X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/d0443518bf57fa4111a6437a8f3322f12cd88f29..31b7fa457f9267af8eda2eee06aae74dd78eb412:/src/smpi/smpi_base.c diff --git a/src/smpi/smpi_base.c b/src/smpi/smpi_base.c index d923982079..8bb4d4f093 100644 --- a/src/smpi/smpi_base.c +++ b/src/smpi/smpi_base.c @@ -1,253 +1,738 @@ -#include "private.h" - -XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi, "Logging specific to SMPI (base)"); +/* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team. + * All rights reserved. */ -smpi_mpi_global_t smpi_mpi_global = NULL; +/* This program is free software; you can redistribute it and/or modify it + * under the terms of the license (GNU LGPL) which comes with this package. */ -void smpi_mpi_land_func(void *a, void *b, int *length, MPI_Datatype *datatype); - -void smpi_mpi_land_func(void *a, void *b, int *length, MPI_Datatype *datatype) -{ - int i; - if (*datatype == smpi_mpi_global->mpi_int) { - int *x = a, *y = b; - for (i = 0; i < *length; i++) { - y[i] = x[i] && y[i]; - } - } +#include "private.h" +#include "xbt/time.h" +#include "mc/mc.h" + +XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi, + "Logging specific to SMPI (base)"); +XBT_LOG_EXTERNAL_CATEGORY(smpi_base); +XBT_LOG_EXTERNAL_CATEGORY(smpi_bench); +XBT_LOG_EXTERNAL_CATEGORY(smpi_kernel); +XBT_LOG_EXTERNAL_CATEGORY(smpi_mpi); +XBT_LOG_EXTERNAL_CATEGORY(smpi_mpi_dt); +XBT_LOG_EXTERNAL_CATEGORY(smpi_coll); +XBT_LOG_EXTERNAL_CATEGORY(smpi_receiver); +XBT_LOG_EXTERNAL_CATEGORY(smpi_sender); +XBT_LOG_EXTERNAL_CATEGORY(smpi_util); + +static int match_recv(void* a, void* b) { + MPI_Request ref = (MPI_Request)a; + MPI_Request req = (MPI_Request)b; + + xbt_assert0(ref, "Cannot match recv against null reference"); + xbt_assert0(req, "Cannot match recv against null request"); + return req->comm == ref->comm + && (ref->src == MPI_ANY_SOURCE || req->src == ref->src) + && (ref->tag == MPI_ANY_TAG || req->tag == ref->tag); } -void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype *datatype); +static int match_send(void* a, void* b) { + MPI_Request ref = (MPI_Request)a; + MPI_Request req = (MPI_Request)b; -void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype *datatype) -{ - int i; - if (*datatype == smpi_mpi_global->mpi_int) { - int *x = a, *y = b; - for (i = 0; i < *length; i++) { - y[i] = x[i] + y[i]; - } - } + xbt_assert0(ref, "Cannot match send against null reference"); + xbt_assert0(req, "Cannot match send against null request"); + return req->comm == ref->comm + && (req->src == MPI_ANY_SOURCE || req->src == ref->src) + && (req->tag == MPI_ANY_TAG || req->tag == ref->tag); } -int smpi_mpi_comm_rank(smpi_mpi_communicator_t comm) +static MPI_Request build_request(void *buf, int count, + MPI_Datatype datatype, int src, int dst, + int tag, MPI_Comm comm, unsigned flags) { - return comm->index_to_rank_map[smpi_host_index()]; + MPI_Request request; + + request = xbt_new(s_smpi_mpi_request_t, 1); + request->buf = buf; + request->size = smpi_datatype_size(datatype) * count; + request->src = src; + request->dst = dst; + request->tag = tag; + request->comm = comm; + request->action = NULL; + request->flags = flags; +#ifdef HAVE_TRACING + request->send = 0; + request->recv = 0; +#endif + return request; } -void smpi_mpi_init() +/* MPI Low level calls */ +MPI_Request smpi_mpi_send_init(void *buf, int count, MPI_Datatype datatype, + int dst, int tag, MPI_Comm comm) { - smx_host_t host; - smx_host_t *hosts; - int