--- /dev/null
+#include <stdio.h>
+#include <signal.h>
+#include <sys/time.h>
+
+#include "private.h"
+
+SMPI_Global_t smpi_global = NULL;
+
+SMPI_MPI_Global_t smpi_mpi_global = NULL;
+
+XBT_LOG_NEW_DEFAULT_CATEGORY(smpi, "SMPI");
+
+int inline smpi_mpi_comm_size(smpi_mpi_communicator_t *comm)
+{
+ return comm->size;
+}
+
+// FIXME: smarter algorithm?
+int smpi_mpi_comm_rank(smpi_mpi_communicator_t *comm, smx_host_t host)
+{
+ int i;
+
+ for(i = comm->size - 1; i > 0 && host != comm->hosts[i]; i--);
+
+ return i;
+}
+
+int inline smpi_mpi_comm_rank_self(smpi_mpi_communicator_t *comm)
+{
+ return smpi_mpi_comm_rank(comm, SIMIX_host_self());
+}
+
+//int smpi_mpi_comm_world_rank_self()
+//{
+// return smpi_mpi_comm_rank(smpi_mpi_global->mpi_comm_world, SIMIX_host_self());
+//}
+
+int smpi_sender(int argc, char **argv)
+{
+ smx_process_t self;
+ smx_host_t shost;
+ int rank;
+
+ xbt_fifo_t request_queue;
+ smx_mutex_t request_queue_mutex;
+ int size;
+
+ int running_hosts_count;
+
+ smpi_mpi_request_t *request;
+
+ smx_host_t dhost;
+
+ smx_action_t communicate_action;
+
+ smpi_received_message_t *message;
+
+ int drank;
+
+ smx_process_t receiver_process;
+
+ self = SIMIX_process_self();
+ shost = SIMIX_host_self();
+ rank = smpi_mpi_comm_rank(smpi_mpi_global->mpi_comm_world, shost);
+
+ // make sure root is done before own initialization
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ if (!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);
+
+ request_queue = smpi_global->pending_send_request_queues[rank];
+ request_queue_mutex = smpi_global->pending_send_request_queues_mutexes[rank];
+ size = smpi_mpi_comm_size(smpi_mpi_global->mpi_comm_world);
+
+ smpi_global->sender_processes[rank] = self;
+
+ // 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 * size) {
+ SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
+ } else {
+ SIMIX_cond_broadcast(smpi_global->start_stop_cond);
+ }
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ do {
+
+ SIMIX_mutex_lock(request_queue_mutex);
+ request = xbt_fifo_shift(request_queue);
+ SIMIX_mutex_unlock(request_queue_mutex);
+
+ if (NULL == request) {
+ SIMIX_process_suspend(self);
+ } else {
+
+ SIMIX_mutex_lock(request->mutex);
+
+ // copy request to appropriate received queue
+ message = xbt_mallocator_get(smpi_global->message_mallocator);
+ message->comm = request->comm;
+ message->src = request->src;
+ message->dst = request->dst;
+ message->tag = request->tag;
+ message->buf = xbt_malloc(request->datatype->size * request->count);
+ memcpy(message->buf, request->buf, request->datatype->size * request->count);
+
+ dhost = request->comm->hosts[request->dst];
+ drank = smpi_mpi_comm_rank(smpi_mpi_global->mpi_comm_world, dhost);
+
+ SIMIX_mutex_lock(smpi_global->received_message_queues_mutexes[drank]);
+ xbt_fifo_push(smpi_global->received_message_queues[drank], message);
+ SIMIX_mutex_unlock(smpi_global->received_message_queues_mutexes[drank]);
+
+ request->completed = 1;
+
+ communicate_action = SIMIX_action_communicate(shost, dhost,
+ NULL, request->datatype->size * request->count * 1.0, -1.0);
+
+ SIMIX_register_condition_to_action(communicate_action, request->cond);
+ SIMIX_register_action_to_condition(communicate_action, request->cond);
+
+ SIMIX_cond_wait(request->cond, request->mutex);
+
+ SIMIX_mutex_unlock(request->mutex);
+
+ // wake up receiver if necessary
+ receiver_process = smpi_global->receiver_processes[drank];
+
+ if (SIMIX_process_is_suspended(receiver_process)) {
+ SIMIX_process_resume(receiver_process);
+ }
+
+ }
+
+ SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
+ running_hosts_count = smpi_global->running_hosts_count;
+ SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
+
+ } while (0 < running_hosts_count);
+
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ smpi_global->ready_process_count--;
+ if (smpi_global->ready_process_count == 0) {
+ SIMIX_cond_broadcast(smpi_global->start_stop_cond);
+ } else if (smpi_global->ready_process_count < 0) {
+ // FIXME: can't happen! abort!
