src/smpi/smpi_base.c

   1 #include "private.h"
   2
   3 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_base, smpi, "Logging specific to SMPI (base)");
   4
   5 smpi_mpi_global_t smpi_mpi_global = NULL;
   6
   7 void smpi_mpi_land_func(void *a, void *b, int *length, MPI_Datatype *datatype);
   8
   9 void smpi_mpi_land_func(void *a, void *b, int *length, MPI_Datatype *datatype)
  10 {
  11         int i;
  12         if (*datatype == smpi_mpi_global->mpi_int) {
  13                 int *x = a, *y = b;
  14                 for (i = 0; i < *length; i++) {
  15                         y[i] = x[i] && y[i];
  16                 }
  17         }
  18 }
  19
  20 void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype *datatype);
  21
  22 void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype *datatype)
  23 {
  24         int i;
  25         if (*datatype == smpi_mpi_global->mpi_int) {
  26                 int *x = a, *y = b;
  27                 for (i = 0; i < *length; i++) {
  28                         y[i] = x[i] + y[i];
  29                 }
  30         }
  31 }
  32
  33 int smpi_mpi_comm_rank(smpi_mpi_communicator_t comm)
  34 {
  35         return comm->index_to_rank_map[smpi_host_index()];
  36 }
  37
  38 void smpi_mpi_init()
  39 {
  40         smx_host_t host;
  41         smx_host_t *hosts;
  42         int host_count;
  43         int i;
  44         smpi_host_data_t hdata;
  45
  46         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
  47         smpi_global->running_hosts_count++;
  48         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
  49
  50         // initialize some local variables
  51         host       = SIMIX_host_self();
  52         hosts      = SIMIX_host_get_table();
  53         host_count = SIMIX_host_get_number();
  54
  55         hdata      = xbt_new(s_smpi_host_data_t, 1);
  56
  57         for (i = 0; i < host_count && host != hosts[i]; i ++);
  58
  59         hdata->index = i;
  60
  61         SIMIX_host_set_data(host, hdata);
  62
  63         // node 0 sets the globals
  64         if (0 == i) {
  65
  66                 smpi_global->hosts                              = hosts;
  67                 smpi_global->host_count                         = host_count;
  68
  69                 smpi_mpi_global                                 = xbt_new(s_smpi_mpi_global_t, 1);
  70
  71                 // global communicator
  72                 smpi_mpi_global->mpi_comm_world                 = xbt_new(s_smpi_mpi_communicator_t, 1);
  73                 smpi_mpi_global->mpi_comm_world->size           = host_count;
  74                 smpi_mpi_global->mpi_comm_world->barrier_count  = 0;
  75                 smpi_mpi_global->mpi_comm_world->barrier_mutex  = SIMIX_mutex_init();
  76                 smpi_mpi_global->mpi_comm_world->barrier_cond   = SIMIX_cond_init();
  77                 smpi_mpi_global->mpi_comm_world->rank_to_index_map = xbt_new(int, host_count);
  78                 smpi_mpi_global->mpi_comm_world->index_to_rank_map = xbt_new(int, host_count);
  79                 for (i = 0; i < host_count; i++) {
  80                         smpi_mpi_global->mpi_comm_world->rank_to_index_map[i] = i;
  81                         smpi_mpi_global->mpi_comm_world->index_to_rank_map[i] = i;
  82                 }
  83
  84                 // mpi datatypes
  85                 smpi_mpi_global->mpi_byte                       = xbt_new(s_smpi_mpi_datatype_t, 1);
  86                 smpi_mpi_global->mpi_byte->size                 = (size_t)1;
  87                 smpi_mpi_global->mpi_int                        = xbt_new(s_smpi_mpi_datatype_t, 1);
  88                 smpi_mpi_global->mpi_int->size                  = sizeof(int);
  89                 smpi_mpi_global->mpi_double                     = xbt_new(s_smpi_mpi_datatype_t, 1);
  90                 smpi_mpi_global->mpi_double->size               = sizeof(double);
  91
  92                 // mpi operations
  93                 smpi_mpi_global->mpi_land                       = xbt_new(s_smpi_mpi_op_t, 1);
  94                 smpi_mpi_global->mpi_land->func                 = smpi_mpi_land_func;
  95                 smpi_mpi_global->mpi_sum                        = xbt_new(s_smpi_mpi_op_t, 1);
  96                 smpi_mpi_global->mpi_sum->func                  = smpi_mpi_sum_func;
  97
  98                 // signal all nodes to perform initialization
  99                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 100                 smpi_global->root_ready = 1;
 101                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 102                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 103
 104         } else {
 105
 106                 // make sure root is done before own initialization
 107                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 108                 while (!smpi_global->root_ready) {
 109                         SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 110                 }
 111                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 112
