/* -*- 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) 2004-2013 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 Los Alamos National Security, LLC. All rights * reserved. * $COPYRIGHT$ * * Additional copyrights may follow * * $HEADER$ */ #include "ompi_config.h" #include "opal/prefetch.h" #include "ompi/constants.h" #include "ompi/mca/pml/pml.h" #include "ompi/mca/btl/btl.h" #include "ompi/mca/mpool/mpool.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, ompi_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; assert( false == sendreq->req_send.req_base.req_free_called ); OPAL_THREAD_LOCK(&ompi_request_lock); 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 ); } OPAL_THREAD_UNLOCK(&ompi_request_lock); *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_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; 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); } 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_SIZE_T(&sendreq->req_bytes_delivered, req_bytes_delivered); /* advance the request */ OPAL_THREAD_ADD32(&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 (btl->btl_seg_size, (void *) des->des_src, des->des_src_cnt, 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_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; /* count bytes of user data actually delivered and check for request completion */ if (OPAL_LIKELY(OMPI_SUCCESS == status)) { req_bytes_delivered = mca_pml_ob1_compute_segment_length (btl->btl_seg_size, (void *) des->des_src, des->des_src_cnt, 0); OPAL_THREAD_ADD_SIZE_T(&sendreq->req_bytes_delivered, req_bytes_delivered); } sendreq->src_des = NULL; send_request_pml_complete_check(sendreq); /* free the descriptor */ mca_bml_base_free(bml_btl, des); 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 (btl->btl_seg_size, (void *) des->des_src, des->des_src_cnt, sizeof(mca_pml_ob1_frag_hdr_t)); OPAL_THREAD_ADD_SIZE_T(&sendreq->req_pipeline_depth, -1); OPAL_THREAD_ADD_SIZE_T(&sendreq->req_bytes_delivered, req_bytes_delivered); 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__); orte_errmgr.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); if( OPAL_UNLIKELY(NULL == des) ) { return OMPI_ERR_OUT_OF_RESOURCE; } segment = des->des_src; /* 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; hdr->hdr_common.hdr_flags = 0; hdr->hdr_common.hdr_type = MCA_PML_OB1_HDR_TYPE_RNDV; hdr->hdr_match.hdr_ctx = sendreq->req_send.req_base.req_comm->c_contextid; hdr->hdr_match.hdr_src = sendreq->req_send.req_base.req_comm->c_my_rank; hdr->hdr_match.hdr_tag = sendreq->req_send.req_base.req_tag; hdr->hdr_match.hdr_seq = (uint16_t)sendreq->req_send.req_base.req_sequence; hdr->hdr_rndv.hdr_msg_length = sendreq->req_send.req_bytes_packed; hdr->hdr_rndv.hdr_src_req.pval = 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 */ 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 */ OPAL_THREAD_LOCK(&ompi_request_lock); MCA_PML_OB1_SEND_REQUEST_MPI_COMPLETE(sendreq, true); OPAL_THREAD_UNLOCK(&ompi_request_lock); /* 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; match.hdr_common.hdr_flags = 0; match.hdr_common.hdr_type = MCA_PML_OB1_HDR_TYPE_MATCH; match.hdr_ctx = sendreq->req_send.req_base.req_comm->c_contextid; match.hdr_src = sendreq->req_send.req_base.req_comm->c_my_rank; match.hdr_tag = sendreq->req_send.req_base.req_tag; match.hdr_seq = (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 */ send_request_pml_complete(sendreq); /* check for pending requests */ MCA_PML_OB1_PROGRESS_PENDING(bml_btl); 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_src; 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; hdr->hdr_common.hdr_flags = 0; hdr->hdr_common.hdr_type = MCA_PML_OB1_HDR_TYPE_MATCH; hdr->hdr_match.hdr_ctx = sendreq->req_send.req_base.req_comm->c_contextid; hdr->hdr_match.hdr_src = sendreq->req_send.req_base.req_comm->c_my_rank; hdr->hdr_match.hdr_tag = sendreq->req_send.req_base.req_tag; hdr->hdr_match.hdr_seq = (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); if( OPAL_LIKELY( rc >= OMPI_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, NULL, &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_src; /* build match header */ hdr = (mca_pml_ob1_hdr_t*)segment->seg_addr.pval; hdr->hdr_common.hdr_flags = 0; hdr->hdr_common.hdr_type = MCA_PML_OB1_HDR_TYPE_MATCH; hdr->hdr_match.hdr_ctx = sendreq->req_send.req_base.req_comm->c_contextid; hdr->hdr_match.hdr_src = sendreq->req_send.req_base.req_comm->c_my_rank; hdr->hdr_match.hdr_tag = sendreq->req_send.req_base.req_tag; hdr->hdr_match.hdr_seq = (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); if( OPAL_LIKELY( rc >= 0 ) ) { 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_descriptor_t *des, *src = NULL; mca_pml_ob1_rget_hdr_t *hdr; size_t seg_size; int rc; sendreq->src_des = NULL; bml_btl = sendreq->req_rdma[0].bml_btl; if (!