+ }
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ return 0;
+}
+
+int smpi_receiver(int argc, char **argv)
+{
+ smx_process_t self;
+ int rank;
+
+ xbt_fifo_t request_queue;
+ smx_mutex_t request_queue_mutex;
+ xbt_fifo_t message_queue;
+ smx_mutex_t message_queue_mutex;
+ int size;
+
+ int running_hosts_count;
+
+ smpi_mpi_request_t *request;
+ smpi_received_message_t *message;
+
+ xbt_fifo_item_t request_item;
+ xbt_fifo_item_t message_item;
+
+ self = SIMIX_process_self();
+ rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
+
+ // make sure root is done before own initialization
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ if (!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);
+
+ request_queue = smpi_global->pending_recv_request_queues[rank];
+ request_queue_mutex = smpi_global->pending_recv_request_queues_mutexes[rank];
+ message_queue = smpi_global->received_message_queues[rank];
+ message_queue_mutex = smpi_global->received_message_queues_mutexes[rank];
+ size = smpi_mpi_comm_size(smpi_mpi_global->mpi_comm_world);
+
+ smpi_global->receiver_processes[rank] = self;
+
+ // 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 * size) {
+ SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
+ } else {
+ SIMIX_cond_broadcast(smpi_global->start_stop_cond);
+ }
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ do {
+ request = NULL;
+ message = NULL;
+
+ // FIXME: better algorithm, maybe some kind of balanced tree? or a heap?
+
+ // FIXME: not the best way to request multiple locks...
+ SIMIX_mutex_lock(request_queue_mutex);
+ SIMIX_mutex_lock(message_queue_mutex);
+ for (request_item = xbt_fifo_get_first_item(request_queue);
+ NULL != request_item;
+ request_item = xbt_fifo_get_next_item(request_item)) {
+ request = xbt_fifo_get_item_content(request_item);
+ for (message_item = xbt_fifo_get_first_item(message_queue);
+ NULL != message_item;
+ message_item = xbt_fifo_get_next_item(message_item)) {
+ message = xbt_fifo_get_item_content(message_item);
+ if (request->comm == message->comm &&
+ (MPI_ANY_SOURCE == request->src || request->src == message->src) &&
+ request->tag == message->tag) {
+ xbt_fifo_remove_item(request_queue, request_item);
+ xbt_fifo_remove_item(message_queue, message_item);
+ goto stopsearch;
+ }
+ }
+ }
+stopsearch:
+ SIMIX_mutex_unlock(message_queue_mutex);
+ SIMIX_mutex_unlock(request_queue_mutex);
+
+ if (NULL == request || NULL == message) {
+ SIMIX_process_suspend(self);
+ } else {
+ SIMIX_mutex_lock(request->mutex);
+
+ memcpy(request->buf, message->buf, request->datatype->size * request->count);
+ request->src = message->src;
+ request->completed = 1;
+ SIMIX_cond_broadcast(request->cond);
+
+ SIMIX_mutex_unlock(request->mutex);
+
+ xbt_free(message->buf);
+ xbt_mallocator_release(smpi_global->message_mallocator, message);
+ }
+
+ SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
+ running_hosts_count = smpi_global->running_hosts_count;
+ SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
+
+ } while (0 < running_hosts_count);
+
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ smpi_global->ready_process_count--;
+ if (smpi_global->ready_process_count == 0) {
+ SIMIX_cond_broadcast(smpi_global->start_stop_cond);
+ } else if (smpi_global->ready_process_count < 0) {
+ // FIXME: can't happen, abort!