 113         }
 114
 115         // wait for all nodes to signal initializatin complete
 116         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 117         smpi_global->ready_process_count++;
 118         if (smpi_global->ready_process_count < 3 * host_count) {
 119                 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 120         } else {
 121                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 122         }
 123         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 124
 125         return;
 126 }
 127
 128 void smpi_mpi_finalize()
 129 {
 130         int i;
 131
 132         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
 133         i = --smpi_global->running_hosts_count;
 134         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
 135
 136         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 137         smpi_global->ready_process_count--;
 138         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 139
 140         if (0 >= i) {
 141
 142                 // wake up senders/receivers
 143                 for (i = 0; i < smpi_global->host_count; i++) {
 144                         if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
 145                                 SIMIX_process_resume(smpi_global->sender_processes[i]);
 146                         }
 147                         if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
 148                                 SIMIX_process_resume(smpi_global->receiver_processes[i]);
 149                         }
 150                 }
 151
 152                 SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 153                 SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 154                 xbt_free(smpi_mpi_global->mpi_comm_world);
 155
 156                 xbt_free(smpi_mpi_global->mpi_byte);
 157                 xbt_free(smpi_mpi_global->mpi_int);
 158                 xbt_free(smpi_mpi_global->mpi_double);
 159
 160                 xbt_free(smpi_mpi_global->mpi_land);
 161                 xbt_free(smpi_mpi_global->mpi_sum);
 162
 163                 xbt_free(smpi_mpi_global);
 164
 165         }
 166
 167 }
 168
 169 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 170 {
 171
 172         SIMIX_mutex_lock(comm->barrier_mutex);
 173         if(++comm->barrier_count < comm->size) {
 174                 SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 175         } else {
 176                 comm->barrier_count = 0;
 177                 SIMIX_cond_broadcast(comm->barrier_cond);
 178         }
 179         SIMIX_mutex_unlock(comm->barrier_mutex);
 180
 181         return MPI_SUCCESS;
 182 }
 183
 184 int smpi_mpi_isend(smpi_mpi_request_t request)
 185 {
 186         int retval = MPI_SUCCESS;
 187         int index  = smpi_host_index();
 188
 189         if (NULL == request) {
 190                 retval = MPI_ERR_INTERN;
 191         } else {
 192                 SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[index]);
 193                 xbt_fifo_push(smpi_global->pending_send_request_queues[index], request);
 194                 SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes[index]);
 195
 196                 if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) {
 197                         SIMIX_process_resume(smpi_global->sender_processes[index]);
 198                 }
 199         }
 200
 201         return retval;
 202 }
 203
 204 int smpi_mpi_irecv(smpi_mpi_request_t request)
 205 {
 206         int retval = MPI_SUCCESS;
 207         int index = smpi_host_index();
 208
 209         if (NULL == request) {
 210                 retval = MPI_ERR_INTERN;
 211         } else {
 212                 SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[index]);
 213                 xbt_fifo_push(smpi_global->pending_recv_request_queues[index], request);
 214                 SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes[index]);
 215
 216                 if (SIMIX_process_is_suspended(smpi_global->receiver_processes[index])) {
 217                         SIMIX_process_resume(smpi_global->receiver_processes[index]);
 218                 }
 219         }
 220
 221         return retval;
 222 }
 223
 224 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t *status)
 225 {
 226         int retval = MPI_SUCCESS;
 227
 228         if (NULL == request) {
 229                 retval = MPI_ERR_INTERN;
 230         } else {
 231                 SIMIX_mutex_lock(request->mutex);
 232                 while (!request->completed) {
 233                         SIMIX_cond_wait(request->cond, request->mutex);
 234                 }
 235                 if (NULL != status) {
 236                         status->MPI_SOURCE = request->src;
 237                         status->MPI_TAG    = request->tag;
 238                         status->MPI_ERROR  = MPI_SUCCESS;
 239                 }
 240                 SIMIX_mutex_unlock(request->mutex);
 241         }
 242
 243         return retval;
 244 }