host_count; - int i; - smpi_host_data_t hdata; - - SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex); - smpi_global->running_hosts_count++; - SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex); - - // initialize some local variables - host = SIMIX_host_self(); - hosts = SIMIX_host_get_table(); - host_count = SIMIX_host_get_number(); + MPI_Request request = + build_request(buf, count, datatype, smpi_comm_rank(comm), dst, tag, + comm, PERSISTENT | SEND); - hdata = xbt_new(s_smpi_host_data_t, 1); - - for (i = 0; i < host_count && host != hosts[i]; i ++); + return request; +} - hdata->index = i; - hdata->mutex = SIMIX_mutex_init(); - hdata->cond = SIMIX_cond_init(); +MPI_Request smpi_mpi_recv_init(void *buf, int count, MPI_Datatype datatype, + int src, int tag, MPI_Comm comm) +{ + MPI_Request request = + build_request(buf, count, datatype, src, smpi_comm_rank(comm), tag, + comm, PERSISTENT | RECV); - SIMIX_host_set_data(host, hdata); + return request; +} - // node 0 sets the globals - if (0 == i) { +void smpi_mpi_start(MPI_Request request) +{ + smx_rdv_t mailbox; + + xbt_assert0(!request->action, + "Cannot (re)start a non-finished communication"); + if(request->flags & RECV) { + print_request("New recv", request); + mailbox = smpi_process_mailbox(); + request->action = SIMIX_req_comm_irecv(mailbox, request->buf, &request->size, &match_recv, request); + } else { + print_request("New send", request); + mailbox = smpi_process_remote_mailbox(request->dst); + request->action = SIMIX_req_comm_isend(mailbox, request->size, -1.0, + request->buf, request->size, &match_send, request, 0); +#ifdef HAVE_TRACING + SIMIX_req_set_category (request->action, TRACE_internal_smpi_get_category()); +#endif + } +} - smpi_global->hosts = hosts; - smpi_global->host_count = host_count; +void smpi_mpi_startall(int count, MPI_Request * requests) +{ + int i; - smpi_mpi_global = xbt_new(s_smpi_mpi_global_t, 1); + for(i = 0; i < count; i++) { + smpi_mpi_start(requests[i]); + } +} - // global communicator - smpi_mpi_global->mpi_comm_world = xbt_new(s_smpi_mpi_communicator_t, 1); - smpi_mpi_global->mpi_comm_world->size = host_count; - smpi_mpi_global->mpi_comm_world->barrier_count = 0; - smpi_mpi_global->mpi_comm_world->barrier_mutex = SIMIX_mutex_init(); - smpi_mpi_global->mpi_comm_world->barrier_cond = SIMIX_cond_init(); - smpi_mpi_global->mpi_comm_world->rank_to_index_map = xbt_new(int, host_count); - smpi_mpi_global->mpi_comm_world->index_to_rank_map = xbt_new(int, host_count); - for (i = 0; i < host_count; i++) { - smpi_mpi_global->mpi_comm_world->rank_to_index_map[i] = i; - smpi_mpi_global->mpi_comm_world->index_to_rank_map[i] = i; - } +void smpi_mpi_request_free(MPI_Request * request) +{ + xbt_free(*request); + *request = MPI_REQUEST_NULL; +} - // mpi datatypes - smpi_mpi_global->mpi_byte = xbt_new(s_smpi_mpi_datatype_t, 1); - smpi_mpi_global->mpi_byte->size = (size_t)1; - smpi_mpi_global->mpi_int = xbt_new(s_smpi_mpi_datatype_t, 1); - smpi_mpi_global->mpi_int->size = sizeof(int); - smpi_mpi_global->mpi_double = xbt_new(s_smpi_mpi_datatype_t, 1); - smpi_mpi_global->mpi_double->size = sizeof(double); +MPI_Request smpi_isend_init(void *buf, int count, MPI_Datatype datatype, + int dst, int tag, MPI_Comm comm) +{ + MPI_Request request = + build_request(buf, count, datatype, smpi_comm_rank(comm), dst, tag, + comm, NON_PERSISTENT | SEND); - // mpi operations - smpi_mpi_global->mpi_land = xbt_new(s_smpi_mpi_op_t, 1); - smpi_mpi_global->mpi_land->func = smpi_mpi_land_func; - smpi_mpi_global->mpi_sum = xbt_new(s_smpi_mpi_op_t, 1); - smpi_mpi_global->mpi_sum->func = smpi_mpi_sum_func; + return request; +} - // signal all nodes to perform initialization - SIMIX_mutex_lock(smpi_global->start_stop_mutex); - smpi_global->root_ready = 1; - SIMIX_cond_broadcast(smpi_global->start_stop_cond); - SIMIX_mutex_unlock(smpi_global->start_stop_mutex); +MPI_Request smpi_mpi_isend(void *buf, int count, MPI_Datatype datatype, + int dst, int tag, MPI_Comm comm) +{ + MPI_Request request = + smpi_isend_init(buf, count, datatype, dst, tag, comm); - } else { + smpi_mpi_start(request); + return request; +} - // make sure root is done before own initialization - SIMIX_mutex_lock(smpi_global->start_stop_mutex); - while (!smpi_global->root_ready) { - SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex); - } - SIMIX_mutex_unlock(smpi_global->start_stop_mutex); +MPI_Request smpi_irecv_init(void *buf, int count, MPI_Datatype datatype, + int src, int tag, MPI_Comm comm) +{ + MPI_Request request = + build_request(buf, count, datatype, src, smpi_comm_rank(comm), tag, + comm, NON_PERSISTENT | RECV); - } + return request; +} - // wait for all nodes to signal initializatin complete - SIMIX_mutex_lock(smpi_global->start_stop_mutex); - smpi_global->ready_process_count++; - if (smpi_global->ready_process_count >= 3 * host_count) { - SIMIX_cond_broadcast(smpi_global->start_stop_cond); - } - while (smpi_global->ready_process_count < 3 * host_count) { - SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex); - } - SIMIX_mutex_unlock(smpi_global->start_stop_mutex); +MPI_Request smpi_mpi_irecv(void *buf, int count, MPI_Datatype datatype, + int src, int tag, MPI_Comm comm) +{ + MPI_Request request = + smpi_irecv_init(buf, count, datatype, src, tag, comm); - return; + smpi_mpi_start(request); + return request; } -void smpi_mpi_finalize() +void smpi_mpi_recv(void *buf, int count, MPI_Datatype datatype, int src, + int tag, MPI_Comm comm, MPI_Status * status) { - int i; - - SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex); - i = --smpi_global->running_hosts_count; - SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex); + MPI_Request request; - SIMIX_mutex_lock(smpi_global->start_stop_mutex); - smpi_global->ready_process_count--; - SIMIX_mutex_unlock(smpi_global->start_stop_mutex); + request = smpi_mpi_irecv(buf, count, datatype, src, tag, comm); + smpi_mpi_wait(&request, status); +} - SIMIX_mutex_destroy(smpi_host_mutex()); - SIMIX_cond_destroy(smpi_host_cond()); +void smpi_mpi_send(void *buf, int count, MPI_Datatype datatype, int dst, + int tag, MPI_Comm comm) +{ + MPI_Request request; - if (0 >= i) { + request = smpi_mpi_isend(buf, count, datatype, dst, tag, comm); + smpi_mpi_wait(&request, MPI_STATUS_IGNORE); +} - // wake up senders/receivers - for (i = 0; i < smpi_global->host_count; i++) { - if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) { - SIMIX_process_resume(smpi_global->sender_processes[i]); - } - if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) { - SIMIX_process_resume(smpi_global->receiver_processes[i]); - } - } +void smpi_mpi_sendrecv(void *sendbuf, int sendcount, MPI_Datatype sendtype, + int dst, int sendtag, void *recvbuf, int recvcount, + MPI_Datatype recvtype, int src, int recvtag, + MPI_Comm comm, MPI_Status * status) +{ + MPI_Request requests[2]; + MPI_Status