+ }
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ return 0;
+}
+
+void *smpi_request_new()
+{
+ smpi_mpi_request_t *request = xbt_new(smpi_mpi_request_t, 1);
+
+ request->completed = 0;
+ request->mutex = SIMIX_mutex_init();
+ request->cond = SIMIX_cond_init();
+
+ return request;
+}
+
+void smpi_request_free(void *pointer)
+{
+
+ smpi_mpi_request_t *request = pointer;
+
+ if (NULL != request) {
+ SIMIX_cond_destroy(request->cond);
+ SIMIX_mutex_destroy(request->mutex);
+ xbt_free(request);
+ }
+
+ return;
+}
+
+void smpi_request_reset(void *pointer)
+{
+ return;
+}
+
+
+void *smpi_message_new()
+{
+ return xbt_new(smpi_received_message_t, 1);
+}
+
+void smpi_message_free(void *pointer)
+{
+ if (NULL != pointer) {
+ xbt_free(pointer);
+ }
+
+ return;
+}
+
+void smpi_message_reset(void *pointer)
+{
+ return;
+}
+
+void smpi_global_init()
+{
+ int i;
+
+ int size = SIMIX_host_get_number();
+
+ smpi_global = xbt_new(s_SMPI_Global_t, 1);
+
+ // config variable
+ smpi_global->reference_speed = SMPI_DEFAULT_SPEED;
+
+ smpi_global->root_ready = 0;
+ smpi_global->ready_process_count = 0;
+
+ // start/stop
+ smpi_global->start_stop_mutex = SIMIX_mutex_init();
+ smpi_global->start_stop_cond = SIMIX_cond_init();
+
+ // processes
+ smpi_global->sender_processes = xbt_new(smx_process_t, size);
+ smpi_global->receiver_processes = xbt_new(smx_process_t, size);
+
+ // running hosts
+ smpi_global->running_hosts_count_mutex = SIMIX_mutex_init();
+ smpi_global->running_hosts_count = 0;
+
+ // mallocators
+ smpi_global->request_mallocator = xbt_mallocator_new(SMPI_REQUEST_MALLOCATOR_SIZE,
+ smpi_request_new, smpi_request_free, smpi_request_reset);
+ smpi_global->message_mallocator = xbt_mallocator_new(SMPI_MESSAGE_MALLOCATOR_SIZE,
+ smpi_message_new, smpi_message_free, smpi_message_reset);
+
+ //
+ smpi_global->pending_send_request_queues = xbt_new(xbt_fifo_t, size);
+ smpi_global->pending_send_request_queues_mutexes = xbt_new(smx_mutex_t, size);
+ smpi_global->pending_recv_request_queues = xbt_new(xbt_fifo_t, size);
+ smpi_global->pending_recv_request_queues_mutexes = xbt_new(smx_mutex_t, size);
+ smpi_global->received_message_queues = xbt_new(xbt_fifo_t, size);
+ smpi_global->received_message_queues_mutexes = xbt_new(smx_mutex_t, size);
+ smpi_global->timers = xbt_new(xbt_os_timer_t, size);
+ smpi_global->timers_mutexes = xbt_new(smx_mutex_t, size);
+
+ for(i = 0; i < size; i++) {
+ smpi_global->pending_send_request_queues[i] = xbt_fifo_new();
+ smpi_global->pending_send_request_queues_mutexes[i] = SIMIX_mutex_init();
+ smpi_global->pending_recv_request_queues[i] = xbt_fifo_new();
+ smpi_global->pending_recv_request_queues_mutexes[i] = SIMIX_mutex_init();
+ smpi_global->received_message_queues[i] = xbt_fifo_new();
+ smpi_global->received_message_queues_mutexes[i] = SIMIX_mutex_init();
+ smpi_global->timers[i] = xbt_os_timer_new();
+ smpi_global->timers_mutexes[i] = SIMIX_mutex_init();
+ }
+
+}
+
+void smpi_global_destroy()
+{
+ int i;
+
+ int size = SIMIX_host_get_number();
+
+ // start/stop
+ SIMIX_mutex_destroy(smpi_global->start_stop_mutex);
+ SIMIX_cond_destroy(smpi_global->start_stop_cond);
+
+ // processes
+ xbt_free(smpi_global->sender_processes);
+ xbt_free(smpi_global->receiver_processes);
+
+ // running hosts
+ SIMIX_mutex_destroy(smpi_global->running_hosts_count_mutex);
+
+ // mallocators
+ xbt_mallocator_free(smpi_global->request_mallocator);
+ xbt_mallocator_free(smpi_global->message_mallocator);
+
+ for(i = 0; i < size; i++) {
+ xbt_fifo_free(smpi_global->pending_send_request_queues[i]);
