline_depth here before attempting to get any locks */ if(true == sendreq->req_throttle_sends && sendreq->req_pipeline_depth >= mca_pml_ob1.send_pipeline_depth) return OMPI_SUCCESS; range = get_send_range(sendreq); while(range && (false == sendreq->req_throttle_sends || sendreq->req_pipeline_depth < mca_pml_ob1.send_pipeline_depth)) { mca_pml_ob1_frag_hdr_t* hdr; mca_btl_base_descriptor_t* des; int rc, btl_idx; size_t size, offset, data_remaining = 0; mca_bml_base_btl_t* bml_btl; assert(range->range_send_length != 0); if(prev_bytes_remaining == range->range_send_length) num_fail++; else num_fail = 0; prev_bytes_remaining = range->range_send_length; if( OPAL_UNLIKELY(num_fail == range->range_btl_cnt) ) { /*TODO : assert(sendreq->req_pending == MCA_PML_OB1_SEND_PENDING_NONE); */ add_request_to_send_pending(sendreq, MCA_PML_OB1_SEND_PENDING_SCHEDULE, true); /* Note that request remains locked. send_request_process_pending() * function will call shedule_exclusive() directly without taking * the lock */ return OMPI_ERR_OUT_OF_RESOURCE; } cannot_pack: do { btl_idx = range->range_btl_idx; if(++range->range_btl_idx == range->range_btl_cnt) range->range_btl_idx = 0; } while(!range->range_btls[btl_idx].length); bml_btl = range->range_btls[btl_idx].bml_btl; /* If there is a remaining data from another BTL that was too small * for converter to pack then send it through another BTL */ range->range_btls[btl_idx].length += data_remaining; size = range->range_btls[btl_idx].length; /* makes sure that we don't exceed BTL max send size */ if(bml_btl->btl->btl_max_send_size != 0) { #if OPAL_CUDA_SUPPORT size_t max_send_size; if ((sendreq->req_send.req_base.req_convertor.flags & CONVERTOR_CUDA) && (bml_btl->btl->btl_cuda_max_send_size != 0)) { max_send_size = bml_btl->btl->btl_cuda_max_send_size - sizeof(mca_pml_ob1_frag_hdr_t); } else { max_send_size = bml_btl->btl->btl_max_send_size - sizeof(mca_pml_ob1_frag_hdr_t); } #else /* OPAL_CUDA_SUPPORT */ size_t max_send_size = bml_btl->btl->btl_max_send_size - sizeof(mca_pml_ob1_frag_hdr_t); #endif /* OPAL_CUDA_SUPPORT */ if (size > max_send_size) { size = max_send_size; } } /* pack into a descriptor */ offset = (size_t)range->range_send_offset; opal_convertor_set_position(&sendreq->req_send.req_base.req_convertor, &offset); range->range_send_offset = (uint64_t)offset; data_remaining = size; MEMCHECKER( memchecker_call(&opal_memchecker_base_mem_defined, sendreq->req_send.req_base.req_addr, sendreq->req_send.req_base.req_count, sendreq->req_send.req_base.req_datatype); ); mca_bml_base_prepare_src(bml_btl, &sendreq->req_send.req_base.req_convertor, MCA_BTL_NO_ORDER, sizeof(mca_pml_ob1_frag_hdr_t), &size, MCA_BTL_DES_FLAGS_BTL_OWNERSHIP | MCA_BTL_DES_SEND_ALWAYS_CALLBACK | MCA_BTL_DES_FLAGS_SIGNAL, &des); MEMCHECKER( memchecker_call(&opal_memchecker_base_mem_noaccess, sendreq->req_send.req_base.req_addr, sendreq->req_send.req_base.req_count, sendreq->req_send.req_base.req_datatype); ); if( OPAL_UNLIKELY(des == NULL || size == 0) ) { if(des) { /* Converter can't pack this chunk. Append to another chunk * from other BTL */ mca_bml_base_free(bml_btl, des); range->range_btls[btl_idx].length -= data_remaining; goto cannot_pack; } continue; } des->des_cbfunc = mca_pml_ob1_frag_completion; des->des_cbdata = sendreq; /* setup header */ hdr = (mca_pml_ob1_frag_hdr_t*)des->des_segments->seg_addr.pval; mca_pml_ob1_frag_hdr_prepare (hdr, 0, range->range_send_offset, sendreq, sendreq->req_recv.lval); ob1_hdr_hton(hdr, MCA_PML_OB1_HDR_TYPE_FRAG, sendreq->req_send.req_base.req_proc); #if OMPI_WANT_PERUSE PERUSE_TRACE_COMM_OMPI_EVENT(PERUSE_COMM_REQ_XFER_CONTINUE, &(sendreq->req_send.req_base), size, PERUSE_SEND); #endif /* OMPI_WANT_PERUSE */ #if OPAL_CUDA_SUPPORT /* CUDA_ASYNC_SEND */ /* At this point, check to see if the BTL is doing an asynchronous * copy. This would have been initiated in the mca_bml_base_prepare_src * called above. The flag is checked here as we let the hdr be * set up prior to checking. */ if (des->des_flags & MCA_BTL_DES_FLAGS_CUDA_COPY_ASYNC) { OPAL_OUTPUT((-1, "Initiating async copy on FRAG frag=%p", (void *)des)); /* Need to make sure BTL does not free frag after completion * of asynchronous copy as we still need to send the fragment. */ des->des_flags &= ~MCA_BTL_DES_FLAGS_BTL_OWNERSHIP; /* Unclear that this flag needs to be set but to be sure, set it */ des->des_flags |= MCA_BTL_DES_SEND_ALWAYS_CALLBACK; des->des_cbfunc = mca_pml_ob1_copy_frag_completion; range->range_btls[btl_idx].length -= size; range->range_send_length -= size; range->range_send_offset += size; OPAL_THREAD_ADD_FETCH32(&sendreq->req_pipeline_depth, 1); if(range->range_send_length == 0) { range = get_next_send_range(sendreq, range); prev_bytes_remaining = 0; } continue; } #endif /* OPAL_CUDA_SUPPORT */ /* initiate send - note that this may complete before the call returns */ rc = mca_bml_base_send(bml_btl, des, MCA_PML_OB1_HDR_TYPE_FRAG); if( OPAL_LIKELY(rc >= 0) ) { /* update state */ range->range_btls[btl_idx].length -= size; range->range_send_length -= size; range->range_send_offset += size; OPAL_THREAD_ADD_FETCH32(&sendreq->req_pipeline_depth, 1); if(range->range_send_length == 0) { range = get_next_send_range(sendreq, range); prev_bytes_remaining = 0; } } else { mca_bml_base_free(bml_btl,des); } } return OMPI_SUCCESS; } /** * A put fragment could not be started. Queue the fragment to be retried later or * fall back on send/recv. */ static void mca_pml_ob1_send_request_put_frag_failed (mca_pml_ob1_rdma_frag_t *frag, int rc) { mca_pml_ob1_send_request_t* sendreq = (mca_pml_ob1_send_request_t *) frag->rdma_req; mca_bml_base_btl_t *bml_btl = frag->rdma_bml; if (++frag->retries < mca_pml_ob1.rdma_retries_limit && OMPI_ERR_OUT_OF_RESOURCE == rc) { /* queue the frag for later if there was a resource error */ OPAL_THREAD_LOCK(&mca_pml_ob1.lock); opal_list_append(&mca_pml_ob1.rdma_pending, (opal_list_item_t*)frag); OPAL_THREAD_UNLOCK(&mca_pml_ob1.lock); } else { /* tell receiver to deregister memory */ mca_pml_ob1_send_fin (sendreq->req_send.req_base.req_proc, bml_btl, frag->rdma_hdr.hdr_rdma.hdr_frag, 0, MCA_BTL_NO_ORDER, OPAL_ERR_TEMP_OUT_OF_RESOURCE); /* send fragment by copy in/out */ mca_pml_ob1_send_request_copy_in_out(sendreq, frag->rdma_hdr.hdr_rdma.hdr_rdma_offset, frag->rdma_length); /* if a pointer to a receive request is not set it means that * ACK was not yet received. Don't schedule sends before ACK */ if (NULL != sendreq->req_recv.pval) mca_pml_ob1_send_request_schedule (sendreq); } } /** * An RDMA put operation has completed: * (1) Update request status and if required set completed * (2) Send FIN control message to the destination */ static void mca_pml_ob1_put_completion (mca_btl_base_module_t* btl, struct mca_btl_base_endpoint_t* ep, void *local_address, mca_btl_base_registration_handle_t *local_handle, void *context, void *cbdata, int status) { mca_pml_ob1_rdma_frag_t *frag = (mca_pml_ob1_rdma_frag_t *) cbdata; mca_pml_ob1_send_request_t *sendreq = (mca_pml_ob1_send_request_t *) frag->rdma_req; mca_bml_base_btl_t *bml_btl = (mca_bml_base_btl_t *) context; /* check completion status */ if( OPAL_UNLIKELY(OMPI_SUCCESS == status) ) { /* TODO -- read ordering */ mca_pml_ob1_send_fin (sendreq->req_send.req_base.req_proc, bml_btl, frag->rdma_hdr.hdr_rdma.hdr_frag, frag->rdma_length, 0, 0); /* check for request completion */ OPAL_THREAD_ADD_FETCH_SIZE_T(&sendreq->req_bytes_delivered, frag->rdma_length); SPC_USER_OR_MPI(sendreq->req_send.req_base.req_ompi.req_status.MPI_TAG, (ompi_spc_value_t)frag->rdma_length, OMPI_SPC_BYTES_SENT_USER, OMPI_SPC_BYTES_SENT_MPI); send_request_pml_complete_check(sendreq); } else { /* try to fall back on send/recv */ mca_pml_ob1_send_request_put_frag_failed (frag, status); } MCA_PML_OB1_RDMA_FRAG_RETURN(frag); MCA_PML_OB1_PROGRESS_PENDING(bml_btl); } int mca_pml_ob1_send_request_put_frag( mca_pml_ob1_rdma_frag_t *frag ) { mca_pml_ob1_send_request_t *sendreq = (mca_pml_ob1_send_request_t *) frag->rdma_req; mca_btl_base_registration_handle_t *local_handle = NULL; mca_bml_base_btl_t *bml_btl = frag->rdma_bml; int rc; if (bml_btl->btl->btl_register_mem && NULL == frag->local_handle) { /* Check if the segment is already registered */ for (size_t i = 0 ; i < sendreq->req_rdma_cnt ; ++i) { if (sendreq->req_rdma[i].bml_btl == frag->rdma_bml) { /* do not copy the handle to the fragment to avoid deregistring it twice */ local_handle = sendreq->req_rdma[i].btl_reg; break; } } if (NULL == frag->local_handle) { /* Not already registered. Register the region with the BTL. */ mca_bml_base_register_mem (bml_btl, frag->local_address, frag->rdma_length, 0, &frag->local_handle); if (OPAL_UNLIKELY(NULL == frag->local_handle)) { mca_pml_ob1_send_request_put_frag_failed (frag, OMPI_ERR_OUT_OF_RESOURCE); return OMPI_ERR_OUT_OF_RESOURCE; } local_handle = frag->local_handle; } } PERUSE_TRACE_COMM_OMPI_EVENT( PERUSE_COMM_REQ_XFER_CONTINUE, &(((mca_pml_ob1_send_request_t*)frag->rdma_req)->req_send.req_base), frag->rdma_length, PERUSE_SEND ); rc = mca_bml_base_put (bml_btl, frag->local_address, frag->remote_address, local_handle, (mca_btl_base_registration_handle_t *) frag->remote_handle, frag->rdma_length, 0, MCA_BTL_NO_ORDER, mca_pml_ob1_put_completion, frag); /* Count the bytes put even though they probably haven't been sent yet */ SPC_RECORD(OMPI_SPC_BYTES_PUT, (ompi_spc_value_t)frag->rdma_length); if (OPAL_UNLIKELY(OMPI_SUCCESS != rc)) { mca_pml_ob1_send_request_put_frag_failed (frag, rc); return rc; } return OMPI_SUCCESS; } /** * Receiver has scheduled an RDMA operation: * (1) Allocate an RDMA fragment to maintain the state of the operation * (2) Call BTL prepare_src to pin/prepare source buffers * (3) Queue the RDMA put */ void mca_pml_ob1_send_request_put( mca_pml_ob1_send_request_t* sendreq, mca_btl_base_module_t* btl, mca_pml_ob1_rdma_hdr_t* hdr ) { mca_bml_base_endpoint_t *bml_endpoint = sendreq->req_endpoint; mca_pml_ob1_rdma_frag_t* frag; if(hdr->hdr_common.hdr_flags & MCA_PML_OB1_HDR_TYPE_ACK) { OPAL_THREAD_ADD_FETCH32(&sendreq->req_state, -1); } sendreq->req_recv.pval = hdr->hdr_recv_req.pval; if (NULL == sendreq->rdma_frag) { MCA_PML_OB1_RDMA_FRAG_ALLOC(frag); if( OPAL_UNLIKELY(NULL == frag) ) { /* TSW - FIX */ OMPI_ERROR_LOG(OMPI_ERR_OUT_OF_RESOURCE); ompi_rte_abort(-1, NULL); } } else { /* rget fallback on put */ frag = sendreq->rdma_frag; sendreq->rdma_frag = NULL; sendreq->req_state = 0; } /* copy registration data */ memcpy (frag->remote_handle, hdr + 1, btl->btl_registration_handle_size); frag->rdma_bml = mca_bml_base_btl_array_find(&bml_endpoint->btl_rdma, btl); frag->rdma_hdr.hdr_rdma = *hdr; frag->rdma_req = sendreq; frag->rdma_length = hdr->hdr_dst_size; frag->rdma_state = MCA_PML_OB1_RDMA_PUT; frag->remote_address = hdr->hdr_dst_ptr; frag->retries = 0; /* Get the address of the current offset. Note: at this time ob1 CAN NOT handle * non-contiguous RDMA. If that changes this code will be wrong. */ opal_convertor_get_offset_pointer (&sendreq->req_send.req_base.req_convertor, hdr->hdr_rdma_offset, &frag->local_address); mca_pml_ob1_send_request_put_frag(frag); }