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 XBT_LOG_EXTERNAL_CATEGORY(smpi_base);
   5 XBT_LOG_EXTERNAL_CATEGORY(smpi_bench);
   6 XBT_LOG_EXTERNAL_CATEGORY(smpi_kernel);
   7 XBT_LOG_EXTERNAL_CATEGORY(smpi_mpi);
   8 XBT_LOG_EXTERNAL_CATEGORY(smpi_receiver);
   9 XBT_LOG_EXTERNAL_CATEGORY(smpi_sender);
  10 XBT_LOG_EXTERNAL_CATEGORY(smpi_util);
  11
  12 smpi_mpi_global_t smpi_mpi_global = NULL;
  13
  14 void smpi_mpi_land_func(void *a, void *b, int *length, MPI_Datatype *datatype);
  15
  16 void smpi_mpi_land_func(void *a, void *b, int *length, MPI_Datatype *datatype)
  17 {
  18         int i;
  19         if (*datatype == smpi_mpi_global->mpi_int) {
  20                 int *x = a, *y = b;
  21                 for (i = 0; i < *length; i++) {
  22                         y[i] = x[i] && y[i];
  23                 }
  24         }
  25 }
  26
  27 void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype *datatype);
  28
  29 void smpi_mpi_sum_func(void *a, void *b, int *length, MPI_Datatype *datatype)
  30 {
  31         int i;
  32         if (*datatype == smpi_mpi_global->mpi_int) {
  33                 int *x = a, *y = b;
  34                 for (i = 0; i < *length; i++) {
  35                         y[i] = x[i] + y[i];
  36                 }
  37         }
  38 }
  39
  40 int smpi_mpi_comm_rank(smpi_mpi_communicator_t comm)
  41 {
  42         return comm->index_to_rank_map[smpi_host_index()];
  43 }
  44
  45 void smpi_mpi_init()
  46 {
  47         smx_host_t host;
  48         smx_host_t *hosts;
  49         int host_count;
  50         int i;
  51         smpi_host_data_t hdata;
  52
  53    /* Connect our log channels: that must be done manually under windows */
  54    /* (should be done only once, not for each process) */
  55    XBT_LOG_CONNECT(smpi_base, smpi);
  56    XBT_LOG_CONNECT(smpi_bench, smpi);
  57    XBT_LOG_CONNECT(smpi_kernel, smpi);
  58    XBT_LOG_CONNECT(smpi_mpi, smpi);
  59    XBT_LOG_CONNECT(smpi_receiver, smpi);
  60    XBT_LOG_CONNECT(smpi_sender, smpi);
  61    XBT_LOG_CONNECT(smpi_util, smpi);
  62
  63         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
  64         smpi_global->running_hosts_count++;
  65         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
  66
  67         // initialize some local variables
  68         host       = SIMIX_host_self();
  69         hosts      = SIMIX_host_get_table();
  70         host_count = SIMIX_host_get_number();
  71
  72         hdata      = xbt_new(s_smpi_host_data_t, 1);
  73
  74         for (i = 0; i < host_count && host != hosts[i]; i ++);
  75
  76         hdata->index = i;
  77         hdata->mutex = SIMIX_mutex_init();
  78         hdata->cond  = SIMIX_cond_init();
  79
  80         SIMIX_host_set_data(host, hdata);
  81
  82         // node 0 sets the globals
  83         if (0 == i) {
  84
  85                 smpi_global->hosts                              = hosts;
  86                 smpi_global->host_count                         = host_count;
  87
  88                 smpi_mpi_global                                 = xbt_new(s_smpi_mpi_global_t, 1);
  89
  90                 // global communicator
  91                 smpi_mpi_global->mpi_comm_world                 = xbt_new(s_smpi_mpi_communicator_t, 1);
  92                 smpi_mpi_global->mpi_comm_world->size           = host_count;
  93                 smpi_mpi_global->mpi_comm_world->barrier_count  = 0;
  94                 smpi_mpi_global->mpi_comm_world->barrier_mutex  = SIMIX_mutex_init();
  95                 smpi_mpi_global->mpi_comm_world->barrier_cond   = SIMIX_cond_init();
  96                 smpi_mpi_global->mpi_comm_world->rank_to_index_map = xbt_new(int, host_count);
  97                 smpi_mpi_global->mpi_comm_world->index_to_rank_map = xbt_new(int, host_count);
  98                 for (i = 0; i < host_count; i++) {
  99                         smpi_mpi_global->mpi_comm_world->rank_to_index_map[i] = i;
 100                         smpi_mpi_global->mpi_comm_world->index_to_rank_map[i] = i;
 101                 }
 102
 103                 // mpi datatypes
 104                 smpi_mpi_global->mpi_byte                       = xbt_new(s_smpi_mpi_datatype_t, 1);
 105                 smpi_mpi_global->mpi_byte->size                 = (size_t)1;