+ SIMIX_mutex_destroy(smpi_global->pending_send_request_queues_mutexes[i]);
+ xbt_fifo_free(smpi_global->pending_recv_request_queues[i]);
+ SIMIX_mutex_destroy(smpi_global->pending_recv_request_queues_mutexes[i]);
+ xbt_fifo_free(smpi_global->received_message_queues[i]);
+ SIMIX_mutex_destroy(smpi_global->received_message_queues_mutexes[i]);
+ xbt_os_timer_free(smpi_global->timers[i]);
+ SIMIX_mutex_destroy(smpi_global->timers_mutexes[i]);
+ }
+
+ xbt_free(smpi_global->pending_send_request_queues);
+ xbt_free(smpi_global->pending_send_request_queues_mutexes);
+ xbt_free(smpi_global->pending_recv_request_queues);
+ xbt_free(smpi_global->pending_recv_request_queues_mutexes);
+ xbt_free(smpi_global->received_message_queues);
+ xbt_free(smpi_global->received_message_queues_mutexes);
+ xbt_free(smpi_global->timers);
+ xbt_free(smpi_global->timers_mutexes);
+
+ xbt_free(smpi_global);
+}
+
+int smpi_run_simulation(int argc, char **argv)
+{
+ smx_cond_t cond = NULL;
+ smx_action_t action = NULL;
+
+ xbt_fifo_t actions_failed = xbt_fifo_new();
+ xbt_fifo_t actions_done = xbt_fifo_new();
+
+ srand(SMPI_RAND_SEED);
+
+ SIMIX_global_init(&argc, argv);
+
+ SIMIX_function_register("smpi_simulated_main", smpi_simulated_main);
+ SIMIX_function_register("smpi_sender", smpi_sender);
+ SIMIX_function_register("smpi_receiver", smpi_receiver);
+
+ // FIXME: ought to verify these files...
+ SIMIX_create_environment(argv[1]);
+
+ // must initialize globals between creating environment and launching app....
+ smpi_global_init();
+
+ SIMIX_launch_application(argv[2]);
+
+ /* Prepare to display some more info when dying on Ctrl-C pressing */
+ // FIXME: doesn't work
+ //signal(SIGINT, inthandler);
+
+ /* Clean IO before the run */
+ fflush(stdout);
+ fflush(stderr);
+
+ while (SIMIX_solve(actions_done, actions_failed) != -1.0) {
+ while ((action = xbt_fifo_pop(actions_failed))) {
+ DEBUG1("** %s failed **", action->name);
+ while ((cond = xbt_fifo_pop(action->cond_list))) {
+ SIMIX_cond_broadcast(cond);
+ }
+ SIMIX_action_destroy(action);
+ }
+ while ((action = xbt_fifo_pop(actions_done))) {
+ DEBUG1("** %s done **",action->name);
+ while ((cond = xbt_fifo_pop(action->cond_list))) {
+ SIMIX_cond_broadcast(cond);
+ }
+ SIMIX_action_destroy(action);
+ }
+ }
+
+ xbt_fifo_free(actions_failed);
+ xbt_fifo_free(actions_done);
+
+ INFO1("simulation time %g", SIMIX_get_clock());
+
+ smpi_global_destroy();
+
+ SIMIX_clean();
+
+ return 0;
+}
+
+void smpi_mpi_land_func(void *x, void *y, void *z)
+{
+ *(int *)z = *(int *)x && *(int *)y;
+}
+
+void smpi_mpi_sum_func(void *x, void *y, void *z)
+{
+ *(int *)z = *(int *)x + *(int *)y;
+}
+
+
+void smpi_mpi_init()
+{
+ smx_process_t process;
+ smx_host_t host;
+ smx_host_t *hosts;
+ int size;
+
+ 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
+ process = SIMIX_process_self();
+ host = SIMIX_host_self();
+ hosts = SIMIX_host_get_table();
+ size = SIMIX_host_get_number();
+
+ // node 0 sets the globals
+ if (host == hosts[0]) {
+
+ smpi_mpi_global = xbt_new(s_SMPI_MPI_Global_t, 1);
+
+ // global communicator
+ smpi_mpi_global->mpi_comm_world = xbt_new(smpi_mpi_communicator_t, 1);
+ smpi_mpi_global->mpi_comm_world->size = size;
+ 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->hosts = hosts;
+ smpi_mpi_global->mpi_comm_world->processes = xbt_new(smx_process_t, size);
+ smpi_mpi_global->mpi_comm_world->processes[0] = process;
+
+ // mpi datatypes
+ smpi_mpi_global->mpi_byte = xbt_new(smpi_mpi_datatype_t, 1);
+ smpi_mpi_global->mpi_byte->size = (size_t)1;
+ smpi_mpi_global->mpi_int = xbt_new(smpi_mpi_datatype_t, 1);
+ smpi_mpi_global->mpi_int->size = sizeof(int);