stats[2]; + + requests[0] = + smpi_isend_init(sendbuf, sendcount, sendtype, dst, sendtag, comm); + requests[1] = + smpi_irecv_init(recvbuf, recvcount, recvtype, src, recvtag, comm); + smpi_mpi_startall(2, requests); + smpi_mpi_waitall(2, requests, stats); + if(status != MPI_STATUS_IGNORE) { + // Copy receive status + memcpy(status, &stats[1], sizeof(MPI_Status)); + } +} - SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex); - SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond); - xbt_free(smpi_mpi_global->mpi_comm_world); +int smpi_mpi_get_count(MPI_Status * status, MPI_Datatype datatype) +{ + return status->count / smpi_datatype_size(datatype); +} - xbt_free(smpi_mpi_global->mpi_byte); - xbt_free(smpi_mpi_global->mpi_int); - xbt_free(smpi_mpi_global->mpi_double); +static void finish_wait(MPI_Request * request, MPI_Status * status) +{ + MPI_Request req = *request; + + if(status != MPI_STATUS_IGNORE) { + status->MPI_SOURCE = req->src; + status->MPI_TAG = req->tag; + status->MPI_ERROR = MPI_SUCCESS; + status->count = SIMIX_req_comm_get_dst_buff_size(req->action); + } + SIMIX_req_comm_destroy(req->action); + print_request("Finishing", req); + if(req->flags & NON_PERSISTENT) { + smpi_mpi_request_free(request); + } else { + req->action = NULL; + } +} - xbt_free(smpi_mpi_global->mpi_land); - xbt_free(smpi_mpi_global->mpi_sum); +int smpi_mpi_test(MPI_Request * request, MPI_Status * status) +{ + int flag = SIMIX_req_comm_test((*request)->action); - xbt_free(smpi_mpi_global); + if(flag) { + smpi_mpi_wait(request, status); + } + return flag; +} - } +int smpi_mpi_testany(int count, MPI_Request requests[], int *index, + MPI_Status * status) +{ + xbt_dynar_t comms; + int i, flag, size; + int* map; + + *index = MPI_UNDEFINED; + flag = 0; + if(count > 0) { + comms = xbt_dynar_new(sizeof(smx_action_t), NULL); + map = xbt_new(int, count); + size = 0; + for(i = 0; i < count; i++) { + if(requests[i]->action) { + xbt_dynar_push(comms, &requests[i]->action); + map[size] = i; + size++; + } + } + if(size > 0) { + *index = SIMIX_req_comm_testany(comms); + *index = map[*index]; + if(*index != MPI_UNDEFINED) { + smpi_mpi_wait(&requests[*index], status); + flag = 1; + } + } + xbt_free(map); + xbt_dynar_free(&comms); + } + return flag; +} -} +void smpi_mpi_wait(MPI_Request * request, MPI_Status * status) +{ + print_request("Waiting", *request); + SIMIX_req_comm_wait((*request)->action, -1.0); + finish_wait(request, status); +} -int smpi_mpi_barrier(smpi_mpi_communicator_t comm) +int smpi_mpi_waitany(int count, MPI_Request requests[], + MPI_Status * status) { + xbt_dynar_t comms; + int i, size, index; + int *map; + + index = MPI_UNDEFINED; + if(count > 0) { + // Wait for a request to complete + comms = xbt_dynar_new(sizeof(smx_action_t), NULL); + map = xbt_new(int, count); + size = 0; + DEBUG0("Wait for one of"); + for(i = 0; i < count; i++) { + if(requests[i] != MPI_REQUEST_NULL) { + print_request(" ", requests[i]); + xbt_dynar_push(comms, &requests[i]->action); + map[size] = i; + size++; + } + } + if(size > 0) { + index = SIMIX_req_comm_waitany(comms); + index = map[index]; + finish_wait(&requests[index], status); + } + xbt_free(map); + xbt_dynar_free(&comms); + } + return index; +} - SIMIX_mutex_lock(comm->barrier_mutex); - ++comm->barrier_count; - if (comm->barrier_count > comm->size) { // only happens on second barrier... - comm->barrier_count = 0; - } else if (comm->barrier_count == comm->size) { - SIMIX_cond_broadcast(comm->barrier_cond); - } - while (comm->barrier_count < comm->size) { - SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex); - } - SIMIX_mutex_unlock(comm->barrier_mutex); +void