 106                 smpi_mpi_global->mpi_int                        = xbt_new(s_smpi_mpi_datatype_t, 1);
 107                 smpi_mpi_global->mpi_int->size                  = sizeof(int);
 108                 smpi_mpi_global->mpi_double                     = xbt_new(s_smpi_mpi_datatype_t, 1);
 109                 smpi_mpi_global->mpi_double->size               = sizeof(double);
 110
 111                 // mpi operations
 112                 smpi_mpi_global->mpi_land                       = xbt_new(s_smpi_mpi_op_t, 1);
 113                 smpi_mpi_global->mpi_land->func                 = smpi_mpi_land_func;
 114                 smpi_mpi_global->mpi_sum                        = xbt_new(s_smpi_mpi_op_t, 1);
 115                 smpi_mpi_global->mpi_sum->func                  = smpi_mpi_sum_func;
 116
 117                 // signal all nodes to perform initialization
 118                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 119                 smpi_global->root_ready = 1;
 120                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 121                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 122
 123         } else {
 124
 125                 // make sure root is done before own initialization
 126                 SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 127                 while (!smpi_global->root_ready) {
 128                         SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 129                 }
 130                 SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 131
 132         }
 133
 134         // wait for all nodes to signal initializatin complete
 135         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 136         smpi_global->ready_process_count++;
 137         if (smpi_global->ready_process_count >= 3 * host_count) {
 138                 SIMIX_cond_broadcast(smpi_global->start_stop_cond);
 139         }
 140         while (smpi_global->ready_process_count < 3 * host_count) {
 141                 SIMIX_cond_wait(smpi_global->start_stop_cond, smpi_global->start_stop_mutex);
 142         }
 143         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 144
 145         return;
 146 }
 147
 148 void smpi_mpi_finalize()
 149 {
 150         int i;
 151
 152         SIMIX_mutex_lock(smpi_global->running_hosts_count_mutex);
 153         i = --smpi_global->running_hosts_count;
 154         SIMIX_mutex_unlock(smpi_global->running_hosts_count_mutex);
 155
 156         SIMIX_mutex_lock(smpi_global->start_stop_mutex);
 157         smpi_global->ready_process_count--;
 158         SIMIX_mutex_unlock(smpi_global->start_stop_mutex);
 159
 160         SIMIX_mutex_destroy(smpi_host_mutex());
 161         SIMIX_cond_destroy(smpi_host_cond());
 162
 163         if (0 >= i) {
 164
 165                 // wake up senders/receivers
 166                 for (i = 0; i < smpi_global->host_count; i++) {
 167                         if (SIMIX_process_is_suspended(smpi_global->sender_processes[i])) {
 168                                 SIMIX_process_resume(smpi_global->sender_processes[i]);
 169                         }
 170                         if (SIMIX_process_is_suspended(smpi_global->receiver_processes[i])) {
 171                                 SIMIX_process_resume(smpi_global->receiver_processes[i]);
 172                         }
 173                 }
 174
 175                 SIMIX_mutex_destroy(smpi_mpi_global->mpi_comm_world->barrier_mutex);
 176                 SIMIX_cond_destroy(smpi_mpi_global->mpi_comm_world->barrier_cond);
 177                 xbt_free(smpi_mpi_global->mpi_comm_world);
 178
 179                 xbt_free(smpi_mpi_global->mpi_byte);
 180                 xbt_free(smpi_mpi_global->mpi_int);
 181                 xbt_free(smpi_mpi_global->mpi_double);
 182
 183                 xbt_free(smpi_mpi_global->mpi_land);
 184                 xbt_free(smpi_mpi_global->mpi_sum);
 185
 186                 xbt_free(smpi_mpi_global);
 187
 188         }
 189
 190 }
 191
 192 int smpi_mpi_barrier(smpi_mpi_communicator_t comm)
 193 {
 194
 195         SIMIX_mutex_lock(comm->barrier_mutex);
 196         ++comm->barrier_count;
 197         if (comm->barrier_count > comm->size) { // only happens on second barrier...
