/* * Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana * University Research and Technology * Corporation. All rights reserved. * Copyright (c) 2004-2005 The University of Tennessee and The University * of Tennessee Research Foundation. All rights * reserved. * Copyright (c) 2004-2005 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) 2006 Sandia National Laboratories. All rights * reserved. * $COPYRIGHT$ * * Additional copyrights may follow * * $HEADER$ */ #include "ompi_config.h" #include "ompi/constants.h" #include "opal/event/event.h" #include "opal/util/if.h" #include "opal/util/argv.h" #include "opal/util/output.h" #include "ompi/mca/pml/pml.h" #include "ompi/mca/btl/btl.h" #include "opal/sys/timer.h" #include "opal/mca/base/mca_base_param.h" #include "orte/mca/errmgr/errmgr.h" #include "ompi/mca/mpool/base/base.h" #include "btl_ud.h" #include "btl_ud_frag.h" #include "btl_ud_endpoint.h" #include "ompi/mca/btl/base/base.h" #include "ompi/datatype/convertor.h" #include "ompi/mca/mpool/mpool.h" #include #include #include #include /* for strerror()*/ #include "ompi/mca/pml/base/pml_base_module_exchange.h" mca_btl_ud_component_t mca_btl_ud_component = { { /* First, the mca_base_component_t struct containing meta information about the component itself */ { /* Indicate that we are a pml v1.0.0 component (which also implies a specific MCA version) */ MCA_BTL_BASE_VERSION_1_0_0, "ud", /* MCA component name */ OMPI_MAJOR_VERSION, /* MCA component major version */ OMPI_MINOR_VERSION, /* MCA component minor version */ OMPI_RELEASE_VERSION, /* MCA component release version */ mca_btl_ud_component_open, /* component open */ mca_btl_ud_component_close /* component close */ }, /* Next the MCA v1.0.0 component meta data */ { /* Whether the component is checkpointable or not */ false }, mca_btl_ud_component_init, mca_btl_ud_component_progress, } }; /* * Profiling information */ #if MCA_BTL_UD_ENABLE_PROFILE mca_btl_ud_profile_t mca_btl_ud_profile = {0}; #endif /* * utility routines for parameter registration */ static inline void mca_btl_ud_param_register_string( const char* param_name, const char* param_desc, const char* default_value, char** out_value) { mca_base_param_reg_string(&mca_btl_ud_component.super.btl_version, param_name, param_desc, false, false, default_value, out_value); } static inline void mca_btl_ud_param_register_int( const char* param_name, const char* param_desc, int default_value, int* out_value) { mca_base_param_reg_int(&mca_btl_ud_component.super.btl_version, param_name, param_desc, false, false, default_value, out_value); } /* * Called by MCA framework to open the component, registers * component parameters. */ int mca_btl_ud_component_open(void) { /* initialize state */ mca_btl_ud_component.ib_num_btls=0; mca_btl_ud_component.ud_btls=NULL; /* initialize objects */ OBJ_CONSTRUCT(&mca_btl_ud_component.ib_procs, opal_list_t); /* register IB component parameters */ mca_btl_ud_param_register_int ("max_btls", "maximum number of HCAs/ports to use", 4, (int*)&mca_btl_ud_component.ib_max_btls); mca_btl_ud_param_register_int ("free_list_num", "intial size of free lists", 8, &mca_btl_ud_component.ib_free_list_num); mca_btl_ud_param_register_int ("free_list_max", "maximum size of free lists", -1, &mca_btl_ud_component.ib_free_list_max); mca_btl_ud_param_register_int ("free_list_inc", "increment size of free lists", 32, &mca_btl_ud_component.ib_free_list_inc); mca_btl_ud_param_register_string("mpool", "name of the memory pool to be used", "openib", &mca_btl_ud_component.ib_mpool_name); mca_btl_ud_param_register_int("reg_mru_len", "length of the registration cache most recently used list", 16, (int*) &mca_btl_ud_component.reg_mru_len); mca_btl_ud_param_register_int("use_srq", "if 1 use the IB shared receive queue to post receive descriptors", 0, (int*) &mca_btl_ud_component.use_srq); mca_btl_ud_param_register_int("ib_cq_size", "size of the IB completion queue", 2000, (int*) &mca_btl_ud_component.ib_cq_size); mca_btl_ud_param_register_int("ib_sg_list_size", "size of IB segment list", 4, (int*) &mca_btl_ud_component.ib_sg_list_size); mca_btl_ud_param_register_int("ib_pkey_ix", "IB pkey index", 0, (int*) &mca_btl_ud_component.ib_pkey_ix); mca_btl_ud_param_register_int("ib_qkey", "IB qkey", 0x01330133, (int*) &mca_btl_ud_component.ib_qkey); mca_btl_ud_param_register_int("ib_psn", "IB Packet sequence starting number", 0, (int*) &mca_btl_ud_component.ib_psn); mca_btl_ud_param_register_int("ib_service_level", "IB service level", 0, (int*) &mca_btl_ud_component.ib_service_level); mca_btl_ud_param_register_int("ib_src_path_bits", "IB source path bits", 0, (int*) &mca_btl_ud_component.ib_src_path_bits); mca_btl_ud_param_register_int ("exclusivity", "BTL exclusivity", MCA_BTL_EXCLUSIVITY_DEFAULT, (int*) &mca_btl_ud_module.super.btl_exclusivity); mca_btl_ud_param_register_int("sd_num", "maximum descriptors to post to a QP", 16, (int*) &mca_btl_ud_component.sd_num); mca_btl_ud_param_register_int("rd_num", "number of receive descriptors to post to a QP", 500, (int*) &mca_btl_ud_component.rd_num); mca_btl_ud_param_register_int("rd_low", "low water mark before reposting occurs", 300, (int*) &mca_btl_ud_component.rd_low); mca_btl_ud_param_register_int("srq_rd_max", "Max number of receive descriptors posted per SRQ.", 1000, (int*) &mca_btl_ud_component.srq_rd_max); mca_btl_ud_param_register_int("srq_rd_per_peer", "Number of receive descriptors posted per peer. (SRQ)", 16, (int*) &mca_btl_ud_component.srq_rd_per_peer); mca_btl_ud_param_register_int("srq_sd_max", "Maximum number of send descriptors posted. (SRQ)", 8, &mca_btl_ud_component.srq_sd_max); /* TODO - this assumes a 2k UD MTU - should query/do something more intelligent */ mca_btl_ud_param_register_int ("eager_limit", "eager send limit", 2047, (int*)&mca_btl_ud_module.super.btl_eager_limit); mca_btl_ud_param_register_int ("min_send_size", "minimum send size", 2048, (int*)&mca_btl_ud_module.super.btl_min_send_size); mca_btl_ud_param_register_int ("max_send_size", "maximum send size", 2048, (int*) &mca_btl_ud_module.super.btl_max_send_size); mca_btl_ud_param_register_int("bandwidth", "Approximate