smpi_mpi_waitall(int count, MPI_Request requests[], + MPI_Status status[]) +{ + int index, c; + MPI_Status stat; + MPI_Status *pstat = status == MPI_STATUS_IGNORE ? MPI_STATUS_IGNORE : &stat; + + for(c = 0; c < count; c++) { + if(MC_IS_ENABLED) { + smpi_mpi_wait(&requests[c], pstat); + index = c; + } else { + index = smpi_mpi_waitany(count, requests, pstat); + if(index == MPI_UNDEFINED) { + break; + } + } + if(status != MPI_STATUS_IGNORE) { + memcpy(&status[index], pstat, sizeof(*pstat)); + } + } +} - return MPI_SUCCESS; +int smpi_mpi_waitsome(int incount, MPI_Request requests[], int *indices, + MPI_Status status[]) +{ + int i, count, index; + + count = 0; + for(i = 0; i < incount; i++) { + if(smpi_mpi_testany(incount, requests, &index, status)) { + indices[count] = index; + count++; + } + } + return count; } -int smpi_mpi_isend(smpi_mpi_request_t request) +void smpi_mpi_bcast(void *buf, int count, MPI_Datatype datatype, int root, + MPI_Comm comm) { - int retval = MPI_SUCCESS; - int index = smpi_host_index(); + // arity=2: a binary tree, arity=4 seem to be a good setting (see P2P-MPI)) + nary_tree_bcast(buf, count, datatype, root, comm, 4); +} - if (NULL == request) { - retval = MPI_ERR_INTERN; - } else { - SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[index]); - xbt_fifo_push(smpi_global->pending_send_request_queues[index], request); - SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes[index]); +void smpi_mpi_barrier(MPI_Comm comm) +{ + // arity=2: a binary tree, arity=4 seem to be a good setting (see P2P-MPI)) + nary_tree_barrier(comm, 4); +} - if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) { - SIMIX_process_resume(smpi_global->sender_processes[index]); - } - } +void smpi_mpi_gather(void *sendbuf, int sendcount, MPI_Datatype sendtype, + void *recvbuf, int recvcount, MPI_Datatype recvtype, + int root, MPI_Comm comm) +{ + int system_tag = 666; + int rank, size, src, index, sendsize, recvsize; + MPI_Request *requests; + + rank = smpi_comm_rank(comm); + size = smpi_comm_size(comm); + if(rank != root) { + // Send buffer to root + smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm); + } else { + sendsize = smpi_datatype_size(sendtype); + recvsize = smpi_datatype_size(recvtype); + // Local copy from root + memcpy(&((char *) recvbuf)[root * recvcount * recvsize], sendbuf, + sendcount * sendsize * sizeof(char)); + // Receive buffers from senders + requests = xbt_new(MPI_Request, size - 1); + index = 0; + for(src = 0; src < size; src++) { + if(src != root) { + requests[index] = smpi_irecv_init(&((char *) recvbuf) + [src * recvcount * recvsize], + recvcount, recvtype, src, + system_tag, comm); + index++; + } + } + // Wait for completion of irecv's. + smpi_mpi_startall(size - 1, requests); + smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE); + xbt_free(requests); + } +} - return retval; +void smpi_mpi_gatherv(void *sendbuf, int sendcount, MPI_Datatype sendtype, + void *recvbuf, int *recvcounts, int *displs, + MPI_Datatype recvtype, int root, MPI_Comm comm) +{ + int system_tag = 666; + int rank, size, src, index, sendsize; + MPI_Request *requests; + + rank = smpi_comm_rank(comm); + size = smpi_comm_size(comm); + if(rank != root) { + // Send buffer to root + smpi_mpi_send(sendbuf, sendcount, sendtype, root, system_tag, comm); + } else { + sendsize = smpi_datatype_size(sendtype); + // Local copy from root + memcpy(&((char *) recvbuf)[displs[root]], sendbuf, + sendcount * sendsize * sizeof(char)); + // Receive buffers from senders + requests = xbt_new(MPI_Request, size - 1); + index = 0; + for(src = 0; src < size; src++) { + if(src != root) { + requests[index] = + smpi_irecv_init(&((char *) recvbuf)[displs[src]], + recvcounts[src], recvtype, src, system_tag, + comm); + index++; + } + } + // Wait for completion of irecv's. + smpi_mpi_startall(size - 1, requests); + smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE); + xbt_free(requests); + } } -int smpi_mpi_irecv(smpi_mpi_request_t request) +void smpi_mpi_allgather(void *sendbuf, int sendcount, + MPI_Datatype sendtype, void *recvbuf, + int recvcount, MPI_Datatype recvtype, + MPI_Comm comm) { - int retval = MPI_SUCCESS; - int index = smpi_host_index(); + int system_tag = 666; + int rank, size, other, index, sendsize, recvsize; + MPI_Request *requests; + + rank = smpi_comm_rank(comm); + size = smpi_comm_size(comm); + sendsize = smpi_datatype_size(sendtype); + recvsize = smpi_datatype_size(recvtype); + // Local copy from self + memcpy(&((char *) recvbuf)[rank * recvcount * recvsize], sendbuf, + sendcount * sendsize * sizeof(char)); + // Send/Recv buffers to/from others; + requests = xbt_new(MPI_Request, 2 * (size - 1)); + index = 0; + for(other = 0; other < size; other++) { + if(other != rank) { + requests[index] = + smpi_isend_init(sendbuf, sendcount, sendtype, other, system_tag, + comm); + index++; + requests[index] = smpi_irecv_init(&((char *) recvbuf) + [other * recvcount * recvsize], + recvcount, recvtype, other, + system_tag, comm); + index++; + } + } + // Wait for completion of all comms. + smpi_mpi_startall(2 * (size - 1), requests); + smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE); + xbt_free(requests); +} - if (NULL == request) { - retval = MPI_ERR_INTERN; - } else { - SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[index]); - xbt_fifo_push(smpi_global->pending_recv_request_queues[index], request); - SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes[index]); +void smpi_mpi_allgatherv(void *sendbuf, int sendcount, + MPI_Datatype sendtype, void *recvbuf, + int *recvcounts, int *displs, + MPI_Datatype recvtype, MPI_Comm comm) +{ + int system_tag = 666; + int rank, size, other, index, sendsize, recvsize; + MPI_Request *requests; + + rank = smpi_comm_rank(comm); + size = smpi_comm_size(comm); + sendsize = smpi_datatype_size(sendtype); + recvsize = smpi_datatype_size(recvtype); + // Local copy from self + memcpy(&((char *) recvbuf)[displs[rank]], sendbuf, + sendcount * sendsize * sizeof(char)); + // Send buffers to others; + requests = xbt_new(MPI_Request, 2 * (size - 1)); + index = 0; + for(other = 0; other < size; other++) { + if(other != rank) { + requests[index] = + smpi_isend_init(sendbuf, sendcount, sendtype, other, system_tag, + comm); + index++; + requests[index] = + smpi_irecv_init(&((char *) recvbuf)[displs[other]], + recvcounts[other], recvtype, other, system_tag, + comm); + index++; + } + } + // Wait for completion of all comms. + smpi_mpi_startall(2 * (size - 1), requests); + smpi_mpi_waitall(2 * (size - 1), requests, MPI_STATUS_IGNORE); + xbt_free(requests); +} - if (SIMIX_process_is_suspended(smpi_global->receiver_processes[index])) { - SIMIX_process_resume(smpi_global->receiver_processes[index]); - } - } +void smpi_mpi_scatter(void *sendbuf, int sendcount, MPI_Datatype sendtype, + void *recvbuf, int recvcount, MPI_Datatype recvtype, + int root, MPI_Comm comm) +{ + int system_tag = 666; + int rank, size, dst, index, sendsize, recvsize; + MPI_Request *requests; + + rank = smpi_comm_rank(comm); + size = smpi_comm_size(comm); + if(rank != root) { + // Recv buffer from root + smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm, + MPI_STATUS_IGNORE); + } else { + sendsize = smpi_datatype_size(sendtype); + recvsize = smpi_datatype_size(recvtype); + // Local copy from root + memcpy(recvbuf, &((char *) sendbuf)[root * sendcount * sendsize], + recvcount * recvsize * sizeof(char)); + // Send buffers to receivers + requests = xbt_new(MPI_Request, size - 1); + index = 0; + for(dst = 0; dst < size; dst++) { + if(dst != root) { + requests[index] = smpi_isend_init(&((char *) sendbuf) + [dst * sendcount * sendsize], + sendcount, sendtype, dst, + system_tag, comm); + index++; + } + } + // Wait for completion of isend's. + smpi_mpi_startall(size - 1, requests); + smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE); + xbt_free(requests); + } +} - return retval; +void smpi_mpi_scatterv(void *sendbuf, int *sendcounts, int *displs, + MPI_Datatype sendtype, void *recvbuf, int recvcount, + MPI_Datatype recvtype, int root, MPI_Comm comm) +{ + int system_tag = 666; + int rank, size, dst, index, sendsize, recvsize; + MPI_Request *requests; + + rank = smpi_comm_rank(comm); + size = smpi_comm_size(comm); + if(rank != root) { + // Recv buffer from root + smpi_mpi_recv(recvbuf, recvcount, recvtype, root, system_tag, comm, + MPI_STATUS_IGNORE); + } else { + sendsize = smpi_datatype_size(sendtype); + recvsize = smpi_datatype_size(recvtype); + // Local copy from root + memcpy(recvbuf, &((char *) sendbuf)[displs[root]], + recvcount * recvsize * sizeof(char)); + // Send buffers to receivers + requests = xbt_new(MPI_Request, size - 1); + index = 0; + for(dst = 0; dst < size; dst++) { + if(dst != root) { + requests[index] = + smpi_isend_init(&((char *) sendbuf)[displs[dst]], + sendcounts[dst], sendtype, dst, system_tag, + comm); + index++; + } + } + // Wait for completion of isend's. + smpi_mpi_startall(size - 1, requests); + smpi_mpi_waitall(size - 1, requests, MPI_STATUS_IGNORE); + xbt_free(requests); + } } -int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t *status) +void smpi_mpi_reduce(void *sendbuf, void *recvbuf, int count, + MPI_Datatype datatype, MPI_Op op, int root, + MPI_Comm comm) { - int retval = MPI_SUCCESS; + int system_tag = 666; + int rank, size, src, index, datasize; + MPI_Request *requests; + void **tmpbufs; + + rank = smpi_comm_rank(comm); + size = smpi_comm_size(comm); + if(rank != root) { + // Send buffer to root + smpi_mpi_send(sendbuf, count, datatype, root, system_tag, comm); + } else { + datasize = smpi_datatype_size(datatype); + // Local copy from root + memcpy(recvbuf, sendbuf, count * datasize * sizeof(char)); + // Receive buffers from senders + //TODO: make a MPI_barrier here ? + requests = xbt_new(MPI_Request, size - 1); + tmpbufs = xbt_new(void *, size - 1); + index = 0; + for(src = 0; src < size; src++) { + if(src != root) { + tmpbufs[index] = xbt_malloc(count * datasize); + requests[index] = + smpi_irecv_init(tmpbufs[index], count, datatype, src, + system_tag, comm); + index++; + } + } + // Wait for completion of irecv's. + smpi_mpi_startall(size - 1, requests); + for(src = 0; src < size - 1; src++) { + index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE); + if(index == MPI_UNDEFINED) { + break; + } + smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype); + } + for(index = 0; index < size - 1; index++) { + xbt_free(tmpbufs[index]); + } + xbt_free(tmpbufs); + xbt_free(requests); + } +} - if (NULL == request) { - retval = MPI_ERR_INTERN; - } else { - SIMIX_mutex_lock(request->mutex); - while (!request->completed) { - SIMIX_cond_wait(request->cond, request->mutex); - } - if (NULL != status) { - status->MPI_SOURCE = request->src; - status->MPI_TAG = request->tag; - status->MPI_ERROR = MPI_SUCCESS; - } - SIMIX_mutex_unlock(request->mutex); - } +void smpi_mpi_allreduce(void *sendbuf, void *recvbuf, int count, + MPI_Datatype datatype, MPI_Op op, MPI_Comm comm) +{ + smpi_mpi_reduce(sendbuf, recvbuf, count, datatype, op, 0, comm); + smpi_mpi_bcast(recvbuf, count, datatype, 0, comm); + +/* +FIXME: buggy implementation + + int system_tag = 666; + int rank, size, other, index, datasize; + MPI_Request* requests; + void** tmpbufs; + + rank = smpi_comm_rank(comm); + size = smpi_comm_size(comm); + datasize = smpi_datatype_size(datatype); + // Local copy from self + memcpy(recvbuf, sendbuf, count * datasize * sizeof(char)); + // Send/Recv buffers to/from others; + //TODO: make a MPI_barrier here ? + requests = xbt_new(MPI_Request, 2 * (size - 1)); + tmpbufs = xbt_new(void*, size - 1); + index = 0; + for(other = 0; other < size; other++) { + if(other != rank) { + tmpbufs[index / 2] = xbt_malloc(count * datasize); + requests[index] = smpi_mpi_isend(sendbuf, count, datatype, other, system_tag, comm); + requests[index + 1] = smpi_mpi_irecv(tmpbufs[index / 2], count, datatype, other, system_tag, comm); + index += 2; + } + } + // Wait for completion of all comms. + for(other = 0; other < 2 * (size - 1); other++) { + index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE); + if(index == MPI_UNDEFINED) { + break; + } + if((index & 1) == 1) { + // Request is odd: it's a irecv + smpi_op_apply(op, tmpbufs[index / 2], recvbuf, &count, &datatype); + } + } + for(index = 0; index < size - 1; index++) { + xbt_free(tmpbufs[index]); + } + xbt_free(tmpbufs); + xbt_free(requests); +*/ +} - return retval; +void smpi_mpi_scan(void *sendbuf, void *recvbuf, int count, + MPI_Datatype datatype, MPI_Op op, MPI_Comm comm) +{ + int system_tag = 666; + int rank, size, other, index, datasize; + int total; + MPI_Request *requests; + void **tmpbufs; + + rank = smpi_comm_rank(comm); + size = smpi_comm_size(comm); + datasize = smpi_datatype_size(datatype); + // Local copy from self + memcpy(recvbuf, sendbuf, count * datasize * sizeof(char)); + // Send/Recv buffers to/from others; + total = rank + (size - (rank + 1)); + requests = xbt_new(MPI_Request, total); + tmpbufs = xbt_new(void *, rank); + index = 0; + for(other = 0; other < rank; other++) { + tmpbufs[index] = xbt_malloc(count * datasize); + requests[index] = + smpi_irecv_init(tmpbufs[index], count, datatype, other, system_tag, + comm); + index++; + } + for(other = rank + 1; other < size; other++) { + requests[index] = + smpi_isend_init(sendbuf, count, datatype, other, system_tag, comm); + index++; + } + // Wait for completion of all comms. + smpi_mpi_startall(size - 1, requests); + for(other = 0; other < total; other++) { + index = smpi_mpi_waitany(size - 1, requests, MPI_STATUS_IGNORE); + if(index == MPI_UNDEFINED) { + break; + } + if(index < rank) { + // #Request is below rank: it's a irecv + smpi_op_apply(op, tmpbufs[index], recvbuf, &count, &datatype); + } + } + for(index = 0; index < size - 1; index++) { + xbt_free(tmpbufs[index]); + } + xbt_free(tmpbufs); + xbt_free(requests); }