 198                 comm->barrier_count = 0;
 199         } else if (comm->barrier_count == comm->size) {
 200                 SIMIX_cond_broadcast(comm->barrier_cond);
 201         }
 202         while (comm->barrier_count < comm->size) {
 203                 SIMIX_cond_wait(comm->barrier_cond, comm->barrier_mutex);
 204         }
 205         SIMIX_mutex_unlock(comm->barrier_mutex);
 206
 207         return MPI_SUCCESS;
 208 }
 209
 210 int smpi_mpi_isend(smpi_mpi_request_t request)
 211 {
 212         int retval = MPI_SUCCESS;
 213         int index  = smpi_host_index();
 214
 215         if (NULL == request) {
 216                 retval = MPI_ERR_INTERN;
 217         } else {
 218                 SIMIX_mutex_lock(smpi_global->pending_send_request_queues_mutexes[index]);
 219                 xbt_fifo_push(smpi_global->pending_send_request_queues[index], request);
 220                 SIMIX_mutex_unlock(smpi_global->pending_send_request_queues_mutexes[index]);
 221
 222                 if (SIMIX_process_is_suspended(smpi_global->sender_processes[index])) {
 223                         SIMIX_process_resume(smpi_global->sender_processes[index]);
 224                 }
 225         }
 226
 227         return retval;
 228 }
 229
 230 int smpi_mpi_irecv(smpi_mpi_request_t request)
 231 {
 232         int retval = MPI_SUCCESS;
 233         int index = smpi_host_index();
 234
 235         if (NULL == request) {
 236                 retval = MPI_ERR_INTERN;
 237         } else {
 238                 SIMIX_mutex_lock(smpi_global->pending_recv_request_queues_mutexes[index]);
 239                 xbt_fifo_push(smpi_global->pending_recv_request_queues[index], request);
 240                 SIMIX_mutex_unlock(smpi_global->pending_recv_request_queues_mutexes[index]);
 241
 242                 if (SIMIX_process_is_suspended(smpi_global->receiver_processes[index])) {
 243                         SIMIX_process_resume(smpi_global->receiver_processes[index]);
 244                 }
 245         }
 246
 247         return retval;
 248 }
 249
 250 int smpi_mpi_wait(smpi_mpi_request_t request, smpi_mpi_status_t *status)
 251 {
 252         int retval = MPI_SUCCESS;
 253
 254         if (NULL == request) {
 255                 retval = MPI_ERR_INTERN;
 256         } else {
 257                 SIMIX_mutex_lock(request->mutex);
 258                 while (!request->completed) {
 259                         SIMIX_cond_wait(request->cond, request->mutex);
 260                 }
 261                 if (NULL != status) {
 262                         status->MPI_SOURCE = request->src;
 263                         status->MPI_TAG    = request->tag;
 264                         status->MPI_ERROR  = MPI_SUCCESS;
 265                 }
 266                 SIMIX_mutex_unlock(request->mutex);
 267         }
 268
 269         return retval;
 270 }