maximum bandwidth of interconnect", 800, (int*) &mca_btl_ud_module.super.btl_bandwidth); mca_btl_ud_module.super.btl_eager_limit -= sizeof(mca_btl_ud_header_t); mca_btl_ud_module.super.btl_max_send_size -= sizeof(mca_btl_ud_header_t); mca_btl_ud_component.max_send_size = mca_btl_ud_module.super.btl_max_send_size; mca_btl_ud_component.eager_limit = mca_btl_ud_module.super.btl_eager_limit; return OMPI_SUCCESS; } /* * component cleanup - sanity checking of queue lengths */ int mca_btl_ud_component_close(void) { /* Calculate and print profiling numbers */ MCA_BTL_UD_SHOW_TIME(post_send); MCA_BTL_UD_SHOW_TIME(endpoint_send_conn); MCA_BTL_UD_SHOW_TIME(ibv_post_send); MCA_BTL_UD_SHOW_TIME(full_send); return OMPI_SUCCESS; } /* * Register UD port information. The MCA framework * will make this available to all peers. */ static int mca_btl_ud_modex_send(void) { int rc; size_t i; size_t size; mca_btl_ud_port_info_t *ports = NULL; size = mca_btl_ud_component.ib_num_btls * sizeof (mca_btl_ud_port_info_t); if (size != 0) { ports = (mca_btl_ud_port_info_t *)malloc (size); if (NULL == ports) { return OMPI_ERR_OUT_OF_RESOURCE; } for (i = 0; i < mca_btl_ud_component.ib_num_btls; i++) { mca_btl_ud_module_t *btl = &mca_btl_ud_component.ud_btls[i]; ports[i] = btl->port_info; } } rc = mca_pml_base_modex_send (&mca_btl_ud_component.super.btl_version, ports, size); if (NULL != ports) { free (ports); } return rc; } /* * UD component initialization: * (1) read interface list from kernel and compare against component parameters * then create a BTL instance for selected interfaces * (2) post OOB receive for incoming connection attempts * (3) register BTL parameters with the MCA */ mca_btl_base_module_t** mca_btl_ud_component_init(int *num_btl_modules, bool enable_progress_threads, bool enable_mpi_threads) { struct ibv_device **ib_devs; struct ibv_device* ib_dev; int32_t num_devs; mca_btl_base_module_t** btls; uint32_t i,j, length; struct mca_mpool_base_resources_t mpool_resources; opal_list_t btl_list; mca_btl_ud_module_t* ud_btl; mca_btl_base_selected_module_t* ib_selected; opal_list_item_t* item; unsigned short seedv[3]; /* initialization */ *num_btl_modules = 0; num_devs = 0; seedv[0] = orte_process_info.my_name->vpid; seedv[1] = opal_sys_timer_get_cycles(); seedv[2] = opal_sys_timer_get_cycles(); seed48(seedv); #if OMPI_MCA_BTL_OPENIB_HAVE_DEVICE_LIST ib_devs = ibv_get_device_list(&num_devs); #else /* Determine the number of hca's available on the host */ dev_list = ibv_get_devices(); if (NULL == dev_list) { mca_btl_base_error_no_nics("OpenIB", "HCA"); mca_btl_ud_component.ib_num_btls = 0; mca_btl_ud_modex_send(); return NULL; } dlist_start(dev_list); dlist_for_each_data(dev_list, ib_dev, struct ibv_device) num_devs++; #endif if(0 == num_devs) { mca_btl_base_error_no_nics("OpenIB", "HCA"); mca_btl_ud_modex_send(); return NULL; } #if OMPI_MCA_BTL_OPENIB_HAVE_DEVICE_LIST == 0 /* Allocate space for the ib devices */ ib_devs = (struct ibv_device**) malloc(num_devs * sizeof(struct ibv_dev*)); if(NULL == ib_devs) { ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE); return NULL; } dlist_start(dev_list); i = 0; dlist_for_each_data(dev_list, ib_dev, struct ibv_device) ib_devs[i++] = ib_dev; #endif /** We must loop through all the hca id's, get there handles and for each hca we query the number of ports on the hca and set up a distinct btl module for each hca port */ OBJ_CONSTRUCT(&btl_list, opal_list_t); OBJ_CONSTRUCT(&mca_btl_ud_component.ib_lock, opal_mutex_t); for(i = 0; (int32_t)i < num_devs && mca_btl_ud_component.ib_num_btls < mca_btl_ud_component.ib_max_btls; i++){ struct ibv_device_attr ib_dev_attr; struct ibv_context* ib_dev_context; ib_dev = ib_devs[i]; ib_dev_context = ibv_open_device(ib_dev); if(!ib_dev_context) { BTL_ERROR((" error obtaining device context for %s errno says %s\n", ibv_get_device_name(ib_dev), strerror(errno))); return NULL; } if(ibv_query_device(ib_dev_context, &ib_dev_attr)){ BTL_ERROR(("error obtaining device attributes for %s errno says %s\n", ibv_get_device_name(ib_dev), strerror(errno))); return NULL; } /* Note ports are 1 based hence j = 1 */ for(j = 1; j <= ib_dev_attr.phys_port_cnt; j++){ struct ibv_port_attr* ib_port_attr; ib_port_attr = (struct ibv_port_attr*) malloc(sizeof(struct ibv_port_attr)); if(ibv_query_port(ib_dev_context, (uint8_t) j, ib_port_attr)){ BTL_ERROR(("error getting port attributes for device %s port number %d errno says %s", ibv_get_device_name(ib_dev), j, strerror(errno))); return NULL; } if( IBV_PORT_ACTIVE == ib_port_attr->state ){ ud_btl = (mca_btl_ud_module_t*) malloc(sizeof(mca_btl_ud_module_t)); memcpy(ud_btl, &mca_btl_ud_module, sizeof(mca_btl_ud_module)); ib_selected = OBJ_NEW(mca_btl_base_selected_module_t); ib_selected->btl_module = (mca_btl_base_module_t*) ud_btl; ud_btl->ib_dev = ib_dev; ud_btl->ib_dev_context = ib_dev_context; ud_btl->port_num = (uint8_t) j; ud_btl->ib_port_attr = ib_port_attr; ud_btl->port_info.subnet = ib_port_attr->sm_lid; /* store the sm_lid for multi-nic support */ opal_list_append(&btl_list, (opal_list_item_t*) ib_selected); if(++mca_btl_ud_component.ib_num_btls >= mca_btl_ud_component.ib_max_btls) break; } else{ free(ib_port_attr); } } } /* Allocate space for btl modules */ mca_btl_ud_component.ud_btls = (mca_btl_ud_module_t*) malloc(sizeof(mca_btl_ud_module_t) * mca_btl_ud_component.ib_num_btls); if(NULL == mca_btl_ud_component.ud_btls) { ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE); return NULL; } btls = (struct mca_btl_base_module_t**) malloc(mca_btl_ud_component.ib_num_btls * sizeof(mca_btl_ud_module_t*)); if(NULL == btls) { ORTE_ERROR_LOG(ORTE_ERR_OUT_OF_RESOURCE); return NULL; } for(i = 0; i < mca_btl_ud_component.ib_num_btls; i++){ item = opal_list_remove_first(&btl_list); ib_selected = (mca_btl_base_selected_module_t*)item; ud_btl = (mca_btl_ud_module_t*) ib_selected->btl_module; memcpy(&(mca_btl_ud_component.ud_btls[i]), ud_btl , sizeof(mca_btl_ud_module_t)); free(ib_selected); free(ud_btl); ud_btl = &mca_btl_ud_component.ud_btls[i]; ud_btl->rd_num = mca_btl_ud_component.rd_num; ud_btl->rd_low = mca_btl_ud_component.rd_low; ud_btl->sd_wqe_lp = mca_btl_ud_component.sd_num; ud_btl->sd_wqe_hp = mca_btl_ud_component.sd_num; /* Initialize module state */ OBJ_CONSTRUCT(&ud_btl->ib_lock, opal_mutex_t); OBJ_CONSTRUCT(&ud_btl->send_free_eager, ompi_free_list_t); OBJ_CONSTRUCT(&ud_btl->send_free_max, ompi_free_list_t); OBJ_CONSTRUCT(&ud_btl->send_free_frag, ompi_free_list_t); OBJ_CONSTRUCT(&ud_btl->recv_free_eager, ompi_free_list_t); OBJ_CONSTRUCT(&ud_btl->recv_free_max, ompi_free_list_t); OBJ_CONSTRUCT(&ud_btl->pending_frags_hp, opal_list_t); OBJ_CONSTRUCT(&ud_btl->pending_frags_lp, opal_list_t); if(mca_btl_ud_module_init(ud_btl) != OMPI_SUCCESS) { #if OMPI_MCA_BTL_OPENIB_HAVE_DEVICE_LIST ibv_free_device_list(ib_devs); #else free(ib_devs); #endif return NULL; } mpool_resources.ib_pd = ud_btl->ib_pd; /* initialize the memory pool using the hca */ ud_btl->super.btl_mpool = mca_mpool_base_module_create(mca_btl_ud_component.ib_mpool_name, &ud_btl->super, &mpool_resources); if(NULL == ud_btl->super.btl_mpool) { BTL_ERROR(("error creating openib memory pool! aborting ud btl initialization")); return NULL; } /* Initialize pool of send fragments */ length = sizeof(mca_btl_ud_frag_t) + sizeof(mca_btl_ud_header_t) + ud_btl->super.btl_eager_limit + 2*MCA_BTL_IB_FRAG_ALIGN; ompi_free_list_init(&ud_btl->send_free_eager, length, OBJ_CLASS(mca_btl_ud_send_frag_eager_t), mca_btl_ud_component.ib_free_list_num, mca_btl_ud_component.ib_free_list_max, mca_btl_ud_component.ib_free_list_inc, ud_btl->super.btl_mpool); ompi_free_list_init(&ud_btl->recv_free_eager, length + sizeof(mca_btl_ud_ib_header_t), OBJ_CLASS(mca_btl_ud_recv_frag_eager_t), mca_btl_ud_component.ib_free_list_num, mca_btl_ud_component.ib_free_list_max, mca_btl_ud_component.ib_free_list_inc, ud_btl->super.btl_mpool); length = sizeof(mca_btl_ud_frag_t) + sizeof(mca_btl_ud_header_t) + ud_btl->super.btl_max_send_size + 2*MCA_BTL_IB_FRAG_ALIGN; ompi_free_list_init(&ud_btl->send_free_max, length, OBJ_CLASS(mca_btl_ud_send_frag_max_t), mca_btl_ud_component.ib_free_list_num, mca_btl_ud_component.ib_free_list_max, mca_btl_ud_component.ib_free_list_inc, ud_btl->super.btl_mpool); /* Initialize pool of receive fragments */ ompi_free_list_init (&ud_btl->recv_free_max, length + sizeof(mca_btl_ud_ib_header_t), OBJ_CLASS (mca_btl_ud_recv_frag_max_t), mca_btl_ud_component.ib_free_list_num, mca_btl_ud_component.ib_free_list_max, mca_btl_ud_component.ib_free_list_inc, ud_btl->super.btl_mpool); length = sizeof(mca_btl_ud_frag_t) + sizeof(mca_btl_ud_header_t)+ 2*MCA_BTL_IB_FRAG_ALIGN; ompi_free_list_init(&ud_btl->send_free_frag, length, OBJ_CLASS(mca_btl_ud_send_frag_frag_t), mca_btl_ud_component.ib_free_list_num, mca_btl_ud_component.ib_free_list_max, mca_btl_ud_component.ib_free_list_inc, ud_btl->super.btl_mpool); /* Post receive descriptors */ do { int32_t i; int rc; struct ibv_recv_wr* bad_wr; for(i = 0; i < ud_btl->rd_num; i++) { mca_btl_ud_frag_t* frag; OMPI_FREE_LIST_WAIT(&ud_btl->recv_free_eager, frag, rc); frag->sg_entry.length = frag->size + sizeof(mca_btl_ud_header_t) + sizeof(mca_btl_ud_ib_header_t); if(ibv_post_recv(ud_btl->qp_hp, &frag->wr_desc.rd_desc, &bad_wr)) { BTL_ERROR(("error posting recv, errno %s\n", strerror(errno))); return NULL; } OMPI_FREE_LIST_WAIT(&ud_btl->recv_free_max, frag, rc); frag->sg_entry.length = frag->size + sizeof(mca_btl_ud_header_t) + sizeof(mca_btl_ud_ib_header_t); if(ibv_post_recv(ud_btl->qp_lp, &frag->wr_desc.rd_desc, &bad_wr)) { BTL_ERROR(("error posting recv, errno %s\n", strerror(errno))); return NULL; } } } while(0); /* TODO - Put this somewhere else or clean up our macros */ #if 0 #ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ if(mca_btl_ud_component.use_srq) { MCA_BTL_UD_POST_SRR_HIGH(ud_btl, 1); MCA_BTL_UD_POST_SRR_LOW(ud_btl, 1); } else { #endif MCA_BTL_UD_ENDPOINT_POST_RR_HIGH(ud_btl, 0); MCA_BTL_UD_ENDPOINT_POST_RR_LOW(ud_btl, 0); #ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ } #endif #endif btls[i] = &ud_btl->super; } /* Post OOB receive to support dynamic connection setup */ mca_btl_ud_post_recv(); mca_btl_ud_modex_send(); *num_btl_modules = mca_btl_ud_component.ib_num_btls; #if OMPI_MCA_BTL_OPENIB_HAVE_DEVICE_LIST ibv_free_device_list(ib_devs); #else free(ib_devs); #endif return btls; } static inline int mca_btl_ud_handle_incoming_hp(mca_btl_ud_module_t *, mca_btl_ud_frag_t *, size_t); static inline int mca_btl_ud_handle_incoming_hp( mca_btl_ud_module_t *ud_btl, mca_btl_ud_frag_t *frag, size_t byte_len) { struct ibv_recv_wr* bad_wr; /* advance the segment address past the header and adjust the length..*/ frag->segment.seg_addr.pval = frag->hdr + 1; frag->segment.seg_len = byte_len - sizeof(mca_btl_ud_header_t) - sizeof(mca_btl_ud_ib_header_t); /* call registered callback */ ud_btl->ib_reg[frag->hdr->tag].cbfunc(&ud_btl->super, frag->hdr->tag, &frag->base, ud_btl->ib_reg[frag->hdr->tag].cbdata); /* TODO - not resetting segment values here.. problem? */ if(ibv_post_recv(ud_btl->qp_hp, &frag->wr_desc.rd_desc, &bad_wr)) { BTL_ERROR(("error posting recv, errno %s\n", strerror(errno))); return OMPI_ERROR; } #if 0 OMPI_FREE_LIST_RETURN(&(ud_btl->recv_free_eager), (opal_list_item_t*) frag); /* repost receive descriptors */ #ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ if(mca_btl_ud_component.use_srq) { OPAL_THREAD_ADD32((int32_t*) &ud_btl->srd_posted_hp, -1); MCA_BTL_UD_POST_SRR_HIGH(ud_btl, 0); } else { #endif OPAL_THREAD_ADD32((int32_t*) &ud_btl->rd_posted_hp, -1); MCA_BTL_UD_ENDPOINT_POST_RR_HIGH(ud_btl, 0); #ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ } #endif #endif return OMPI_SUCCESS; } /* * IB component progress. */ int mca_btl_ud_component_progress() { uint32_t i; int count = 0,ne = 0, ret; mca_btl_ud_frag_t* frag; struct ibv_recv_wr* bad_wr; /* Poll for completions */ for(i = 0; i < mca_btl_ud_component.ib_num_btls; i++) { struct ibv_wc wc; mca_btl_ud_module_t* ud_btl = &mca_btl_ud_component.ud_btls[i]; ne=ibv_poll_cq(ud_btl->ib_cq_hp, 1, &wc); if(ne < 0 ) { BTL_ERROR(("error polling HP CQ with %d errno says %s\n", ne, strerror(errno))); return OMPI_ERROR; } else if(1 == ne) { if(wc.status != IBV_WC_SUCCESS) { BTL_ERROR(("error