+ smpi_mpi_global->mpi_double = xbt_new(smpi_mpi_datatype_t, 1);
+ smpi_mpi_global->mpi_double->size = sizeof(double);
+
+ // mpi operations
+ smpi_mpi_global->mpi_land = xbt_new(smpi_mpi_op_t, 1);
+ smpi_mpi_global->mpi_land->func = smpi_mpi_land_func;
+ smpi_mpi_global->mpi_sum = xbt_new(smpi_mpi_op_t, 1);
+ smpi_mpi_global->mpi_sum->func = smpi_mpi_sum_func;
+
+ // 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);
+
+ } else {
+
+ // make sure root is done before own initialization
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ if (!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);
+
+ smpi_mpi_global->mpi_comm_world->processes[smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world)] = process;
+ }
+
+ // 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 * size) {
+ SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
+ } else {
+ SIMIX_cond_broadcast(smpi_global->start_stop_cond);
+ }
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ return;
+}
+
+void smpi_mpi_finalize()
+{
+ 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);
+
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ smpi_global->ready_process_count--;
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ if (0 >= i) {
+
+ // wake up senders/receivers
+ for (i = 0; i < smpi_mpi_global->mpi_comm_world->size; 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]);
+ }
+ }
+
+ // wait for senders/receivers to exit...
+ SIMIX_mutex_lock(smpi_global->start_stop_mutex);
+ if (smpi_global->ready_process_count > 0) {
+ SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
+ }
+ SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
+
+ 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->processes);
+ xbt_free(smpi_mpi_global->mpi_comm_world);
+
+ xbt_free(smpi_mpi_global->mpi_byte);
+ xbt_free(smpi_mpi_global->mpi_int);
+ xbt_free(smpi_mpi_global->mpi_double);
+
+ xbt_free(smpi_mpi_global->mpi_land);
+ xbt_free(smpi_mpi_global->mpi_sum);
+
+ xbt_free(smpi_mpi_global);
+ }
+
+}
+
+// FIXME: could cause trouble with multithreaded procs on same host...
+void smpi_bench_begin()
+{
+ int rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
+ SIMIX_mutex_lock(smpi_global->timers_mutexes[rank]);
+ xbt_os_timer_start(smpi_global->timers[rank]);
+ return;
+}
+
+void smpi_bench_end()
+{
+ int rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
+ double duration;
+ smx_host_t host;
+ smx_action_t compute_action;
+ smx_mutex_t mutex;
+ smx_cond_t cond;
+
+ xbt_os_timer_stop(smpi_global->timers[rank]);
+
+ duration = xbt_os_timer_elapsed(smpi_global->timers[rank]);
+ SIMIX_mutex_unlock(smpi_global->timers_mutexes[rank]);
+
+ host = smpi_mpi_global->mpi_comm_world->hosts[rank];
+ compute_action = SIMIX_action_execute(host, NULL, duration * SMPI_DEFAULT_SPEED);
+ mutex = SIMIX_mutex_init();
+ cond = SIMIX_cond_init();
+
+ SIMIX_register_condition_to_action(compute_action, cond);
+ SIMIX_register_action_to_condition(compute_action, cond);
+ SIMIX_mutex_lock(mutex);
+ SIMIX_cond_wait(cond, mutex);
+ SIMIX_mutex_unlock(mutex);
+
+ SIMIX_mutex_destroy(mutex);
+ SIMIX_cond_destroy(cond);
+
+ // FIXME: check for success/failure?
+
+ return;
+}
+
+void smpi_barrier(smpi_mpi_communicator_t *comm)
+{
+
+ SIMIX_mutex_lock(comm->barrier_mutex);
+ if(++comm->barrier_count < comm->size) {
+ SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
+ } else {
+ comm->barrier_count = 0;
+ SIMIX_cond_broadcast(comm->barrier_cond);
+ }
+ SIMIX_mutex_unlock(comm->barrier_mutex);
+
+ return;
+}
+
+// FIXME: smarter algorithm...