(bml_btl->btl_flags & (MCA_BTL_FLAGS_GET | MCA_BTL_FLAGS_CUDA_GET))) { /* 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); } 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); ); /* prepare source descriptor/segment(s) */ /* PML owns this descriptor and will free it in */ /* mca_pml_ob1_rget_completion */ mca_bml_base_prepare_src( bml_btl, sendreq->req_rdma[0].btl_reg, &sendreq->req_send.req_base.req_convertor, MCA_BTL_NO_ORDER, 0, &size, MCA_BTL_DES_FLAGS_GET | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP, &src ); 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 == src) ) { return OMPI_ERR_OUT_OF_RESOURCE; } src->des_cbfunc = mca_pml_ob1_rget_completion; src->des_cbdata = sendreq; sendreq->src_des = src; seg_size = bml_btl->btl->btl_seg_size * src->des_src_cnt; /* allocate space for get hdr + segment list */ mca_bml_base_alloc(bml_btl, &des, MCA_BTL_NO_ORDER, sizeof (*hdr) + seg_size, MCA_BTL_DES_FLAGS_PRIORITY | MCA_BTL_DES_FLAGS_BTL_OWNERSHIP); if( OPAL_UNLIKELY(NULL == des) ) { /* NTH: no need to reset the converter here. it will be reset before it is retried */ mca_bml_base_free(bml_btl, src); return OMPI_ERR_OUT_OF_RESOURCE; } /* build match header */ hdr = (mca_pml_ob1_rget_hdr_t *) des->des_src->seg_addr.pval; hdr->hdr_rndv.hdr_match.hdr_common.hdr_flags = MCA_PML_OB1_HDR_FLAGS_CONTIG|MCA_PML_OB1_HDR_FLAGS_PIN; hdr->hdr_rndv.hdr_match.hdr_common.hdr_type = MCA_PML_OB1_HDR_TYPE_RGET; hdr->hdr_rndv.hdr_match.hdr_ctx = sendreq->req_send.req_base.req_comm->c_contextid; hdr->hdr_rndv.hdr_match.hdr_src = sendreq->req_send.req_base.req_comm->c_my_rank; hdr->hdr_rndv.hdr_match.hdr_tag = sendreq->req_send.req_base.req_tag; hdr->hdr_rndv.hdr_match.hdr_seq = (uint16_t)sendreq->req_send.req_base.req_sequence; hdr->hdr_rndv.hdr_msg_length = sendreq->req_send.req_bytes_packed; hdr->hdr_rndv.hdr_src_req.pval = sendreq; hdr->hdr_des.pval = src; hdr->hdr_seg_cnt = src->des_src_cnt; ob1_hdr_hton(hdr, MCA_PML_OB1_HDR_TYPE_RGET, sendreq->req_send.req_base.req_proc); /* copy segment data */ memcpy (hdr + 1, src->des_src, seg_size); 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); if (sendreq->src_des) { mca_bml_base_free (bml_btl, sendreq->src_des); sendreq->src_des = NULL; } 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, NULL, &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, &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_src; /* build hdr */ hdr = (mca_pml_ob1_hdr_t*)segment->seg_addr.pval; hdr->hdr_common.hdr_flags = flags; hdr->hdr_common.hdr_type = MCA_PML_OB1_HDR_TYPE_RNDV; hdr->hdr_match.hdr_ctx = sendreq->req_send.req_base.req_comm->c_contextid; hdr->hdr_match.hdr_src = sendreq->req_send.req_base.req_comm->c_my_rank; hdr->hdr_match.hdr_tag = sendreq->req_send.req_base.req_tag; hdr->hdr_match.hdr_seq = (uint16_t)sendreq->req_send.req_base.req_sequence; hdr->hdr_rndv.hdr_msg_length = sendreq->req_send.req_bytes_packed; hdr->hdr_rndv.hdr_src_req.pval = 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; ompi_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; OMPI_FREE_LIST_WAIT_MT(&mca_pml_ob1.send_ranges, i); 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); OMPI_FREE_LIST_RETURN_MT(&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) ) { 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) { size_t max_send_size = bml_btl->btl->btl_max_send_size - sizeof(mca_pml_ob1_frag_hdr_t); 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, NULL, &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, &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_src->seg_addr.pval; hdr->hdr_common.hdr_flags = 0; hdr->hdr_common.hdr_type = MCA_PML_OB1_HDR_TYPE_FRAG; hdr->hdr_frag_offset = range->range_send_offset; hdr->hdr_src_req.pval = sendreq; hdr->hdr_dst_req = sendreq->req_recv; 