polling HP CQ with status %d for wr_id %llu opcode %d\n", wc.status, wc.wr_id, wc.opcode)); return OMPI_ERROR; } /* Handle work completions */ switch(wc.opcode) { case IBV_WC_SEND : frag = (mca_btl_ud_frag_t*)(unsigned long)wc.wr_id; #if MCA_BTL_UD_ENABLE_PROFILE mca_btl_ud_profile.avg_full_send += opal_sys_timer_get_cycles() - frag->tm; mca_btl_ud_profile.cnt_full_send++; #endif /* Process a completed send */ frag->base.des_cbfunc(&ud_btl->super, frag->endpoint, &frag->base, OMPI_SUCCESS); OPAL_THREAD_ADD32(&ud_btl->sd_wqe_hp, 1); if(!opal_list_is_empty(&ud_btl->pending_frags_hp)) { frag = (mca_btl_ud_frag_t*) opal_list_remove_first(&ud_btl->pending_frags_hp); mca_btl_ud_endpoint_post_send(ud_btl, frag->endpoint, frag); } count++; break; case IBV_WC_RECV: /* Process a RECV */ frag = (mca_btl_ud_frag_t*)(unsigned long) wc.wr_id; ret = mca_btl_ud_handle_incoming_hp(ud_btl, frag, wc.byte_len); if (ret != OMPI_SUCCESS) return ret; count++; break; default: BTL_ERROR(("Unhandled work completion opcode is %d", wc.opcode)); break; } } ne=ibv_poll_cq(ud_btl->ib_cq_lp, 1, &wc ); if(ne < 0){ BTL_ERROR(("error polling LP CQ with %d errno says %s", ne, strerror(errno))); return OMPI_ERROR; } else if(1 == ne) { if(wc.status != IBV_WC_SUCCESS) { BTL_ERROR(("error polling LP CQ with status %d for wr_id %llu opcode %d", wc.status, wc.wr_id, wc.opcode)); return OMPI_ERROR; } /* Handle n/w completions */ switch(wc.opcode) { case IBV_WC_SEND: frag = (mca_btl_ud_frag_t*) (unsigned long) wc.wr_id; /* Process a completed send - receiver must return tokens */ frag->base.des_cbfunc(&ud_btl->super, frag->endpoint, &frag->base, OMPI_SUCCESS); OPAL_THREAD_ADD32(&ud_btl->sd_wqe_lp, 1); if(!opal_list_is_empty(&ud_btl->pending_frags_lp)) { frag = (mca_btl_ud_frag_t*) opal_list_remove_first(&ud_btl->pending_frags_lp); mca_btl_ud_endpoint_post_send(ud_btl, frag->endpoint, frag); } count++; break; case IBV_WC_RECV: /* Process a RECV */ frag = (mca_btl_ud_frag_t*) (unsigned long) wc.wr_id; frag->segment.seg_addr.pval = frag->hdr + 1; frag->segment.seg_len = wc.byte_len - sizeof(mca_btl_ud_header_t) - sizeof(mca_btl_ud_ib_header_t); /* call registered callback */ ud_btl->ib_reg[frag->hdr->tag].cbfunc(&ud_btl->super, frag->hdr->tag, &frag->base, ud_btl->ib_reg[frag->hdr->tag].cbdata); if(ibv_post_recv(ud_btl->qp_lp, &frag->wr_desc.rd_desc, &bad_wr)) { BTL_ERROR(("error posting recv, errno %s\n", strerror(errno))); return OMPI_ERROR; } #if 0 OMPI_FREE_LIST_RETURN( &(ud_btl->recv_free_max), (opal_list_item_t*) frag); #ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ if(mca_btl_ud_component.use_srq) { /* repost receive descriptors */ OPAL_THREAD_ADD32((int32_t*) &ud_btl->srd_posted_lp, -1); MCA_BTL_UD_POST_SRR_LOW(ud_btl, 0); } else { #endif /* repost receive descriptors */ OPAL_THREAD_ADD32((int32_t*) &ud_btl->rd_posted_lp, -1); MCA_BTL_UD_ENDPOINT_POST_RR_LOW(ud_btl, 0); #ifdef OMPI_MCA_BTL_OPENIB_HAVE_SRQ } #endif #endif count++; break; default: BTL_ERROR(("Unhandled work completion opcode %d", wc.opcode)); break; } } } return count; }