+int smpi_comm_rank(smpi_mpi_communicator_t *comm, smx_host_t host)
+{
+ int i;
+ for(i = 0; i < comm->size && host != comm->hosts[i]; i++);
+ if (i >= comm->size) i = -1;
+ return i;
+}
+
+int smpi_create_request(void *buf, int count, smpi_mpi_datatype_t *datatype,
+ int src, int dst, int tag, smpi_mpi_communicator_t *comm, smpi_mpi_request_t **request)
+{
+ int retval = MPI_SUCCESS;
+
+ *request = NULL;
+
+ if (0 > count) {
+ retval = MPI_ERR_COUNT;
+ } else if (NULL == buf) {
+ retval = MPI_ERR_INTERN;
+ } else if (NULL == datatype) {
+ retval = MPI_ERR_TYPE;
+ } else if (NULL == comm) {
+ retval = MPI_ERR_COMM;
+ } else if (MPI_ANY_SOURCE != src && (0 > src || comm->size <= src)) {
+ retval = MPI_ERR_RANK;
+ } else if (0 > dst || comm->size <= dst) {
+ retval = MPI_ERR_RANK;
+ } else if (0 > tag) {
+ retval = MPI_ERR_TAG;
+ } else {
+ *request = xbt_mallocator_get(smpi_global->request_mallocator);
+ (*request)->comm = comm;
+ (*request)->src = src;
+ (*request)->dst = dst;
+ (*request)->tag = tag;
+ (*request)->buf = buf;
+ (*request)->count = count;
+ (*request)->datatype = datatype;
+ }
+ return retval;
+}
+
+int smpi_isend(smpi_mpi_request_t *request)
+{
+ int retval = MPI_SUCCESS;
+ int rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
+
+ if (NULL != request) {
+ SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[rank]);
+ xbt_fifo_push(smpi_global->pending_send_request_queues[rank], request);
+ SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes[rank]);
+ }
+
+ if (SIMIX_process_is_suspended(smpi_global->sender_processes[rank])) {
+ SIMIX_process_resume(smpi_global->sender_processes[rank]);
+ }
+
+ return retval;
+}
+
+int smpi_irecv(smpi_mpi_request_t *request)
+{
+ int retval = MPI_SUCCESS;
+ int rank = smpi_mpi_comm_rank_self(smpi_mpi_global->mpi_comm_world);
+
+ if (NULL != request) {
+ SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[rank]);
+ xbt_fifo_push(smpi_global->pending_recv_request_queues[rank], request);
+ SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes[rank]);
+ }
+
+ if (SIMIX_process_is_suspended(smpi_global->receiver_processes[rank])) {
+ SIMIX_process_resume(smpi_global->receiver_processes[rank]);
+ }
+
+ return retval;
+}
+
+void smpi_wait(smpi_mpi_request_t *request, smpi_mpi_status_t *status)
+{
+ if (NULL != request) {
+ SIMIX_mutex_lock(request->mutex);
+ if (!request->completed) {
+ SIMIX_cond_wait(request->cond, request->mutex);
+ }
+ if (NULL != status) {
+ status->MPI_SOURCE = request->src;
+ }
+ SIMIX_mutex_unlock(request->mutex);
+ }
+}
+
+// FIXME: move into own file
+int smpi_gettimeofday(struct timeval *tv, struct timezone *tz)
+{
+ double now;
+ int retval = 0;
+ smpi_bench_end();
+ if (NULL == tv) {
+ retval = -1;
+ } else {
+ now = SIMIX_get_clock();
+ tv->tv_sec = now;
+ tv->tv_usec = ((now - (double)tv->tv_sec) * 1000000.0);
+ }
+ smpi_bench_begin();
+ return retval;
+}
+
+unsigned int smpi_sleep(unsigned int seconds)
+{
+ smx_mutex_t mutex;
+ smx_cond_t cond;
+ smx_host_t host;
+ smx_action_t sleep_action;
+
+ smpi_bench_end();
+ host = SIMIX_host_self();
+ sleep_action = SIMIX_action_sleep(host, seconds);
+ mutex = SIMIX_mutex_init();
+ cond = SIMIX_cond_init();
+
+ SIMIX_register_condition_to_action(sleep_action, cond);
+ SIMIX_register_action_to_condition(sleep_action, cond);
+ SIMIX_mutex_lock(mutex);
+ SIMIX_cond_wait(cond, mutex);
+ SIMIX_mutex_unlock(mutex);
+
+ SIMIX_mutex_destroy(mutex);
+ SIMIX_cond_destroy(cond);
+
+ // FIXME: check for success/failure?
+
+ smpi_bench_begin();
+ return 0;
+}
+
+void smpi_exit(int status)
+{
+ smpi_bench_end();
+ SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
+ smpi_global->running_hosts_count--;
+ SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
+ SIMIX_process_kill(SIMIX_process_self());
+ return;
+}