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_SIZE_T(&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_SIZE_T(&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; } /** * 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, struct mca_btl_base_descriptor_t* des, int status ) { mca_pml_ob1_rdma_frag_t* frag = (mca_pml_ob1_rdma_frag_t*)des->des_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*) des->des_context; /* check completion status */ if( OPAL_UNLIKELY(OMPI_SUCCESS != status) ) { /* TSW - FIX */ OMPI_ERROR_LOG(status); ompi_rte_abort(-1, NULL); } mca_pml_ob1_send_fin(sendreq->req_send.req_base.req_proc, bml_btl, frag->rdma_hdr.hdr_rdma.hdr_des, des->order, 0); /* check for request completion */ OPAL_THREAD_ADD_SIZE_T(&sendreq->req_bytes_delivered, frag->rdma_length); send_request_pml_complete_check(sendreq); 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_mpool_base_registration_t *reg = NULL; mca_bml_base_btl_t *bml_btl = frag->rdma_bml; mca_btl_base_descriptor_t *des; size_t save_size = frag->rdma_length; int rc; if (OPAL_LIKELY(NULL == sendreq->src_des)) { /* setup descriptor */ mca_bml_base_prepare_src( bml_btl, reg, &frag->convertor, MCA_BTL_NO_ORDER, 0, &frag->rdma_length, MCA_BTL_DES_FLAGS_BTL_OWNERSHIP | MCA_BTL_DES_FLAGS_PUT, &des ); if( OPAL_UNLIKELY(NULL == des) ) { if(frag->retries < mca_pml_ob1.rdma_retries_limit) { size_t offset = (size_t)frag->rdma_hdr.hdr_rdma.hdr_rdma_offset; frag->rdma_length = save_size; opal_convertor_set_position(&frag->convertor, &offset); 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 { mca_pml_ob1_send_request_t *sendreq = (mca_pml_ob1_send_request_t*)frag->rdma_req; /* tell receiver to unregister memory */ mca_pml_ob1_send_fin(sendreq->req_send.req_base.req_proc, bml_btl, frag->rdma_hdr.hdr_rdma.hdr_des, MCA_BTL_NO_ORDER, 1); /* 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); } return OMPI_ERR_OUT_OF_RESOURCE; } } else { /* already have a source descriptor */ des = sendreq->src_des; sendreq->src_des = NULL; } des->des_dst = (mca_btl_base_segment_t *) frag->rdma_segs; des->des_dst_cnt = frag->rdma_hdr.hdr_rdma.hdr_seg_cnt; des->des_cbfunc = mca_pml_ob1_put_completion; des->des_cbdata = frag; PERUSE_TRACE_COMM_OMPI_EVENT( PERUSE_COMM_REQ_XFER_CONTINUE, &(((mca_pml_ob1_send_request_t*)frag->rdma_req)->req_send.req_base), save_size, PERUSE_SEND ); rc = mca_bml_base_put(bml_btl, des); if (OPAL_UNLIKELY(OMPI_SUCCESS != rc)) { mca_bml_base_free(bml_btl, des); frag->rdma_length = save_size; if(OMPI_ERR_OUT_OF_RESOURCE == rc) { 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); return OMPI_ERR_OUT_OF_RESOURCE; } else { /* TSW - FIX */ OMPI_ERROR_LOG(rc); ompi_rte_abort(-1, NULL); } } 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; size_t i, size = 0; if(hdr->hdr_common.hdr_flags & MCA_PML_OB1_HDR_TYPE_ACK) { OPAL_THREAD_ADD32(&sendreq->req_state, -1); } sendreq->req_recv.pval = hdr->hdr_recv_req.pval; 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); } assert (btl->btl_seg_size * hdr->hdr_seg_cnt <= sizeof (frag->rdma_segs)); /* setup fragment */ memcpy (frag->rdma_segs, hdr + 1, btl->btl_seg_size * hdr->hdr_seg_cnt); for( i = 0; i < hdr->hdr_seg_cnt; i++ ) { mca_btl_base_segment_t *seg = (mca_btl_base_segment_t *) ((uintptr_t)(frag->rdma_segs) + i * btl->btl_seg_size); #if OPAL_ENABLE_HETEROGENEOUS_SUPPORT if ((sendreq->req_send.req_base.req_proc->proc_arch & OPAL_ARCH_ISBIGENDIAN) != (ompi_proc_local()->proc_arch & OPAL_ARCH_ISBIGENDIAN)) { size += opal_swap_bytes4(seg->seg_len); } else #endif { size += seg->seg_len; } } 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_ep = bml_endpoint; frag->rdma_length = size; frag->rdma_state = MCA_PML_OB1_RDMA_PUT; frag->reg = NULL; frag->retries = 0; if (OPAL_UNLIKELY(NULL != sendreq->src_des)) { /* get fallback path */ sendreq->req_state = 0; } /* lookup the corresponding registration */ for(i=0; ireq_rdma_cnt; i++) { if(sendreq->req_rdma[i].bml_btl == frag->rdma_bml) { frag->reg = sendreq->req_rdma[i].btl_reg; break; } } /* RDMA writes may proceed in parallel to send and to each other, so * create clone of the convertor for each RDMA fragment */ size = hdr->hdr_rdma_offset; opal_convertor_clone_with_position(&sendreq->req_send.req_base.req_convertor, &frag->convertor, 0, &size); mca_pml_ob1_send_request_put_frag(frag); }