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         hdata->mutex = SIMIX_mutex_init();
  61         hdata->cond  = SIMIX_cond_init();
  62
  63         SIMIX_host_set_data(host, hdata);
  64
  65         // node 0 sets the globals
  66         if (0 == i) {
  67
  68                 smpi_global->hosts                              = hosts;
  69                 smpi_global->host_count                         = host_count;
  70
  71                 smpi_mpi_global                                 = xbt_new(s_smpi_mpi_global_t, 1);
  72
  73                 // global communicator
  74                 smpi_mpi_global->mpi_comm_world                 = xbt_new(s_smpi_mpi_communicator_t, 1);
  75                 smpi_mpi_global->mpi_comm_world->size           = host_count;
  76                 smpi_mpi_global->mpi_comm_world->barrier_count  = 0;
  77                 smpi_mpi_global->mpi_comm_world->barrier_mutex  = SIMIX_mutex_init();
  78                 smpi_mpi_global->mpi_comm_world->barrier_cond   = SIMIX_cond_init();
  79                 smpi_mpi_global->mpi_comm_world->rank_to_index_map = xbt_new(int, host_count);
  80                 smpi_mpi_global->mpi_comm_world->index_to_rank_map = xbt_new(int, host_count);
  81                 for (i = 0; i < host_count; i++) {
  82                         smpi_mpi_global->mpi_comm_world->rank_to_index_map[i] = i;
  83                         smpi_mpi_global->mpi_comm_world->index_to_rank_map[i] = i;
  84                 }
  85
  86                 // mpi datatypes
  87                 smpi_mpi_global->mpi_byte                       = xbt_new(s_smpi_mpi_datatype_t, 1);
  88                 smpi_mpi_global->mpi_byte->size                 = (size_t)1;
  89                 smpi_mpi_global->mpi_int                        = xbt_new(s_smpi_mpi_datatype_t, 1);
  90                 smpi_mpi_global->mpi_int->size                  = sizeof(int);
  91                 smpi_mpi_global->mpi_double                     = xbt_new(s_smpi_mpi_datatype_t, 1);
  92                 smpi_mpi_global->mpi_double->size               = sizeof(double);
  93
  94                 // mpi operations
  95                 smpi_mpi_global->mpi_land                       = xbt_new(s_smpi_mpi_op_t, 1);
  96                 smpi_mpi_global->mpi_land->func                 = smpi_mpi_land_func;
  97                 smpi_mpi_global->mpi_sum                        = xbt_new(s_smpi_mpi_op_t, 1);
  98                 smpi_mpi_global->mpi_sum->func                  = smpi_mpi_sum_func;
  99
 100                 // signal all nodes to perform initialization
 101                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 102                 smpi_global->root_ready = 1;
 103                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 104                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 105
 106         } else {
 107
 108                 // make sure root is done before own initialization
 109                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 110                 while (!smpi_global->root_ready) {
 111                         SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 112                 }
 113                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 114
 115         }
 116
 117         // wait for all nodes to signal initializatin complete
 118         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 119         smpi_global->ready_process_count++;
 120         if (smpi_global->ready_process_count >= 3 * host_count) {
 121                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 122         }
 123         while (smpi_global->ready_process_count < 3 * host_count) {
 124                 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 125         }
 126         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 127
 128         return;
 129 }
 130
 131 void smpi_mpi_finalize()
 132 {
 133         int i;
 134
 135         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
 136         i = --smpi_global->running_hosts_count;
 137         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
 138
 139         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 140         smpi_global->ready_process_count--;
 141         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 142
 143         SIMIX_mutex_destroy(smpi_host_mutex());
 144         SIMIX_cond_destroy(smpi_host_cond());
 145
 146         if (0 >= i) {
 147
 148                 // wake up senders/receivers
 149                 for (i = 0; i < smpi_global->host_count; i++) {
 150                         if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
 151                                 SIMIX_process_resume(smpi_global->sender_processes[i]);
 152                         }
 153                         if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
 154                                 SIMIX_process_resume(smpi_global->receiver_processes[i]);
 155                         }
 156                 }
 157
 158                 SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 159                 SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 160                 xbt_free(smpi_mpi_global->mpi_comm_world);
 161
 162                 xbt_free(smpi_mpi_global->mpi_byte);
 163                 xbt_free(smpi_mpi_global->mpi_int);
 164                 xbt_free(smpi_mpi_global->mpi_double);
 165
 166                 xbt_free(smpi_mpi_global->mpi_land);
 167                 xbt_free(smpi_mpi_global->mpi_sum);
 168
 169                 xbt_free(smpi_mpi_global);
 170
 171         }
 172
 173 }
 174
 175 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 176 {
 177
 178         SIMIX_mutex_lock(comm->barrier_mutex);
 179         ++comm->barrier_count;
 180         if (comm->barrier_count > comm->size) { // only happens on second barrier...
 181                 comm->barrier_count = 0;
 182         } else if (comm->barrier_count == comm->size) {
 183                 SIMIX_cond_broadcast(comm->barrier_cond);
 184         }
 185         while (comm->barrier_count < comm->size) {
 186                 SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 187         }
 188         SIMIX_mutex_unlock(comm->barrier_mutex);
 189
 190         return MPI_SUCCESS;
 191 }
 192
 193 int smpi_mpi_isend(smpi_mpi_request_t request)
 194 {
 195         int retval = MPI_SUCCESS;
 196         int index  = smpi_host_index();
 197
 198         if (NULL == request) {
 199                 retval = MPI_ERR_INTERN;
 200         } else {
 201                 SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[index]);
 202                 xbt_fifo_push(smpi_global->pending_send_request_queues[index], request);
 203                 SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes[index]);
 204
 205                 if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) {
 206                         SIMIX_process_resume(smpi_global->sender_processes[index]);
 207                 }
 208         }
 209
 210         return retval;
 211 }
 212
 213 int smpi_mpi_irecv(smpi_mpi_request_t request)
 214 {
 215         int retval = MPI_SUCCESS;
 216         int index = smpi_host_index();
 217
 218         if (NULL == request) {
 219                 retval = MPI_ERR_INTERN;
 220         } else {
 221                 SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[index]);
 222                 xbt_fifo_push(smpi_global->pending_recv_request_queues[index], request);
 223                 SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes[index]);
 224
 225                 if (SIMIX_process_is_suspended(smpi_global->receiver_processes[index])) {
 226                         SIMIX_process_resume(smpi_global->receiver_processes[index]);
 227                 }
 228         }
 229
 230         return retval;
 231 }
 232
 233 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t *status)
 234 {
 235         int retval = MPI_SUCCESS;
 236
 237         if (NULL == request) {
 238                 retval = MPI_ERR_INTERN;
 239         } else {
 240                 SIMIX_mutex_lock(request->mutex);
 241                 while (!request->completed) {
 242                         SIMIX_cond_wait(request->cond, request->mutex);
 243                 }
 244                 if (NULL != status) {
 245                         status->MPI_SOURCE = request->src;
 246                         status->MPI_TAG    = request->tag;
 247                         status->MPI_ERROR  = MPI_SUCCESS;
 248                 }
 249                 SIMIX_mutex_unlock(request->mutex);
 250         }
 251
 252         return retval;
 253 }